PLEASE LEAVE YOUR SUGGESTION AND COMMENTS

PLEASE LEAVE YOUR SUGGESTION AND COMMENTS

Monday, 30 January 2012

Redistribution on both routers R2 and R3









































R2 Config:







interface Serial0/0
 ip address 192.168.12.2 255.255.255.0
 serial restart-delay 0
!
interface Serial0/1
 ip address 172.16.24.1 255.255.255.0
 serial restart-delay 0
!
router eigrp 10
 redistribute ospf 10 route-map o2e
 network 192.168.12.0
 auto-summary
!
router ospf 10
 router-id 2.2.2.2
 log-adjacency-changes
 redistribute eigrp 10 subnets route-map e2o
 network 172.16.24.0 0.0.0.255 area 0
!
access-list 10 permit 192.168.1.0 0.0.0.255
access-list 10 permit 192.168.12.0 0.0.0.255
access-list 10 permit 192.168.4.0 0.0.0.255
access-list 20 permit 192.168.2.0 0.0.0.255
access-list 20 permit 192.168.15.0 0.0.0.255
access-list 20 permit 192.168.13.0 0.0.0.255
access-list 30 deny   192.168.3.0 0.0.0.255
access-list 50 permit 172.16.24.0 0.0.0.255
access-list 50 permit 172.16.46.0 0.0.0.255
access-list 50 permit 172.16.1.0 0.0.0.255
access-list 50 permit 172.16.34.0 0.0.0.255
access-list 60 deny   172.16.2.0 0.0.0.255
!
route-map e2o permit 10
 match ip address 10
 set metric 100
 set metric-type type-2
 set tag 10
!
route-map e2o permit 20
 match ip address 20
 set metric 200
 set metric-type type-1
 set tag 20
!
route-map e2o permit 30
 match ip address 30
!
route-map e2o deny 40
 match tag 50
 set metric 300
 set metric-type type-1
 set tag 30
!


route-map o2e permit 10
 match ip address 50
 set metric 100 100 100 100 100
 set tag 50
!
route-map o2e permit 20
 match ip address 60
!
route-map o2e deny 30
 match tag 10 20 30
!


R3 Config


!
interface Serial0/0
 ip address 192.168.13.2 255.255.255.0
 serial restart-delay 0
!
interface Serial0/1
 ip address 172.16.34.1 255.255.255.0
 serial restart-delay 0
!
router eigrp 10
 redistribute ospf 10 route-map o2e
 network 192.168.13.0
 auto-summary
!
router ospf 10
 router-id 3.3.3.3
 log-adjacency-changes
 redistribute eigrp 10 subnets route-map e2o
 network 172.16.34.0 0.0.0.255 area 0
!
no ip http server
no ip http secure-server
!
ip forward-protocol nd
!
!
access-list 10 permit 192.168.1.0 0.0.0.255
access-list 10 permit 192.168.12.0 0.0.0.255
access-list 10 permit 192.168.4.0 0.0.0.255
access-list 20 permit 192.168.2.0 0.0.0.255
access-list 20 permit 192.168.15.0 0.0.0.255
access-list 20 permit 192.168.13.0 0.0.0.255
access-list 30 deny   192.168.3.0 0.0.0.255
access-list 50 permit 172.16.24.0 0.0.0.255
access-list 50 permit 172.16.46.0 0.0.0.255
access-list 50 permit 172.16.1.0 0.0.0.255
access-list 50 permit 172.16.34.0 0.0.0.255
access-list 60 deny   172.16.2.0 0.0.0.255
!
route-map e2o permit 10
 match ip address 10
 set metric 100
 set metric-type type-2
 set tag 10
!
route-map e2o permit 20
 match ip address 20
 set metric 200
 set metric-type type-1
 set tag 20
!
route-map e2o permit 30
 match ip address 30
!
route-map e2o deny 40
 match tag 50
 set metric 300
 set metric-type type-1
 set tag 30
!
route-map o2e permit 10
 match ip address 50
 set metric 100 100 100 100 100
 set tag 50
!
route-map o2e permit 20
 match ip address 60
!
route-map o2e deny 30
 match tag 10 20 30
!

Output on R1:

R1#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

C    192.168.12.0/24 is directly connected, Serial0/1
C    192.168.13.0/24 is directly connected, Serial0/2
C    192.168.15.0/24 is directly connected, Serial0/0
     172.16.0.0/16 is variably subnetted, 4 subnets, 2 masks
D EX    172.16.46.0/24 [170/26137600] via 192.168.13.2, 00:20:08, Serial0/2
                       [170/26137600] via 192.168.12.2, 00:20:08, Serial0/1
D EX    172.16.34.0/24 [170/26137600] via 192.168.13.2, 00:20:08, Serial0/2
                       [170/26137600] via 192.168.12.2, 00:20:08, Serial0/1
D EX    172.16.24.0/24 [170/26137600] via 192.168.13.2, 00:20:09, Serial0/2
                       [170/26137600] via 192.168.12.2, 00:20:09, Serial0/1
D EX    172.16.1.1/32 [170/26137600] via 192.168.13.2, 00:20:09, Serial0/2
                      [170/26137600] via 192.168.12.2, 00:20:09, Serial0/1
D    192.168.4.0/24 [90/2297856] via 192.168.15.1, 00:48:45, Serial0/0
D    192.168.5.0/24 [90/2297856] via 192.168.15.1, 00:48:46, Serial0/0
D    192.168.1.0/24 [90/2297856] via 192.168.15.1, 00:48:46, Serial0/0
D    192.168.2.0/24 [90/2297856] via 192.168.15.1, 00:48:46, Serial0/0
D    192.168.3.0/24 [90/2297856] via 192.168.15.1, 00:48:46, Serial0/0

