From: Jonathan V Hays (jhays@xxxxxxxx)
Date: Wed Jul 10 2002 - 17:03:52 GMT-3
Thanks, Emmanuel and Landon.
I don't think that's the problem. I still think the problem is on the
3920. When I put both ports back in trcrf-default (VLAN 1003), which is
in SRB mode, I can start pinging between the routers almost immediately
without using a multiring command on the routers.
However, I verified that each newly-created TrCRF was indeed in SRB
mode, so I added "multiring all" on both router to0 interfaces and put
each ports back into its own TrCRF. Once again I cannot ping. This does
not fix the problem.
Here's the pertinent config info:
The Statistics > Port Status page for the ports is as follows:
-----------
3 trcrf-default trbrf-default Yes Yes 16 HDX port
Cut-Thru
8 trcrf-default trbrf-default Yes Yes 16 HDX port
Cut-Thru
-----------
VTP VLAN Configuration
TrBRF/TrCRF ID Brdg/Rng Ports
Local State
BRF100 100 0x01
preferred
CRF3 3 auto yes
preferred
CRF8 8 auto yes
preferred
trbrf-default 1005 0x0F
preferred
trcrf-default 1003 auto yes
preferred
-----------
Local VLAN Port Configuration
Port Mode TrCRF TrBRF
3 Static CRF3 BRF100
8 Static CRF8 BRF100
-----------
I've seen several lab scenarios that call for putting each token ring
port in its own TrCRF. Has anyone out there got this working?
Any other ideas?
Jonathan
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Landon Fitts
Sent: Wednesday, July 10, 2002 11:58 AM
To: Jonathan V Hays; ccielab@groupstudy.com
Subject: Re: 3920 TrBRF won't bridge ? HELP!
Jonathon,
Are you configured for SRB or SRT on the 3920? If configured for SRB,
I believe that you have to configure "multiring IP" on the router TR
interafaces when you have multiple TrCRFs configured under one TrBRF.
Regards,
Landon
----- Original Message -----
From: "Jonathan V Hays" <jhays@jtan.com>
To: <ccielab@groupstudy.com>
Sent: Wednesday, July 10, 2002 2:08 PM
Subject: 3920 TrBRF won't bridge ? HELP!
> Hi Everyone,
>
> I'm having trouble getting a newly created TrBRF on a 3920 to bridge
> traffic between two child TrCRF's - each TrCRF being on a separate
> port. I think I'm missing something.
>
> I'm on a remote rack today and my plan was to spend most of the day on
> the 3920, the ATM, and voice and here I am still stuck on the 3920.
> I've worked with Cisco routers and switches for many years (including
> two and a half years at a Cisco reseller) but I have never seen a
> 3920.
>
> I *have* read some of Cisco's 3920 docs and I have just now re-read
> Appendix A, "Catalyst 3920 VLAN Tutorial" which walks you through a
> simple TrCRF and TrBRF config.
>
> The details:
>
> I assigned IP addresses to tokenRing 0 on routers R3 and R8
> (38.3.3.3/8 38.8.8.8/8). BEFORE I configured the switch I was able to
> ping between the routers. I created a new TrBRF (BRF100, VLAN=100,
> Bridge 0x1) and gave it address 38.1.1.1/8. I could also ping this
> address from the routers.
>
> AFTER I put each port in its own virtual ring (TrCRF) and made BRF100
> the parent of each TrCRF I could no longer ping. Why?
>
> My understanding is that the newly created TrBRF (BRF100) is supposed
> to bridge traffic among all its child TrCRFs but it's not doing it. I
> reset NVRAM on the 3920 and tried it again with the same results.
>
> According to the bottom of page A-4 Appendix A of the Catalyst 3920
> Token Ring Switch User Guide (Ver 4.1): "Frames can be switched
> between ports within a single TrCRF. As shown in Figure A-1, multiple
> TrCRFs can be interconnected using a single Token Ring Bridge Relay
> Function (TrBRF)."
>
> As a troubleshooting step, I then created a new TrCRF (CRF10) which
> also has BRF100 as its parent and changed all the ports to be in that
> new TrCRF, instead of each port in its own TrCRF. Once more ping was
> successfull. But this isn't surprising since all ports are in the same
> virtual ring and they don't need the TrBRF anyway. It seems like I am
> missing a step to get the TrBRF to bridge traffic.
>
> [I hadn't planned to spend this much time on the 3920, but I guess
> I've got something to learn here].
>
> What am I missing?
>
> Thanks in advance,
>
> Jonathan
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