From: Cox, Bryan (bryan.cox@xxxxxxxxxxxxxx)
Date: Tue Sep 04 2001 - 11:35:18 GMT-3
Ademola,
Yes-- I tried it both ways. Here is the reason why as I understand it. The
port of each router is in a different CrF and therefore has a different ring
# associated to it. The two rings are joined by a SRB in the form of the
TrBrf. Since by default the Cisco router does not create RIFs for routable
protocols, like IP, the frames are not able to be source route bridged.
When I changed each CrF bridge mode to SRT no RIFs are necessary and I was
able to remove the multiring ip command from the T/R interfaces. Now the
frames were transparently bridged.
Bryan
-----Original Message-----
From: Ademola Osindero [mailto:ademolaosindero@yahoo.com]
Sent: Tuesday, September 04, 2001 3:35 AM
To: Cox, Bryan; ccielab@groupstudy.com
Subject: RE: 3920 Token Ring Switch Question
But do you reallly need multiring all?
--- "Cox, Bryan" <bryan.cox@avistacorp.com> wrote:
> Neil,
>
> I mocked up the config in my lab--I had to do the
> following. I defined
> everything just as you had on the 3920 except that I
> made sure the ring #s
> on the two CRFs were different. (The 3920 wouldn't
> allow them to be the
> same anyway.) The CRF adjacent to R1 below had a
> ring # 20 assigned to it.
> The CRF adjacent to r4 had ring # 21 assigned to it.
> The pertinent portion
> of the configs follows:
>
>
> Here was my topology:
>
> r1--3920--r4
>
> R1's config:
>
> interface TokenRing0/0
> ip address 10.1.1.1 255.255.255.0
> no ip directed-broadcast
> ring-speed 16
> multiring ip
>
> R4's config:
>
> interface TokenRing0/0
> ip address 10.1.1.2 255.255.255.0
> no ip directed-broadcast
> ring-speed 16
> multiring ip
>
> Anyway with hard coded ring #s and setting the TrBRF
> in SRB mode this worked
> fine.
>
> Regards,
>
> Bryan
>
>
> -----Original Message-----
> From: Neil Garcia Legada [mailto:nlegs@visto.com]
> Sent: Sunday, September 02, 2001 8:04 PM
> To: kgalusha@cisco.com; ccielab@groupstudy.com;
> jkesemey@bellsouth.net
> Subject: RE: 3920 Token Ring Switch Question
>
>
> Hi Kyle,
>
> I also tried that same config that you have below.
> Still didnt work.
>
> I would greatly appreciate it if you could give some
> feedback when you
> tested the same setup as mine in your lab. I only
> rented an online rack to
> play around with 3920.
>
>
> Thanks very much.
> Neil
>
>
> -----Original Message-----
> From: Kyle Galusha kgalusha@cisco.com
> Sent: Sun, 02 Sep 2001 11:30:02 -0500
> To: nlegs@visto.com
> Subject: RE: 3920 Token Ring Switch Question
>
>
> did you try assigning a ring number to the 3900
> instead of using auto
> mode? Do the router show a ring number? I know
> I've seen mismatches
> when the ring numbers where different., But that was
> when I had srb also
> configed on the router interface like this
> source-bridge ring-group 100
> Inter to0
> source-route 5 1 100
> If the 3900 is attached to to0 it should see ring 5
> I believe. I'll try it
> in the lab later today.
> Kyle
>
> At 03:15 AM 9/2/2001 -0700, you wrote:
> >Hi Andy,
> >
> >Thanks.
> >
> >I tried that one but it didnt work.
> >
> >
> >Regards,
> >Neil
> >
> >
> >
> >-----Original Message-----
> >From: andrew.waldwyn@bt.com
> >Sent: Sun, 2 Sep 2001 09:51:04 +0100
> >To: nlegs@visto.com, ccielab@groupstudy.com
> >Subject: RE: 3920 Token Ring Switch Question
> >
> >
> >Neil,
> >
> >Try "multiring ip" under your token ring
> interfaces.
> >The problem is that the router is sending the IP
> packets without RIF. As
> the
> >catalyst is configured to do SRB between both VLANs
> it will drop all the
> >frames that don't carry the RIF.
> >
> >Regards
> >
> >Andy
> >
> >-----Original Message-----
> >From: Neil Garcia Legada [mailto:nlegs@visto.com]
> >Sent: 02 September 2001 06:58
> >To: ccielab@groupstudy.com
> >Subject: 3920 Token Ring Switch Question
> >
> >
> >Hello Group,
> >
> >Below are my configurations on cat3920. Routers are
> attached using ports as
> >per the CDP info. TrBRF's were defined with
> corresponding TrCRF's under it.
> >Ports are then assigned to TrCRF's accordingly.
> >
> >When SRB bridging mode is used on TrCRF's, why is
> it that ping from r3 to
> r8
> >is unsuccessful ??? But when I changed the bridging
> mode to SRT I was able
> >to ping r8 from r3. Is there a way to make it work
> using SRB on TrCRF's ???
> >I'm kind of confuse about those bridging mode.
> >
> >Appreciate any feedback.
> >
> >
> >Thanks,
> >Neil
> >
> >
> >*******
> >
> > VTP VLAN Configuration
> >
> > TrBRF/TrCRF ID
> Brdg/Rng Ports Local
> >State
> > TrBRF100 100
> 0x01
> >preferred
> > TrCRF10 10
> auto yes
> >preferred
> > TrCRF11 11
> auto yes
> >preferred
> > TrBRF200 200
> 0x01
> >preferred
> > TrCRF20 20
> auto yes
> >preferred
> > trbrf-default 1005
> 0x0F
> >preferred
> > trcrf-default 1003
> 0xCCC yes
> >preferred
> >
> >
> > Local VLAN Port
> Configuration
> >
> >Port Mode TrCRF
> TrBRF
> > 3 Static TrCRF10
> TrBRF100
> > 8 Static TrCRF11
> TrBRF100
> > 13 Static TrCRF20
> TrBRF200
> >
> >
> > CDP Neighbor Display
> >
>
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