R4 Output:


R4#wr
Building configuration...
[OK]
R4#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

O E2 192.168.12.0/24 [110/100] via 172.16.34.1, 00:21:14, Serial0/1
                     [110/100] via 172.16.24.1, 00:21:14, Serial0/0
O E1 192.168.13.0/24 [110/264] via 172.16.34.1, 00:21:14, Serial0/1
                     [110/264] via 172.16.24.1, 00:21:14, Serial0/0
O E1 192.168.15.0/24 [110/264] via 172.16.34.1, 00:21:14, Serial0/1
                     [110/264] via 172.16.24.1, 00:21:14, Serial0/0
     172.16.0.0/16 is variably subnetted, 5 subnets, 2 masks
C       172.16.46.0/24 is directly connected, Serial0/2
C       172.16.34.0/24 is directly connected, Serial0/1
C       172.16.24.0/24 is directly connected, Serial0/0
O       172.16.1.1/32 [110/65] via 172.16.46.2, 00:42:32, Serial0/2
O       172.16.2.1/32 [110/65] via 172.16.46.2, 00:42:32, Serial0/2
O E2 192.168.4.0/24 [110/100] via 172.16.34.1, 00:21:16, Serial0/1
                    [110/100] via 172.16.24.1, 00:21:16, Serial0/0
O E2 192.168.1.0/24 [110/100] via 172.16.34.1, 00:21:17, Serial0/1
                    [110/100] via 172.16.24.1, 00:21:17, Serial0/0
O E1 192.168.2.0/24 [110/264] via 172.16.34.1, 00:21:17, Serial0/1
                    [110/264] via 172.16.24.1, 00:21:17, Serial0/0
R4#

Added Ravindra Krishna at 13:20 0 comments
Labels:

Redistribution






R2 Config



!
interface Serial0/0
 ip address 192.168.12.2 255.255.255.0
 serial restart-delay 0
!
interface Serial0/1
 ip address 172.16.24.1 255.255.255.0
 serial restart-delay 0
!
router eigrp 10
 network 192.168.12.0
 auto-summary
!
router ospf 10
 router-id 2.2.2.2
 log-adjacency-changes
 redistribute eigrp 10 subnets route-map EIGRP2OSPF
 network 172.16.24.0 0.0.0.255 area 0
!
access-list 10 permit 192.168.1.0 0.0.0.255
access-list 10 permit 192.168.12.0 0.0.0.255
access-list 10 permit 192.168.4.0 0.0.0.255
access-list 20 permit 192.168.2.0 0.0.0.255
access-list 20 permit 192.168.15.0 0.0.0.255
access-list 20 permit 192.168.13.0 0.0.0.255
access-list 30 deny   192.168.3.0 0.0.0.255
!
route-map EIGRP2OSPF permit 10
 match ip address 10
 set metric 100
 set metric-type type-2
 set tag 10
!
route-map EIGRP2OSPF permit 20
 match ip address 20
 set metric 200
 set metric-type type-1
 set tag 20
!
route-map EIGRP2OSPF permit 30
 match ip address 30
!
route-map EIGRP2OSPF permit 40
 set metric 300
 set metric-type type-1
 set tag 30
!
route-map EIGRP2OSPF deny 50
 match tag 40
!


R3 Config:


interface Serial0/0
 ip address 192.168.13.2 255.255.255.0
 serial restart-delay 0
!
interface Serial0/1
 ip address 172.16.34.1 255.255.255.0
 serial restart-delay 0
!
interface Serial0/2
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial0/3
 no ip address
 shutdown
 serial restart-delay 0
!
router eigrp 10
 redistribute ospf 10 route-map OSPF2EIGRP
 network 192.168.13.0
 auto-summary
!
router ospf 10
 router-id 3.3.3.3
 log-adjacency-changes
 network 172.16.34.0 0.0.0.255 area 0
!
no ip http server
no ip http secure-server
!
ip forward-protocol nd
!
!
access-list 30 permit 172.16.24.0 0.0.0.255
access-list 30 permit 172.16.34.0 0.0.0.255
access-list 30 permit 172.16.46.0 0.0.0.255
access-list 30 permit 172.16.1.0 0.0.0.255
!
route-map OSPF2EIGRP permit 10
 match ip address 30
 set metric 100 100 100 100 100
 set tag 40
!
route-map OSPF2EIGRP deny 20
 match tag 10 20 30
!
Added Ravindra Krishna at 12:03 0 comments
Labels:

Saturday, 28 January 2012

HOW TO PASS TSHOOT :: STRATEGY

I was wondering, how to pass the TSHOOT. I successfully completed the routing and switching. Now the big challenge is ahead : TSHOOT.

I was very confused on the approach I should take to pass this exam. Later, I though, let me put down what I actually know.

I started making complex networks. Making a complex networks you will always do some mistakes and you will start troubleshooting the issue. So I created some complex networks to understand the base line(just to revise myself).

