From: Erick B. (erickbe@xxxxxxxxx)
Date: Tue Jul 30 2002 - 23:54:59 GMT-3
Tim,
I don't see whats not working. You have a 24.0.0.0
network off of R6 and R5 is learning this via RIP.
Thats all fine if R6 has 24.0.0.0 in RIP config or as
a RIP learned route.
--- "Ouellette, Tim" <tim.ouellette@eds.com> wrote:
> Team,
>
> after reading some interesting documents on Cisco. I
> "discovered" the "ip
> broadcast-address" command. I instantly though of
> "NBMA broadcast issues".
> I thought this command would be usefull. I did use
> plain ethernet in the
> following scenario just to test but I would think it
> would work in other
> scenarions.
>
> Here's the scenarion. R5 has some other network
> "hanging" off it,
> including 192.168.1.0/24, 10.1.1.0/24 and R6 has
> 24.0.0.0/8 off of it.
>
> Rather than have r6 broadcast to 255.255.255.255 on
> the ethernet segment, I
> issued a "ip broadcast-address 172.16.51.1" which is
> more of a unicast type
> packet but I figured that the R5 would take this
> update without a problem.
>
> R5 (.1)----------172.16.56.0/30 --------------(.2)
> R6
>
> r6(config)#int e0
> r6(config-if)#ip broadcast-address 172.16.56.1 ?
> <cr>
>
> r6(config-if)#ip broadcast-address 172.16.56.1
> r6#
> %SYS-5-CONFIG_I: Configured from console by
> consolesh ip int e0
> Ethernet0 is up, line protocol is up
> Internet address is 172.16.56.2/30
> Broadcast address is 172.16.56.1
> Address determined by setup command
> MTU is 1500 bytes
> <snip>
>
> r6#
> IP: s=172.16.56.2 (local), d=172.16.56.1
> (Ethernet0), len 25, sending
> broad/mult
> icast UDP src=520, dst=520
>
> As you can see, R6 is sending the update to
> 172.16.56.1 which is the ip
> address of the e0 interface of r5.
>
> However, r5 isn't liking the update and the routing
> table looks like the
> following.
>
> r5#r
> Codes: C - connected, S - static, I - IGRP, R - RIP,
> M - mobile, B - BGP
> D - EIGRP, EX - EIGRP external, O - OSPF, IA
> - OSPF inter area
> N1 - OSPF NSSA external type 1, N2 - OSPF
> NSSA external type 2
> E1 - OSPF external type 1, E2 - OSPF external
> type 2, E - EGP
> i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS
> level-2, ia - IS-IS inter
> area
> * - candidate default, U - per-user static
> route, o - ODR
> P - periodic downloaded static route
>
> Gateway of last resort is not set
>
> 172.16.0.0/30 is subnetted, 1 subnets
> C 172.16.56.0 is directly connected,
> Ethernet0/0
> R 24.0.0.0/8 [120/1] via 172.16.56.2, 00:01:54,
> Ethernet0/0
> 10.0.0.0/24 is subnetted, 1 subnets
> C 10.1.1.0 is directly connected, Loopback1
> C 192.168.1.0/24 is directly connected, Loopback0
> r5#
>
>
>
> Does anyone have any ideas?
>
> Tim
This archive was generated by hypermail 2.1.4 : Sat Sep 07 2002 - 19:36:49 GMT-3