From: Igor Manassypov (imanassypov@rogers.com)
Date: Mon Aug 11 2008 - 22:45:15 ART
Here it goes, its a bit long but simple. I realize there are other options for accomplishing this, however I am puzzled why this setup is not working as expected. Out of curiosity, on a different testbench I setup a mirrored route-map from rip to ospf redistribution allowing just the summary, and that worked perfectly. I am wondering if RIP is behaving differently with route-maps?!!
Router R1 is connected to BB1. R1 is running both ospf and rip, and BB1 is running only rip.
Here is the config on R1:
router rip
version 2
redistribute ospf 77 metric 1 route-map OSPF->RIP
passive-interface default
network 150.1.0.0
neighbor 150.1.1.254
no auto-summary
router ospf 77
router-id 77.77.1.1
log-adjacency-changes
area 167 virtual-link 77.77.7.7
redistribute rip subnets route-map RIP->OSPF
network 77.77.1.1 0.0.0.0 area 1
network 77.77.12.1 0.0.0.0 area 1
network 77.77.17.1 0.0.0.0 area 167
network 77.77.21.1 0.0.0.0 area 1
neighbor 77.77.21.2
neighbor 77.77.12.2
ip prefix-list SUMMARY seq 5 permit 77.0.0.0/8
ip prefix-list SUMMARY seq 10 deny 0.0.0.0/0 le 32
route-map OSPF->RIP permit 10
match ip address prefix-list SUMMARY
route-map OSPF->RIP deny 20
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
77.0.0.0/8 is variably subnetted, 20 subnets, 3 masks
C 77.77.1.0/24 is directly connected, Loopback0
O IA 77.77.3.0/24 [110/76] via 77.77.17.7, 04:53:48, Ethernet0/0
O IA 77.77.4.0/24 [110/13] via 77.77.17.7, 04:53:48, Ethernet0/0
O IA 77.77.5.0/24 [110/13] via 77.77.17.7, 04:53:48, Ethernet0/0
O 77.77.6.0/24 [110/12] via 77.77.17.7, 04:53:48, Ethernet0/0
O 77.77.7.0/24 [110/11] via 77.77.17.7, 04:53:48, Ethernet0/0
O 77.77.8.0/24 [110/12] via 77.77.17.7, 04:53:48, Ethernet0/0
O 77.77.9.0/24 [110/12] via 77.77.17.7, 04:53:48, Ethernet0/0
O 77.77.10.0/24 [110/12] via 77.77.17.7, 04:53:48, Ethernet0/0
C 77.77.12.0/30 is directly connected, Serial1/0
C 77.77.17.0/24 is directly connected, Ethernet0/0
C 77.77.21.0/30 is directly connected, Serial1/1
O IA 77.77.28.0/24 [110/12] via 77.77.17.7, 04:53:49, Ethernet0/0
O 77.77.33.0/24 [110/11] via 77.77.17.7, 04:53:49, Ethernet0/0
O IA 77.77.36.0/24 [110/75] via 77.77.17.7, 04:53:49, Ethernet0/0
O 77.77.44.0/24 [110/11] via 77.77.17.7, 04:53:49, Ethernet0/0
O IA 77.77.48.0/24 [110/12] via 77.77.17.7, 04:53:49, Ethernet0/0
O IA 77.77.58.0/24 [110/12] via 77.77.17.7, 04:53:49, Ethernet0/0
O 77.77.67.0/24 [110/11] via 77.77.17.7, 04:53:49, Ethernet0/0
O IA 77.0.0.0/8 [110/11] via 77.77.17.7, 04:53:49, Ethernet0/0
R 199.172.0.0/24 [120/1] via 150.1.1.254, 00:00:06, Ethernet0/1
150.100.0.0/24 is subnetted, 1 subnets
R 150.100.1.0 [120/1] via 150.1.1.254, 00:00:06, Ethernet0/1
150.1.0.0/24 is subnetted, 1 subnets
C 150.1.1.0 is directly connected, Ethernet0/1
150.250.0.0/24 is subnetted, 1 subnets
R 150.250.1.0 [120/1] via 150.1.1.254, 00:00:06, Ethernet0/1
150.200.0.0/24 is subnetted, 1 subnets
R 150.200.1.0 [120/1] via 150.1.1.254, 00:00:06, Ethernet0/1
BB1#sh ip route rip
77.0.0.0/8 is variably subnetted, 20 subnets, 3 masks
R 77.77.1.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.3.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.4.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.5.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.6.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.7.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.8.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.9.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.10.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.12.0/30 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.17.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.21.0/30 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.28.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.33.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.36.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.44.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.48.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.58.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.77.67.0/24 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
R 77.0.0.0/8 [120/1] via 150.1.1.77, 00:00:01, Ethernet0/0
Hong Chan <howard.chan34@gmail.com> wrote: I don't see any wrong with your configuration but the config can be simpler.
For me, I won't use prefix list to deny the route but let the statement "route-map OSPF->RIP deny 20" to filter the routes.
Pleae provide the show ip route in the rip & full configuration of the router to let us to see which router redistribute the ospf route into rip domain
2008/8/12 Huan Pham <Huan.Pham@peopletelecom.com.au>
I do not see any problem with your config.
Please try "clear ip ospf process" on the router that do redistribution,
to force the router to refresh routing table, and to apply the
route-map.
It worked for me in similar cases. Let me know if that works for you.
Alternatively, you can you "distribute-list out interface" under the RIP
to filter traffic you send to the other RIP neighbor, and the interface
command "ip summary-address rip 77.0.0.0 255.0.0.0" to create summary
route.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Igor Manassypov
Sent: Tuesday, 12 August 2008 5:17 AM
To: ccielab@groupstudy.com
Subject: ospf->rip redistribution filtering with RR
Hi Gang,
Can someone please help me out with this scenario:
- i have an ospf-rip redistribution, where ospf runs over my 77.x.x.x
network with a bunch of routes. I am trying to create a summary within
ospf, and redistribute only that summary to my rip process on same
router by means of a route map like follows:
router rip
version 2
redistribute ospf 77 metric 1 route-map OSPF->RIP passive-interface
default network 150.1.0.0 neighbor 150.1.1.254 no auto-summary
ip prefix-list SUMMARY seq 5 permit 77.0.0.0/8 ip prefix-list SUMMARY
seq 10 deny 0.0.0.0/0 le 32 !
route-map OSPF->RIP permit 10
match ip address prefix-list SUMMARY
route-map OSPF->RIP deny 20
After redistribution, within rip I still get the complete routing info
coming from ospf. Why would the above RR not stop the more specifics?!
Thanks!!
Igor M., M.Eng, P.Eng
Network Architect
Blogs and organic groups at http://www.ccie.net
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