Things I forgot were back in the brain. I started recollecting everything. CCNP CBT nuggets took me almost 4 months to understand and work it up during my routing exam. But to revise it now just took 6 hours.

Now that I am done, I started creating these big networks(making sure that I do mistakes in this process) and understand how that things should work in first place. Reading the error outputs, checking different commands, how to use these commands to workout for a solution.

I finally planned my strategy:
1> Start creating complex networks: you will definitely make mistakes.
2> Try including all routing protocols, all type of areas(like in ospf) in to one single network.
3> Throw frame relay just for fun
4> read as you go. if you are stuck at some point, go back to you routing books and videos and refresh them.
5> I planned the preparing the topics in the following manner
             1> routing protocols
             2> redistribution along with point 1
             3> switching
             4> etherchannel and high availability
             5> IPv6
             6> Finally prepare the network diagram given for the TSHOOT: just to make sure I understand everything and better understand how the network should work in first place.

I will try posting the scenarios which I prepared.

Regards,

Added Ravindra Krishna at 11:42 1 comments
Labels:

TSHOOT OSPF



To Successfully complete the above scenario, you should be able to ping the following from R1


1> 112.112.112.1
2>122.122.122.1
3>172.16.2.1


r1 output:


D EX 192.168.106.0/24 [170/7289856] via 192.168.12.2, 01:28:46, Serial0/0
C    192.168.12.0/24 is directly connected, Serial0/0
     1.0.0.0/24 is subnetted, 1 subnets
C       1.1.1.0 is directly connected, Loopback1
     2.0.0.0/24 is subnetted, 1 subnets
C       2.2.2.0 is directly connected, Loopback2
     169.16.0.0/24 is subnetted, 1 subnets
D EX    169.16.1.0 [170/7289856] via 192.168.12.2, 02:08:56, Serial0/0
     189.16.0.0/24 is subnetted, 1 subnets
D EX    189.16.1.0 [170/7289856] via 192.168.12.2, 00:34:13, Serial0/0
     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
D EX    172.16.1.0/24 [170/7289856] via 192.168.12.2, 02:08:58, Serial0/0
D EX    172.16.2.1/32 [170/7289856] via 192.168.12.2, 02:03:20, Serial0/0
D EX 112.0.0.0/8 [170/7289856] via 192.168.12.2, 01:28:53, Serial0/0
     179.16.0.0/24 is subnetted, 1 subnets
D EX    179.16.1.0 [170/7289856] via 192.168.12.2, 02:09:03, Serial0/0
     10.0.0.0/24 is subnetted, 1 subnets
D EX    10.10.10.0 [170/7289856] via 192.168.12.2, 02:09:03, Serial0/0
     122.0.0.0/32 is subnetted, 1 subnets
D EX    122.122.122.1 [170/7289856] via 192.168.12.2, 00:34:20, Serial0/0
     133.133.0.0/32 is subnetted, 1 subnets
D EX    133.133.133.1 [170/7289856] via 192.168.12.2, 00:34:20, Serial0/0


R4 output


     169.16.0.0/24 is subnetted, 1 subnets
O IA    169.16.1.0 [110/192] via 172.16.1.1, 02:04:38, Serial0/0
     189.16.0.0/24 is subnetted, 1 subnets
O IA    189.16.1.0 [110/256] via 172.16.1.1, 00:35:40, Serial0/0
     172.16.0.0/24 is subnetted, 2 subnets
C       172.16.1.0 is directly connected, Serial0/0
C       172.16.2.0 is directly connected, Loopback1
     179.16.0.0/24 is subnetted, 1 subnets
O IA    179.16.1.0 [110/192] via 172.16.1.1, 02:04:38, Serial0/0
     10.0.0.0/24 is subnetted, 1 subnets
O IA    10.10.10.0 [110/128] via 172.16.1.1, 02:04:40, Serial0/0
     122.0.0.0/32 is subnetted, 1 subnets
O IA    122.122.122.1 [110/257] via 172.16.1.1, 00:35:41, Serial0/0
     133.133.0.0/32 is subnetted, 1 subnets
O IA    133.133.133.1 [110/257] via 172.16.1.1, 00:35:42, Serial0/0
O*IA 0.0.0.0/0 [110/65] via 172.16.1.1, 02:04:41, Serial0/0

R10 Output

R10#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is 169.16.1.1 to network 0.0.0.0

C    192.168.106.0/24 is directly connected, Serial0/1
     169.16.0.0/24 is subnetted, 1 subnets
C       169.16.1.0 is directly connected, Serial0/0
R    112.0.0.0/8 [120/1] via 192.168.106.2, 00:00:12, Serial0/1
O*IA 0.0.0.0/0 [110/65] via 169.16.1.1, 01:40:28, Serial0/0

