From: Thomas Alexander (talexander1@xxxxxxxxxxxxx)
Date: Fri Jan 14 2000 - 20:03:53 GMT-3
Atif,
The problem is that no bridging in configured on Router_C.
Briding on WAN usually goes in pairs, ie both sides of a WAN link should be
configured for bridging. In your case, only routerB serial 0 is configured
for bridging.
I have done a quick test in my lab, and ofcourse there is no problem for a
IPX/RIP
traffic originating from rtr A as it gets bridged from Router B and gets
forwarded to
Router C. Router B since it has bridging enable on S0, will forward the
bridged packet to Router C.
I am not sure how Router C accepts the bridge packet, may be it can support
both bridge and routed
packets. But when IPX/RIP traffic orignates from Rtr C, RTR B is expecting a
bridged packet, instead
received a normal packet to be routed, and it drops the packets. This can be
confirmed if you do a
"show bridge verbose". Under Flood ports, you will see zero bridged packets
as being received from
Router C. If the connection to router C were to be Ethernet (or LAN) like
router a, this would would just
work fine. So for example:
Router_A(et0/0) --- (etH0)Router_B(s0) --- (s1)Router_X---(eth0)Routerc
IPX routing TB
TB IPX routing
The other option is to enable IRB on Router C, so that it bridges IPX on the
serial
interface to routerB and routes from all other interfaces.
Hope this helps..
Thomas Alexander
----- Original Message -----
From: "Atif Awan" <atifawan@hotmail.com>
To: <ccielab@groupstudy.com>
Sent: Saturday, December 23, 2000 10:06 AM
Subject: IPX bridging problem
>
> i was working ipx ( my weak spot :) ) when i encountered a strange problem
> that i cannot seem to solve. The relevant setup is like this :
>
> Router_A(ether0/0) --- (ether0)Router_B(serial0) --- (serial1)Router_C
>
> All the 3 routers are routing IP. Router_A and Router_C have ipx routing
> turned on too but Router_B does not have ipx routing turned on. Router_A's
> ethernet0/0 and Router_C's serial 1 both have the same IPX network number.
> Router_B has bridge-group 1 statements on both ether0 and serial 0.
>
> IPX RIP routes from Router_A are seen successfully in the ipx routing
table
> of Router_C. However, updates from Router_C are not reaching Router_A.
When
> i turn on debugging on Router_C it says that it is broadcasting updates
out
> serial 1 but these never reach Router_A. I dont think i need IRB anywhere
> here ... why is this happening that one way traffic is going through
> successfully and the other way its not ??? Rest assured there are no IPX
> access-lists anywhere ...
>
> TIA
> Atif Awan
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