From: Connary, Julie Ann (jconnary@xxxxxxxxx)
Date: Tue Jan 16 2001 - 15:26:13 GMT-3
Hi Yan,
Can't point the default there - as that route comes from R4 - so it would
just be recursive.
Julie Ann
At 01:15 PM 1/16/2001 -0500, you wrote:
>Network that you select as default has to be in your downstream neighbor
>routing table or it will no install it. You are correct about everything
>else. Also, if running old code 11.0 and below make sure IP Classless is on.
>Try pointing default network to 205.15.150.0 on R5.
>
>Yan
>
>
> -----Original Message-----
> From: Connary, Julie Ann [mailto:jconnary@cisco.com]
> Sent: Tuesday, January 16, 2001 1:00 PM
> To: ccielab@groupstudy.com
> Subject: propagating default-networks - RIP V2 and
>IGRP -
>
> Hi All,
>
> I know there have been many discussions on this - but what I
>don't
> understand is how to get IGRP to propagate a
>default-network. I understand
> the defualt-network has to point to a network that is not in
>the same
> address space as IGRP and it must be classfull.
> But why does it not propagate to downstream neighbors?
>
> Here is the scenario - R5 is redistributing from IGRP into
>OSPF and RIP V2
> into OSPF. I do not want
> to redistribute OSPF into IGRP or RIP V2 - but use a
>default-network instead.
>
>
>
> R7---Rip V2
> |
> |E 0 - 170.100.42.241/28
> |
> R5 -------- S0.2 ------------R3 -----s0
> ------------------r6-------205.0.5.0 AND non 24 bit 170.100
>networks off of R6
> | 170.100.65.0/24 170.100.68.0/24
> | OSPF
> |
> |
> S0.1 - igrp - 170.100.1.0/24
> |
> R4
>
>
> So, I put in R5 the following command:
>
> ip default-network 205.0.5.0
>
> and I got a gateway of last resort in R5. (I also tried
>setting the ip
> default-network to 170.100.65.0, but that just installed a
>static route and
> no gateway of last resort). However IGRP is not propagating
>this default to
> R4. Is this because 205.0.5.0 is an OSPF learned
> route? R4 has no knowledge of the 210.0.5.0 network -
>however, I thought
> that R5 would source down
> to R4 that it had a default and R4 would have a gateway of
>last resort to
> R5. R7, the Rip V2 router does receive the default network
>and it points it
> toward R5. Am I missing something here?
>
> Here is my routing table:
>
> Gateway of last resort is 170.100.65.3 to network 210.0.5.0
>
> 170.100.0.0/16 is variably sub
> 01netted, 13 subnets, 3 masks
> I 170.100.200.0/24 [100/8576] via 170.100.1.4,
>00:00:50, Serial0.1
> C 170.100.42.240/28 is directly connected, Ethernet0
> O IA 170.100.233.1/32 [110/75] via 170.100.65.2,
>00:25:04, Serial0.2
> O IA 170.100.233.0/24 [110/65] via 170.100.65.3,
>00:25:04, Serial0.2
> O E2 170.100.129.0/24 [110/20] via 170.100.65.2,
>00:25:04, Serial0.2
> O E2 170.100.150.0/24 [110/20] via 170.100.65.3,
>00:25:04, Serial0.2
> O IA 170.100.68.0/24 [110/128] via 170.100.65.3,
>00:25:04, Serial0.2
> O IA 170.100.67.6/32 [110/129] via 17:05:06:
>%SYS-5-CONFIG_I: Configured
> from
> console by console0.100.65.3, 00:25:04, Serial0.2
> C 170.100.66.0/28 is directly connected, BRI0
> O IA 170.100.64.0/24 [110/74] via 170.100.65.2, 00:25:04,
>Serial0.2
> [110/74] via 170.100.65.3,
>00:25:04, Serial0.2
> C 170.100.65.0/24 is directly connected, Serial0.2
> C 170.100.1.0/24 is directly connected, Serial0.1
> O 170.100.42.0/24 is a summary, 00:25:01, Null0
> R 1.0.0.0/8 [120/1] via 170.100.42.242, 00:00:10,
>Ethernet0
> R 20.0.0.0/8 [120/1] via 170.100.42.242, 00:00:10,
>Ethernet0
> O*E2 210.0.5.0/24 [110/20] via 170.100.65.3, 00:25:07,
>Serial0.2
> I 205.15.150.0/24 [100/14000] via 170.100.1.4, 00:00:54,
>Serial0.1
>
> Here is the routing table on R4
>
> Gateway of last resort is not set
>
> 170.100.0.0/24 is subnetted, 3 subnets
> C 170.100.200.0 is directly connected, Ethernet0
> I 170.100.65.0 [100/10476] via 170.100.1.5, 00:01:13,
>Serial0
> C 170.100.1.0 is directly connected, Serial0
> 1.0.0.0/24 is subnetted, 1 subnets
> C 1.1.1.0 is directly connected, Loopback0
> B 205.15.150.0/24 [20/0] via 170.100.200.7, 00:36:34
>
>
>
> Also - does anyone understand how to use the
>defualt-information command
> under igrp?
> It says it requires an access-list - but the examples in the
>docs do not
> use access-lists.
>
> Thanks,
>
> Julie Ann
>
>------------------------------------------------------------------------
> Julie Ann Connary
> | | Network Consulting
>Engineer
> ||| ||| Federal Support
>Program
> .|||||. .|||||. 13635 Dulles
>Technology Drive,
> Herndon VA 20171
> .:|||||||||:.:|||||||||:. Pager:
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> c i s c o S y s t e m s Email: jconnary@cisco.com
>
>
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>
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