R9 output:
R9(config)#do sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

O E2 192.168.106.0/24 [110/10] via 189.16.1.1, 00:47:03, Serial0/0
O E2 192.168.12.0/24 [110/20] via 189.16.1.1, 00:47:03, Serial0/0
     1.0.0.0/24 is subnetted, 1 subnets
O E2    1.1.1.0 [110/20] via 189.16.1.1, 00:47:03, Serial0/0
     2.0.0.0/24 is subnetted, 1 subnets
O E2    2.2.2.0 [110/20] via 189.16.1.1, 00:47:03, Serial0/0
     169.16.0.0/24 is subnetted, 1 subnets
O IA    169.16.1.0 [110/256] via 189.16.1.1, 00:47:03, Serial0/0
     189.16.0.0/24 is subnetted, 1 subnets
C       189.16.1.0 is directly connected, Serial0/0
     172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks
O IA    172.16.1.0/24 [110/256] via 189.16.1.1, 00:47:04, Serial0/0
O IA    172.16.2.1/32 [110/257] via 189.16.1.1, 00:47:04, Serial0/0
O E2 112.0.0.0/8 [110/10] via 189.16.1.1, 00:47:05, Serial0/0
     179.16.0.0/24 is subnetted, 1 subnets
O IA    179.16.1.0 [110/128] via 189.16.1.1, 00:47:15, Serial0/0
     10.0.0.0/24 is subnetted, 1 subnets
O IA    10.10.10.0 [110/192] via 189.16.1.1, 00:47:05, Serial0/0
     122.0.0.0/24 is subnetted, 1 subnets
C       122.122.122.0 is directly connected, Loopback1
     133.133.0.0/24 is subnetted, 1 subnets
C       133.133.133.0 is directly connected, Loopback2


R6 Config



!
interface Loopback1
 ip address 112.112.112.1 255.255.255.0
!
interface Serial0/0
 ip address 192.168.106.2 255.255.255.0
 serial restart-delay 0
!
router rip
 version 2
 network 112.0.0.0
 network 192.168.106.0
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 192.168.106.1
!

r2 config



!
interface Serial0/0
 ip address 192.168.12.2 255.255.255.0
 serial restart-delay 0
!
interface Serial0/1
 ip address 10.10.10.2 255.255.255.0
 encapsulation frame-relay
 serial restart-delay 0
 frame-relay map ip 10.10.10.3 203 broadcast
 frame-relay map ip 10.10.10.5 205 broadcast
 frame-relay map ip 10.10.10.7 207 broadcast
!
router eigrp 10
 redistribute ospf 10 metric 1544 20000 255 1 1500
 network 192.168.12.0
 auto-summary
!
router ospf 10
 router-id 12.12.12.2
 log-adjacency-changes
 redistribute eigrp 10 subnets
 network 10.10.10.0 0.0.0.255 area 0
 neighbor 10.10.10.3
 neighbor 10.10.10.5
 neighbor 10.10.10.7
!



Added Ravindra Krishna at 05:57 0 comments
Labels:

Friday, 27 January 2012

TSHOOT: EIGRP REDISTRIBUTION







r1


!
interface Serial0/0
 ip address 10.10.10.2 255.255.255.0
 ip summary-address eigrp 1 192.168.4.0 255.255.252.0 5
 serial restart-delay 0
!
interface Serial0/1
 ip address 10.20.20.1 255.255.255.0
 ip summary-address eigrp 1 192.168.0.0 255.255.252.0 5
 serial restart-delay 0
!
interface Serial0/2
 no ip address
 shutdown
 serial restart-delay 0
!
interface Serial0/3
 no ip address
 shutdown
 serial restart-delay 0
!
router eigrp 1
 network 10.10.10.0 0.0.0.255
 network 10.20.20.0 0.0.0.255
 no auto-summary
!

Added Ravindra Krishna at 11:32 0 comments
Labels:

TSHOOT : EIGRP over NBMA




 In the above practical, I wanted to revise whatever I learned in CCNP route EIGRP:

Above diagram is in the GNS3 and to the right in the logical diagram of the network.

I covered following eigrp over
1> multipoint NBMA
2> point to point NBMA
3> point to multipoint
4> redistribution

I am going to paste the config of the R1 and R5. And outout from R7 and R4


R1 Config




interface Loopback1
 ip address 172.16.1.1 255.255.255.0
!
interface Serial0/0
 no ip address
 encapsulation frame-relay
 no ip split-horizon eigrp 10
 no ip split-horizon eigrp 11
 serial restart-delay 0
!
interface Serial0/0.1 point-to-point
 ip address 192.168.1.1 255.255.255.0
 snmp trap link-status
 frame-relay interface-dlci 103
!
interface Serial0/0.2 point-to-point
 ip address 192.168.2.1 255.255.255.0
 snmp trap link-status
 frame-relay interface-dlci 104
!
interface Serial0/0.3 multipoint
 ip address 10.10.10.4 255.255.255.0
 snmp trap link-status
 frame-relay map ip 10.10.10.1 105 broadcast
!
router eigrp 10
 redistribute eigrp 11
 network 172.16.1.0 0.0.0.255
 network 192.168.1.0
 network 192.168.2.0
 no auto-summary
!
router eigrp 11
 redistribute eigrp 10
 network 10.10.10.0 0.0.0.255
 no auto-summary
!

R5 Config




interface Loopback1
 ip address 172.16.5.1 255.255.255.0
!
interface Serial0/0
 ip address 10.10.10.1 255.255.255.0
 encapsulation frame-relay
 no ip split-horizon eigrp 11
 serial restart-delay 0
 frame-relay map ip 10.10.10.2 506 broadcast
 frame-relay map ip 10.10.10.3 507 broadcast
 frame-relay map ip 10.10.10.4 501 broadcast
!
router eigrp 11
 network 10.10.10.0 0.0.0.255
 network 172.16.5.0 0.0.0.255
 no auto-summary
!




