From: Marc La Porte (marc.a.laporte@gmail.com)
Date: Mon Feb 25 2008 - 17:58:20 ARST
Hi experts!
A couple questions about RIP:
1. Is there still RIPv1 on the lab?
2. If it says to configure RIPv2 is it then implicit to configure "no
auto-summary"?
Scenario:
f0/0 (VLAN_C)
|
fa0/0 (VLAN_A) --- R1 --- serial --- R3 --- serial --- R2 --- fa0/0 (VLAN_B)
VLAN_A: 1.0.0.0/8
VLAN_B: 2.0.0.0/8
VLAN_C: 3.0.0.0/8
Serial (R1-R3): 13.0.0.0/8
Serial (R2-R3): 23.0.0.0/8
R3 should not advertise the route for VLAN B to R1 nor should it advertise
the route for VLAN A to R2...
My solution on R3:
router rip
distribute-list 1 out serial 1/2 <--- direction of R2
distribute-list 2 out serial 1/1 <--- direction of R1
!
access-list 1 deny 1.0.0.0 0.255.255.255
access-list 1 permit any
!
access-list 2 deny 2.0.0.0 0.255.255.255
access-list 2 permit any
IE Solution on R3:
router rip
distribute-list prefix ONLY_VLAN_C out
!
ip prefix-list ONLY_VLAN_C seq 5 permit 3.0.0.0/8
Conclusion: I think my solution is better as it stops the advertisement of
VLAN_A and VLAN_B, but still advertises the subnets of the serial links. The
IE solutions doesn't do that... so I feel they filter more than requested...
Appreciate your input on both the questions and the scenario...
Marc
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