From: Sam Munzani (sam@xxxxxxxxxxx)
Date: Wed Aug 09 2000 - 12:29:01 GMT-3
Hi Phil,
What does following command do in that case?
router ospf 1
summary address xxx.xxx.xxx.xxx
I had same problem with OSPF routes not showing up in IGRP because IGRP was
on /24 mask and ospf was /28 mask. I used summary address command under OSPF
and then redistribution started showing all routes in IGRP.
On the same token,
what is you opinion about using TAGs with route maps to avoid loops in
redistribution? I checked a scenario of EIGRP tag switching with RIP
redistribution with route map and seems pretty good. What is more efficient?
Route TAGs with route maps during redistribution of distribution lists?
Sam
> Phil,
> RIP is a FLSM protocol, therefore, in the same major network
> (172.17.0.0/16), R2 will only send R7 routes with the same mask as the
> interface, which is /24. To get around this you can either re-address the
> ospf space to use a different major network so a summary is sent, you can
> generate a default and send that, or (the easiest way) is to use rip
> verision 2, which supports VLSM.
>
> Bill Dicks
> CCIE #6081
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Philip lai
> Sent: Monday, August 07, 2000 11:34 AM
> To: ccielab@groupstudy.com
> Cc: philip.lai@ncr.com
> Subject: ospf rip redistribution
>
> ospf rip redistribution
>
> R3--Fr--R2--|--R7
> ospf rip
>
> R3 s0.1 172.17.95.1/30
> R2 s0.1 172.17.95.2/30
> R2 lo 172.17.2.2/24
> R2 e0 172.17.10.240/24
> R7 eo 172.17.10.241/24
>
> I was trying to redistribute ospf into rip. Since the mask on R2 e0 is
> 24 bit,
> I would like to summarize it before sending into rip.
>
> In R2, I use summary address on ospf.
>
> router ospf 1
> summary-address 172.17.0.0 255.255.0.0
> network 172.17.95.2 0.0.0.0 area 64
> network 172.17.2.2 0.0.0.0 area 64
> !
> router rip
> redistribute ospf 1
> passive-interface Serial0.1
> network 172.17.0.0
> default-metric 1
>
> r2#sh ip route
> Gateway of last resort is not set
>
> 172.17.0.0/16 is variably subnetted, 5 subnets, 3 masks
> C 172.17.10.0/24 is directly connected, Ethernet0
> O 172.17.0.0/16 is a summary, 00:09:47, Null0
> C 172.17.2.0/24 is directly connected, Loopback0
> C 172.17.95.0/30 is directly connected, Serial0.1
> O 172.17.95.4/30 [110/128] via 172.17.95.1, 00:03:25, Serial0.1
>
> That was great. A summary address 172.17.0.0/16 was appear. However,
> when I
> look at routing table of R7. This route do not come out.
>
> r7#sh ip route
> C
> Gateway of last resort is not set
>
> 172.17.0.0/24 is subnetted, 2 subnets
> C 172.17.10.0 is directly connected, Ethernet0/0
> R 172.17.2.0 [120/1] via 172.17.10.240, 00:00:09, Ethernet0/0
>
> When I try debug ip rip at R2, only 172.17.2.0 are send to R7.
> Anybody know what is wrong with the config ? If I need to send a summary
> route
> to R7. Is that any other way to do it ? Any suggestion are appreciated.
>
> Rdgs,
> Philip
>
> r2(config-if)#
> 00:14:27: RIP: sending v1 update to 255.255.255.255 via Loopback0
> (172.17.2.2) -
> suppressing null update
> 00:14:28: RIP: sending v1 update to 255.255.255.255 via Ethernet0
> (172.17.10.240)
> 00:14:28: subnet 172.17.2.0, metric 1
> 00:14:28: RIP: sending v1 update to 255.255.255.255 via Loopback0
> (172.17.2.2)
> 00:14:28: subnet 172.17.10.0, metric 1
>
>
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