OUTPUT from R4


R4#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 6 subnets
C       172.16.4.0 is directly connected, Loopback1
D EX    172.16.5.0 [170/2809856] via 192.168.2.1, 00:33:02, Serial0/0.1
D EX    172.16.6.0 [170/3321856] via 192.168.2.1, 00:33:02, Serial0/0.1
D EX    172.16.7.0 [170/3321856] via 192.168.2.1, 00:33:02, Serial0/0.1
D       172.16.1.0 [90/2297856] via 192.168.2.1, 00:58:44, Serial0/0.1
D       172.16.3.0 [90/2809856] via 192.168.2.1, 00:50:57, Serial0/0.1
     10.0.0.0/24 is subnetted, 1 subnets
D EX    10.10.10.0 [170/2681856] via 192.168.2.1, 00:33:03, Serial0/0.1
D    192.168.1.0/24 [90/2681856] via 192.168.2.1, 00:58:46, Serial0/0.1
C    192.168.2.0/24 is directly connected, Serial0/0.1


Output from R7



R7#sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     172.16.0.0/24 is subnetted, 6 subnets
D EX    172.16.4.0 [170/3321856] via 10.10.10.1, 00:27:05, Serial0/0
D       172.16.5.0 [90/2297856] via 10.10.10.1, 00:42:51, Serial0/0
D       172.16.6.0 [90/2297856] via 10.10.10.2, 00:42:51, Serial0/0
C       172.16.7.0 is directly connected, Loopback1
D EX    172.16.1.0 [170/2809856] via 10.10.10.1, 00:27:05, Serial0/0
D EX    172.16.3.0 [170/3321856] via 10.10.10.1, 00:27:05, Serial0/0
     10.0.0.0/24 is subnetted, 1 subnets
C       10.10.10.0 is directly connected, Serial0/0
D EX 192.168.1.0/24 [170/3193856] via 10.10.10.1, 00:27:07, Serial0/0
D EX 192.168.2.0/24 [170/3193856] via 10.10.10.1, 00:27:07, Serial0/0



Why split horizon is required on serial0/0 on R1 and R5??




Added Ravindra Krishna at 03:37 0 comments
Labels:

Thursday, 26 January 2012

TSHOOT: EIGRP AD & FD PART 3




















In Part 2 we have seen the show ip route output as


D    192.168.4.0/24 [90/358400] via 192.168.1.4, 00:45:42, Ethernet0/0
                    [90/358400] via 192.168.1.2, 00:45:42, Ethernet0/0
                    [90/358400] via 192.168.1.1, 00:45:42, Ethernet0/0
D    192.168.5.0/24 [90/486400] via 192.168.1.4, 00:45:42, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:45:42, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:45:42, Ethernet0/0
D    192.168.6.0/24 [90/486400] via 192.168.1.4, 00:45:42, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:45:43, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:45:43, Ethernet0/0
C    192.168.7.0/24 is directly connected, Ethernet0/1
C    192.168.1.0/24 is directly connected, Ethernet0/0
D    192.168.2.0/24 [90/307200] via 192.168.1.4, 01:06:55, Ethernet0/0
                    [90/307200] via 192.168.1.2, 01:06:55, Ethernet0/0
                    [90/307200] via 192.168.1.1, 01:06:55, Ethernet0/0
D    192.168.3.0/24 [90/332800] via 192.168.1.4, 00:45:46, Ethernet0/0
                    [90/332800] via 192.168.1.2, 00:45:46, Ethernet0/0
                    [90/332800] via 192.168.1.1, 00:45:46, Ethernet0/0

But now in this scenario we have the below output

D    192.168.4.0/24 [90/358400] via 192.168.1.4, 00:00:21, Ethernet0/0
                    [90/358400] via 192.168.1.2, 00:00:21, Ethernet0/0
                    [90/358400] via 192.168.1.1, 00:00:21, Ethernet0/0
D    192.168.5.0/24 [90/2713600] via 192.168.7.2, 00:00:21, Ethernet0/1
                    [90/486400] via 192.168.1.4, 00:00:21, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:00:21, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:00:21, Ethernet0/0
D    192.168.6.0/24 [90/2713600] via 192.168.7.2, 00:00:22, Ethernet0/1
                    [90/486400] via 192.168.1.4, 00:00:22, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:00:22, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:00:22, Ethernet0/0
C    192.168.7.0/24 is directly connected, Ethernet0/1
C    192.168.1.0/24 is directly connected, Ethernet0/0
D    192.168.2.0/24 [90/307200] via 192.168.1.4, 00:00:25, Ethernet0/0
                    [90/307200] via 192.168.1.2, 00:00:25, Ethernet0/0
                    [90/307200] via 192.168.1.1, 00:00:25, Ethernet0/0
D    192.168.3.0/24 [90/332800] via 192.168.1.4, 00:00:25, Ethernet0/0
                    [90/332800] via 192.168.1.2, 00:00:25, Ethernet0/0
                    [90/332800] via 192.168.1.1, 00:00:25, Ethernet0/0



why the above behavior based on the output shown below?

R6#sh run | b eigrp
router eigrp 10
 variance 6
 network 192.168.1.0
 network 192.168.7.0
 no auto-summary

Now the new question is why Variance is 6??




