From: ccie2be (ccie2be@nyc.rr.com)
Date: Tue Aug 23 2005 - 12:32:51 GMT-3
Hi guys,
I can't figure this out.
I have 3 rip talking routers on 192.10.1.0/24.
BB2
|
------------------------------------- 192.10.1.0/24
| |
R2 R3
s0/0 ---------------- s0/1.302 (148.1.0.0/24)
R2 is learning of other rip routes via it's serial S0/0 F/R interface and is
passing those routes to R3 via s0/0.
Split horizon is disabled on R2's s0/0 interface.
BB2 is advertising rip routes onto the ethernet segment and md5 authen is
configured on all ethernet interfaces.
I'm trying to filter all rip routes from just BB2 and have the following
config's on R2 and R3:
R2
R2(config-router)#do f router rip
router rip
version 2
passive-interface Loopback0
network 148.1.0.0
network 150.1.0.0
network 192.10.1.0
distribute-list prefix DENY-BB2 gateway BB2-ip in Ethernet0/0
no auto-summary
!
ip prefix-list BB2-ip seq 5 permit 192.10.1.254/32
!
ip prefix-list DENY-BB2 seq 10 deny 0.0.0.0/0 le 32
R3
R3(config-router)#do f router rip
router rip
version 2
network 148.1.0.0
network 150.1.0.0
network 192.10.1.0
distribute-list prefix DENY-BB2 gateway BB2-ip in Ethernet0/1
no auto-summary
!
ip prefix-list BB2-ip seq 5 permit 192.10.1.254/32
!
ip prefix-list DENY-BB2 seq 5 deny 0.0.0.0/0 le 32
Here's my problem:
Before I configured the filter on R2 and R3, R3 was learning rip routes from
R2 via both the serial link and the ethernet link.
But, after I configured and applied the distribute list, R3 was only
learning routes via the serial link. I did some debugging and
found that R2 stopped sending out rip updates it's ethernet interface.
Can anyone explain why that is?
TIA, Tim
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