Thanks for the reply. Marc. I found the answer in chap11 on Jeff's book. Originally I thought IGRP cannot take any subnetted route like 172.16.1.0/24, it will only take route with classful boundary , in this case 172.16.0.0/16. From Chap11, it says if the IGRP interface is configured with /24, then it only accept /24 from other classless protocol, the example shows OSPF has 172.16.1.0/24, 172.16.10.0/28, IGRP will only redistribute the first one. not the one with /28.
When I did the config again on my router, it works. From routerB's routing table, I can see 172.16.1.0/24 I think the eigrp summary-address should be put on IGRP interface to redistribute it into IGRP . raymond "Marc Russell" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > This may be too simple an answer, but is the interface S0 on router A up? > Router A won't pass the route unless the interface is up. > > Also, why do you have "ip summary-address eigrp 1 172.16.1.0 255.255.255.0" > command on an interface that has EIGRP deactivited via the passive interface > comamnd. > > In addition, the summary address command doesn't summarize anything in this > case. > > Maybe I'm just consfused. Can you post configs and route tables from both > routers? > > > > Marc Russell > www.ccbootcamp.com > > > > > ""Raymond Cai"" wrote in message > [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > > Hi, > > > > I got a simple question on eigrp summary address. > > > > here is the senario: > > > > Serial0-----RouterA--Serial1--------------------Serial0--RouterB > > 172.16.1.1/24 172.16.25.1/24 172.16.25.2/24 > > > > RouterA: > > > > router eigrp 1 > > passive-interface s1 > > network 172.16.0.0 > > no auto-summary > > > > router igrp 1 > > passive-interface s0 > > network 172.16.0.0 > > > > int s1 > > ip summary-address eigrp 1 172.16.1.0 255.255.255.0 > > > > My question is : How come on routerB , I cannot see the route to > 172.16.1.0 > > , it only shows 172.16.0.0 as connected. > > > > This example is from Jeff Doyle's page 382. it shows the 172.16.1.0/24 can > > be redistributed into igrp . > > > > Your suggestion is greatly appreciated. > > > > Raymond Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=30506&t=30439 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