Added Ravindra Krishna at 14:26 0 comments
Labels:

TSHOOT: EIGRP AD & FD PART 2




















Now check this out! I have changed the bandwidth from default 10000 to 1000. Due to the change in the K value there is change in the topology and the route table.


R6(config)#do sh run inter e0/1
Building configuration...

Current configuration : 96 bytes
!
interface Ethernet0/1
 bandwidth 1000
 ip address 192.168.7.1 255.255.255.0
 half-duplex
end

R6(config)#do sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D    192.168.4.0/24 [90/358400] via 192.168.1.4, 00:07:07, Ethernet0/0
                    [90/358400] via 192.168.1.2, 00:07:07, Ethernet0/0
                    [90/358400] via 192.168.1.1, 00:07:07, Ethernet0/0
D    192.168.5.0/24 [90/486400] via 192.168.1.4, 00:07:06, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:07:06, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:07:06, Ethernet0/0
D    192.168.6.0/24 [90/486400] via 192.168.1.4, 00:07:06, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:07:08, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:07:08, Ethernet0/0
C    192.168.7.0/24 is directly connected, Ethernet0/1
C    192.168.1.0/24 is directly connected, Ethernet0/0
D    192.168.2.0/24 [90/307200] via 192.168.1.4, 00:28:20, Ethernet0/0
                    [90/307200] via 192.168.1.2, 00:28:20, Ethernet0/0
                    [90/307200] via 192.168.1.1, 00:28:20, Ethernet0/0
D    192.168.3.0/24 [90/332800] via 192.168.1.4, 00:07:12, Ethernet0/0
                    [90/332800] via 192.168.1.2, 00:07:12, Ethernet0/0
                    [90/332800] via 192.168.1.1, 00:07:12, Ethernet0/0

R6(config)#do sh ip eigrp top
IP-EIGRP Topology Table for AS(10)/ID(192.168.1.3)

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P 192.168.1.0/24, 1 successors, FD is 281600
        via Connected, Ethernet0/0
P 192.168.2.0/24, 3 successors, FD is 307200
        via 192.168.1.1 (307200/281600), Ethernet0/0
        via 192.168.1.2 (307200/281600), Ethernet0/0, serno 76
        via 192.168.1.4 (307200/281600), Ethernet0/0, serno 57
P 192.168.3.0/24, 3 successors, FD is 332800
        via 192.168.1.1 (332800/307200), Ethernet0/0
        via 192.168.1.2 (332800/307200), Ethernet0/0, serno 77
        via 192.168.1.4 (332800/307200), Ethernet0/0, serno 89
        via 192.168.7.2 (2636800/307200), Ethernet0/1
P 192.168.4.0/24, 3 successors, FD is 358400
        via 192.168.1.1 (358400/332800), Ethernet0/0
        via 192.168.1.2 (358400/332800), Ethernet0/0
        via 192.168.1.4 (358400/332800), Ethernet0/0
        via 192.168.7.2 (2611200/281600), Ethernet0/1
P 192.168.5.0/24, 3 successors, FD is 486400
        via 192.168.1.1 (486400/460800), Ethernet0/0
        via 192.168.1.2 (486400/460800), Ethernet0/0
        via 192.168.1.4 (486400/460800), Ethernet0/0
        via 192.168.7.2 (2713600/128256), Ethernet0/1
P 192.168.6.0/24, 3 successors, FD is 486400
        via 192.168.1.1 (486400/460800), Ethernet0/0
        via 192.168.1.2 (486400/460800), Ethernet0/0
        via 192.168.1.4 (486400/460800), Ethernet0/0
        via 192.168.7.2 (2713600/128256), Ethernet0/1
P 192.168.7.0/24, 1 successors, FD is 2585600
        via Connected, Ethernet0/1
        via 192.168.1.1 (384000/358400), Ethernet0/0
        via 192.168.1.4 (384000/358400), Ethernet0/0
        via 192.168.1.2 (384000/358400), Ethernet0/0

Why
1> Changing the bandwidth caused the change in the output of the show ip route?
2> Why the best routes are via 192.168.1.1, 192.168.1.2 and 192.168.1.4 and why not 192.168.7.2 any more?
3> Is there any other parameter that can be changed to make this work alike?



Added Ravindra Krishna at 13:55 0 comments
Labels:

TSHOOT: EIGRP AD & FD PART 1




















The only change I did in the scenario is that I have added a direct link from R6 to R8.

Before adding this link the topology table in R6 was:



R6(config-if)#do sh ip eigrp top
IP-EIGRP Topology Table for AS(10)/ID(192.168.1.3)

