From: kym blair (kymblair@xxxxxxxxxxx)
Date: Sun Jun 10 2001 - 10:15:41 GMT-3
Reference: Fatkid 360 intermediate redistribution; RIP and IGRP are being
mutually redistributed on two routers.
The goal: allow IGRP to redistribute it's own routes into RIP, but prevent
IGRP from redistributing routes it learned from RIP back to RIP (because
IGRP's lower administrative distance would make it the preferred direction
for packets going to RIP networks).
Solution: on the two routers that are doing mutual redistribution,
(1) redistribute all IGRP routes into RIP (no distribute-list)
(2) redistribute RIP into IGRP, but use a distribute-list to deny the
redistribution of RIP's own networks into IGRP and only allow the
redistribution of IGRP's own networks back into IGRP:
router rip
redistribute igrp 1 metric 2
network 204.1.3.0
network 204.1.4.0
network 204.1.5.0
(NOTE: RIP area also has networks .2 and .6 on other routers)
!
router igrp 1
redistribute rip metric 64000 10 255 1 1500
network 204.1.5.0
network 204.1.8.0
distribute-list 1 in
(NOTE: IGRP area also has network .7)
!
access-list 1 deny 204.1.2.0
access-list 1 deny 204.1.3.0
access-list 1 deny 204.1.4.0
access-list 1 deny 204.1.6.0
access-list 1 permit any
(NOTE: not denying .5 because it is on both RIP and IGRP)
This works, but seems backwards to me; seems like we should redistribute all
RIP routes into IGRP but block the return of these routes from IGRP back
into RIP; someone please explain. Thanks. Kym
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 10:31:21 GMT-3