RE: RIP offset list question

topology is as follows:

BB1---R1----FR p2p-----R2
                        | |
                        | |
                        | |
                        | |
                        |------R4

BB1 connected with ethernet interface to R1
R4 and R2 are connected with R1 (p2p FR link)

Ethernet link between R2 and R4 is irrelevant for this task. My questions it
is more related to how subnet and it mask is selected from the route table to
include in ACLs on R1 router.

> Date: Sun, 11 Oct 2009 11:47:46 +0100
> Subject: Re: RIP offset list question
> From: kranderiya_at_googlemail.com
> To: khalid_khursheed_at_hotmail.com
> CC: ccielab_at_groupstudy.com
>
> Hi Syed,
>
> Please confirm topology as below:
> Topology:
>
> |------ R2
> | \
> | \
> BB1 --- R1-- FR p2p --R4
>
>
> Your prefix coming from R1hub to R2 spoke and R4 spoke. R2 and R4 have
> connection via Ethernet. Set offset-list to R2 FR link as 13.
> Hope this will solve.
>
> Cheers,
> Kaushik
>
> 2009/10/11 Syed Khalid Ali <khalid_khursheed_at_hotmail.com>:
> > I have the following scenario (from Narbik Workbook):
> > |--- R2
> > |
> > BB1 --- R1-- FR p2p --R4
> > IP addresses are as follows:
> > BB1 fa0/0: 131.1.111.111/24
> > R1 fa0/0: 130.1.111.111/24
> > R1 ser2/0.14: 131.1.14.1/24
> > R4: ser2/0.14: 131.1.4.4/24
> >
> > R1 configuration:
> > ip access-list standard bb1-routes
> > permit 107.1.1.0 0.0.0.127
> > !
> > router rip
> > version 2
> > no validate-update-source
> > offset-list bb1-routes out 14 Serial2/0.14
> > network 130.1.0.0
> > network 131.1.0.0
> > distribute-list prefix bb1-prefixes gateway bb1-source in
FastEthernet0/0
> > !
> > R1 has the following routes (learned from BB1) that need to advertised to
R4
> > such that R4 should not advertise to its neighbor routers:
> >
> > show ip route | begin Gateway
> > Gateway of last resort is 131.1.12.2 to network 0.0.0.0
> > 109.0.0.0/22 is subnetted, 1 subnets
> > R 109.1.4.0 [120/1] via 131.1.111.111, 00:00:26
> > 107.0.0.0/25 is subnetted, 1 subnets
> > R 107.1.1.0 [120/1] via 131.1.111.111, 00:00:18
> > 104.0.0.0/11 is subnetted, 1 subnets
> > R 104.0.0.0 [120/1] via 131.1.111.111, 00:00:18
> > 105.0.0.0/14 is subnetted, 1 subnets
> > R 105.0.0.0 [120/1] via 131.1.111.111, 00:00:18
> > R* 0.0.0.0/0 [120/1] via 131.1.12.2, 00:00:06, Serial2/0.12
> >
> > After setting this configuration 107.1.1.0 should be advertised to R4
with
> > metric=14. But when I check the route table of R4, this 107.0.0.0/8 is
still
> > there reachable with metric=1
> >
> > If I change the access list with 107.0.0.0 0.0.0.127, R1 start
advertising
> > with metric=14 and therefore R4 has this route with metric=15 in it route
> > table.
> >
> > I need explanation from expert on this group.
> >
> >
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Received on Sun Oct 11 2009 - 17:00:59 ART