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P 192.168.1.0/24, 1 successors, FD is 281600
        via Connected, Ethernet0/0
P 192.168.2.0/24, 3 successors, FD is 307200
        via 192.168.1.1 (307200/281600), Ethernet0/0
        via 192.168.1.2 (307200/281600), Ethernet0/0, serno 76
        via 192.168.1.4 (307200/281600), Ethernet0/0, serno 57
P 192.168.3.0/24, 3 successors, FD is 332800
        via 192.168.1.1 (332800/307200), Ethernet0/0
        via 192.168.1.2 (332800/307200), Ethernet0/0, serno 77
        via 192.168.1.4 (332800/307200), Ethernet0/0, serno 89
P 192.168.4.0/24, 3 successors, FD is 358400
        via 192.168.1.1 (358400/332800), Ethernet0/0
        via 192.168.1.2 (358400/332800), Ethernet0/0
        via 192.168.1.4 (358400/332800), Ethernet0/0
P 192.168.5.0/24, 3 successors, FD is 486400
        via 192.168.1.1 (486400/460800), Ethernet0/0
        via 192.168.1.2 (486400/460800), Ethernet0/0
        via 192.168.1.4 (486400/460800), Ethernet0/0
P 192.168.6.0/24, 3 successors, FD is 486400
        via 192.168.1.1 (486400/460800), Ethernet0/0
        via 192.168.1.2 (486400/460800), Ethernet0/0
        via 192.168.1.4 (486400/460800), Ethernet0/0
P 192.168.7.0/24, 3 successors, FD is 384000
        via 192.168.1.1 (384000/358400), Ethernet0/0
        via 192.168.1.2 (384000/358400), Ethernet0/0
        via 192.168.1.4 (384000/358400), Ethernet0/0


AFTER ADDING THE LINK


R6(config-if)#do sh ip eigrp top
IP-EIGRP Topology Table for AS(10)/ID(192.168.1.3)

Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P 192.168.1.0/24, 1 successors, FD is 281600
        via Connected, Ethernet0/0
P 192.168.2.0/24, 3 successors, FD is 307200
        via 192.168.1.1 (307200/281600), Ethernet0/0
        via 192.168.1.2 (307200/281600), Ethernet0/0, serno 76
        via 192.168.1.4 (307200/281600), Ethernet0/0, serno 57
P 192.168.3.0/24, 4 successors, FD is 332800
        via 192.168.1.1 (332800/307200), Ethernet0/0
        via 192.168.1.2 (332800/307200), Ethernet0/0, serno 77
        via 192.168.1.4 (332800/307200), Ethernet0/0, serno 89
        via 192.168.7.2 (332800/307200), Ethernet0/1
P 192.168.4.0/24, 1 successors, FD is 307200
        via 192.168.7.2 (307200/281600), Ethernet0/1
P 192.168.5.0/24, 1 successors, FD is 409600
        via 192.168.7.2 (409600/128256), Ethernet0/1
P 192.168.6.0/24, 1 successors, FD is 409600
        via 192.168.7.2 (409600/128256), Ethernet0/1
P 192.168.7.0/24, 1 successors, FD is 281600
        via Connected, Ethernet0/1


why??







Added Ravindra Krishna at 13:15 1 comments
Labels:

TSHOOT: EIGRP




















I wanted to revise the EIGRP completely. So i have created above diagram.

Now questions:


Scenario 1

How many neighbors should I expect in the R6 and how many in the active routes for the network 192.168.6.0 in R6?


R6#show ip eigrp neighbors
IP-EIGRP neighbors for process 10
H   Address                 Interface       Hold Uptime   SRTT   RTO  Q  Seq
                                            (sec)         (ms)       Cnt Num
2   192.168.1.4             Et0/0             13 01:18:39   86   774  0  69
1   192.168.1.2             Et0/0             11 01:31:08   90   810  0  78
0   192.168.1.1             Et0/0             11 01:32:36  125  1125  0  70

R6#show ip route 192.168.6.0
Routing entry for 192.168.6.0/24
  Known via "eigrp 10", distance 90, metric 486400, type internal
  Redistributing via eigrp 10
  Last update from 192.168.1.1 on Ethernet0/0, 00:37:29 ago
  Routing Descriptor Blocks:
  * 192.168.1.4, from 192.168.1.4, 00:37:29 ago, via Ethernet0/0
      Route metric is 486400, traffic share count is 1
      Total delay is 9000 microseconds, minimum bandwidth is 10000 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 4
    192.168.1.2, from 192.168.1.2, 00:37:29 ago, via Ethernet0/0
      Route metric is 486400, traffic share count is 1
      Total delay is 9000 microseconds, minimum bandwidth is 10000 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 4
    192.168.1.1, from 192.168.1.1, 00:37:29 ago, via Ethernet0/0
      Route metric is 486400, traffic share count is 1
      Total delay is 9000 microseconds, minimum bandwidth is 10000 Kbit
      Reliability 255/255, minimum MTU 1500 bytes
      Loading 1/255, Hops 4

R6#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

D    192.168.4.0/24 [90/358400] via 192.168.1.4, 00:45:33, Ethernet0/0
                    [90/358400] via 192.168.1.2, 00:45:33, Ethernet0/0
                    [90/358400] via 192.168.1.1, 00:45:33, Ethernet0/0
D    192.168.5.0/24 [90/486400] via 192.168.1.4, 00:38:09, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:38:09, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:38:09, Ethernet0/0
D    192.168.6.0/24 [90/486400] via 192.168.1.4, 00:38:09, Ethernet0/0
                    [90/486400] via 192.168.1.2, 00:38:11, Ethernet0/0
                    [90/486400] via 192.168.1.1, 00:38:11, Ethernet0/0
C    192.168.1.0/24 is directly connected, Ethernet0/0
D    192.168.2.0/24 [90/307200] via 192.168.1.4, 01:19:59, Ethernet0/0
                    [90/307200] via 192.168.1.2, 01:19:59, Ethernet0/0
                    [90/307200] via 192.168.1.1, 01:19:59, Ethernet0/0
D    192.168.3.0/24 [90/332800] via 192.168.1.4, 01:15:58, Ethernet0/0
                    [90/332800] via 192.168.1.2, 01:15:58, Ethernet0/0
                    [90/332800] via 192.168.1.1, 01:15:58, Ethernet0/0





