Distribute-list gateway issue

Hello everyone

Topology :
R1 (F0/0) 172.29.1.2/30 ----> 172.29.1.1/30 (F0/0) R2 (F1/0)
172.30.1.1/30------> 172.30.1.2/30 (F0/0) R3

lo0:1.1.1.1.30 RIP lo0:
2.2.2.2/30 RIP lo0:3.3.3.1/30
lo1:1.1.1.5/30 lo1:
2.2.2.6/30 lo1:3.3.3.5/30
lo2:10.10.10.10
lo2:20.20.20.20 lo2:30.30.30.30
lo3:100.100.100.100
lo3:200.200.200.200 lo3:223.1.1.1
lo4:3.3.3.9/30

I am trying to block from R3 to R2 the prefix 3.0.0.0/8
I am succeeding by the command -> distribute-list prefix DENY_3 in
FastEthernet1/0

ip prefix-list DENY_3 seq 5 deny 3.0.0.0/8 le 32
ip prefix-list DENY_3 seq 10 permit 0.0.0.0/0 le 32
!
ip prefix-list NOT_FROM_R3 seq 5 deny 172.30.1.2/32
ip prefix-list NOT_FROM_R3 seq 10 permit 0.0.0.0/0 le 32

but when I try with another command -> distribute-list prefix DENY_3
gateway NOT_FROM_R3 in

it blocked 3.0.0.0/8 from R1 and R3
and blocked all the routes from R3.

Why is that ?

Blogs and organic groups at http://www.ccie.net
Received on Mon May 25 2009 - 20:40:40 ART