From: Atif Awan (atifawan@xxxxxxxxxxx)
Date: Sun Dec 24 2000 - 01:33:19 GMT-3
Well definitely router B is the culprit in this case but why this odd
behaviour and why do you say that it is a requirement for WAN interfaces
that bridging should be enabled on both ends ?
this is confsing .. i will try it with configuring IRB on Router_C but even
if it works there has to be a logical explanation for this anomaly in the
bridge's behaviour.
Atif
>From: "Thomas Alexander" <talexander1@austin.rr.com>
>Reply-To: "Thomas Alexander" <talexander1@austin.rr.com>
>To: "Atif Awan" <atifawan@hotmail.com>, <ccielab@groupstudy.com>
>Subject: Re: IPX bridging problem
>Date: Fri, 14 Jan 2000 17:03:53 -0600
>
>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
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:26:10 GMT-3