Added Ravindra Krishna at 12:36 0 comments
Labels:

Wednesday, 25 January 2012

TSHOOT : PVST





















1>Which is the Root bridge for vlan 1
2> What is the total cost from SW5(12 O'clock) to reach the root bridge based on the output below
3>What is the difference between scenario 1 and scenario 2



Scenario 1

SW5#show spanning-tree vlan 1
VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    4097
             Address     00E0.F792.B6D5
             Cost        19
             Port        3(FastEthernet0/3)
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     0001.430B.2854
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Altn BLK 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/3            Root FWD 19        128.3    P2p


SW4#show spanning-tree vlan 1
VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    4097
             Address     00E0.F792.B6D5
             Cost        19
             Port        4(FastEthernet0/4)
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     00D0.D312.ECD4
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Desg FWD 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/3            Desg FWD 19        128.3    P2p
Fa0/4            Root FWD 19        128.4    P2p
Fa0/5            Desg FWD 19        128.5    P2p
Fa0/6            Desg FWD 19        128.6    P2p

Scenario 2


SW5#show spanning-tree vlan 1
VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    4097
             Address     00E0.F792.B6D5
             Cost        19
             Port        1(FastEthernet0/1)
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     0001.430B.2854
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Root FWD 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/3            Altn BLK 100       128.3    P2p



SW4#show spanning-tree vlan 1
VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    4097
             Address     00E0.F792.B6D5
             Cost        19
             Port        4(FastEthernet0/4)
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     00D0.D312.ECD4
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Desg FWD 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/3            Desg FWD 19        128.3    P2p
Fa0/4            Root FWD 19        128.4    P2p
Fa0/5            Desg FWD 19        128.5    P2p
Fa0/6            Desg FWD 100       128.6    P2p


SW0#show spanning-tree vlan 1
VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    4097
             Address     00E0.F792.B6D5
             Cost        19
             Port        3(FastEthernet0/3)
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    32769  (priority 32768 sys-id-ext 1)
             Address     00E0.A369.DBDE
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Desg FWD 19        128.1    P2p
Fa0/2            Altn BLK 19        128.2    P2p
Fa0/3            Root FWD 19        128.3    P2p






Added Ravindra Krishna at 09:49 0 comments
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TSHOOT : STP : Priority Change




















In the above network the switch 4 is now the root. I have changed the priority to 4096 for vlan 1.


Switch#show spanning-tree
VLAN0001
  Spanning tree enabled protocol ieee
  Root ID    Priority    4097
             Address     00D0.D312.ECD4
             This bridge is the root
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec

  Bridge ID  Priority    4097  (priority 4096 sys-id-ext 1)
             Address     00D0.D312.ECD4
             Hello Time  2 sec  Max Age 20 sec  Forward Delay 15 sec
             Aging Time  20

Interface        Role Sts Cost      Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Fa0/1            Desg FWD 19        128.1    P2p
Fa0/2            Desg FWD 19        128.2    P2p
Fa0/3            Desg FWD 19        128.3    P2p
Fa0/4            Desg FWD 19        128.4    P2p
Fa0/5            Desg FWD 19        128.5    P2p
Fa0/6            Desg FWD 19        128.6    P2p

How to change the priority?

Switch#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)#spanning-tree ?
  mode      Spanning tree operating mode
  portfast  Spanning tree portfast options
  vlan      VLAN Switch Spanning Tree
Switch(config)#spanning-tree vlan 1 priority 4096


Now question is why the port F0/1 on switch 3 is amber???



Added Ravindra Krishna at 08:31 0 comments
Labels:

Tuesday, 24 January 2012

STP: Understanding the basics of STP_chaging the interface speed




















As soon as I changed the speed, the cost of the path increased and thus the SWITCH4 (the middle one) ports are mostly amber.

Switch>en
Switch#conf t
Switch(config)#interface range f0/1 - 6

Switch(config-if-range)#speed ?
  10    Force 10 Mbps operation
  100   Force 100 Mbps operation
  auto  Enable AUTO speed configuration
Switch(config-if-range)#speed 10

Now the question is why the 2 O'Çlock interface is amber but the 12 O'Clock interface is green???


Added Ravindra Krishna at 10:42 3 comments
Labels:

STP: Understanding the basics of the STP



















Understand why the ports are green and amber. Remember that the order of values compared between BPDUs is:

  1. Root Bridge ID (= Priority + VLAN + MAC address)
  2. Total Root Path Cost
  3. Sending Bridge ID (= Priority + VLAN + MAC address)
  4. Sending Port ID (= Priority + Port index)
  5. Receiving Port ID (=Priority + Port index)

Post that follow will have the same scenario.

VTP is already running. Switch 5(12 o'clock) is the vtp server with domain CISCO and all other the clients. None are in transparent mode for now. 


question is based on the information above which one of these switches is the root??
Added Ravindra Krishna at 10:22 0 comments
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passed switch

I passes switch on 11 Jan with score of 945. Good one!

Now I will post the scenarios for the TSHOOT as i go along.
Added Ravindra Krishna at 10:02 0 comments
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