RIP filtering using Prefix list

From: vignesh sethuraman (sethuvignesh@yahoo.co.in)
Date: Thu Jan 10 2008 - 09:04:27 ARST


Hello Experts,
   
  I have 2 Routers R4 and R5 connected via framerelay. I created 2 loopbacks in every router. I configured rip and i want the network 14.1.1.0 in R5 to be filtered out while sending out to R4. The issue is the another network13.1.1.0/24 is also getting filtered out. I used prefix list for filtering and i configured permit 0.0.0.0/32 along with the deny 14.1.1.0/24. Here is my config
   
  R4:
  interface Loopback0
 ip address 10.1.1.1 255.255.255.0
interface Loopback1
 ip address 11.1.1.1 255.255.255.0
  interface Serial1/0
 ip address 12.1.1.1 255.255.255.0
 encapsulation frame-relay
 frame-relay map ip 12.1.1.2 405 broadcast
  router rip
 version 2
 network 10.0.0.0
 network 11.0.0.0
 network 12.0.0.0
 no auto-summary
   
  R5:
   
  interface Loopback0
 ip address 13.1.1.1 255.255.255.0
interface Loopback1
 ip address 14.1.1.1 255.255.255.0
  interface Serial1/1
 ip address 12.1.1.2 255.255.255.0
 encapsulation frame-relay
 frame-relay map ip 12.1.1.1 504 broadcast
  router rip
 version 2
 network 12.0.0.0
 network 13.0.0.0
 network 14.0.0.0
 distribute-list prefix rip out
 no auto-summary
  ip prefix-list rip seq 5 deny 14.1.1.0/24
ip prefix-list rip seq 10 permit 0.0.0.0/32
   
  Here is my routing table o/p
   
  R4:
  Rack1R4#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
       10.0.0.0/24 is subnetted, 1 subnets
C 10.1.1.0 is directly connected, Loopback0
     11.0.0.0/24 is subnetted, 1 subnets
C 11.1.1.0 is directly connected, Loopback1
     12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, Serial1/0
   
  R5:
  Rack1R5(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
         10.0.0.0/24 is subnetted, 1 subnets
R 10.1.1.0 [120/1] via 12.1.1.1, 00:00:09, Serial1/1
     11.0.0.0/24 is subnetted, 1 subnets
R 11.1.1.0 [120/1] via 12.1.1.1, 00:00:09, Serial1/1
     12.0.0.0/24 is subnetted, 1 subnets
C 12.1.1.0 is directly connected, Serial1/1
     13.0.0.0/24 is subnetted, 1 subnets
C 13.1.1.0 is directly connected, Loopback0
     14.0.0.0/24 is subnetted, 1 subnets
C 14.1.1.0 is directly connected, Loopback1
   
  Could you please kindly help me
   
  Thanks,
  Vignesh
   
   
   
   

       
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