From: Jim Ayers (jayers@xxxxxxxxx)
Date: Thu Aug 19 1999 - 16:26:36 GMT-3
Ed/Dave,
Yes, you are right; the map statements fixed it fine.
I was working through examples in a book and just couldn't get this one to work
properly.
Thanks.
Jim.
At 09:37 PM 8/18/1999 -0400, David Oakman wrote:
>Jim,
> Try this on R0 or R4
> Sho fr map
> clear FR
> Sho fr map
>
> you should lose connectivity to your hub from the spoke.
> This is a classic Inverse arp issue like ed had stated. What will hap
pen at the lab is the proctor would reboot one of your routers (R0/R4) and your
network would no longer work.
>
> I am not certain why the additional dlci's would cause a problem on t
he hub. I would add the additional frame frlay map statements on the spokes and
then see if the problem still exisits.
>
>What does a debug ip packet show (on both sides) ?
>
>ttfn
>daveo
>
>
>
>-----Original Message-----
>From: Jim Ayers [SMTP:jayers@cisco.com]
>Sent: Wednesday, August 18, 1999 7:28 PM
>To: Edward Ruszkiewicz; ccielab@groupstudy.com
>Subject: RE: FR Question
>
>Edward,
>
>Thanks. I know I can use a fr map for R4, but I don't think it's necessary.
In fact, as long as the switch announces only the two required PVCs then the in
arp works just fine as can be seen below:
>
>r4#sh fr map
>Serial0 (up): ip 132.10.64.1 dlci 114(0x72,0x1C20), dynamic,
> broadcast,, status defined, active
>Serial0 (up): ip 132.10.64.2 dlci 111(0x6F,0x18F0), dynamic,
> broadcast,, status defined, active
>
>The problem is when the switch announces more than one dlci; The two spokes
can no longer ping each other.
>
>Any other ideas.
>
>Jim.
>
>
>At 12:38 PM 8/18/1999 -0500, Edward Ruszkiewicz wrote:
> >You should use a frame relay map statement for R4 on each spoke. Inv-arp is
> >disabled per dlci per protocol with a static mapping. It may remain for
> >awhile, until cache cleared. I'm not certain about your extra dlci question?
> >
> >-----Original Message-----
> >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> >Jim Ayers
> >Sent: Wednesday, August 18, 1999 11:44 AM
> >To: ccielab@groupstudy.com
> >Subject: FR Question
> >
> >
> >The topology:
> >
> >R0 --------------|
> > ____|_____
> > | fr switch |---------- R4
> > |_________|
> > |
> >R3 --------------|
> >
> >where R0, R3 are spokes; R4 is the hub
> >
> >Relevant Configs:
> >
> >R0:
> >interface Serial0
> > ip address 132.10.64.2 255.255.255.0
> > encapsulation frame-relay
> > frame-relay map ip 132.10.64.1 101 broadcast
> >
> >R3:
> >interface Serial0
> > ip address 132.10.64.1 255.255.255.0
> > encapsulation frame-relay
> > frame-relay map ip 132.10.64.2 121 broadcast
> >
> >R4:
> >interface Serial0
> > ip address 132.10.64.3 255.255.255.0
> > encapsulation frame-relay
> >
> >Problem: The above works fine (ie all routers can ping each other) provide
> >the FR switch only announces the minimum number of necessary DLCIs. As soon
> >as the switch is configured to announce "extra" DLCIs, the two spokes can
> >not ping each other.
> >
> >Question: Why does this happen and how to fix it?
> >
> >
> >Thanks. It's got to be something simple that I'm missing. All my other FR
> >configs work fine.
> >
> >
> >
> >
This archive was generated by hypermail 2.1.4 : Thu Jun 13 2002 - 08:21:47 GMT-3