From: kym blair (kymblair@xxxxxxxxxxx)
Date: Sat Mar 23 2002 - 02:48:41 GMT-3
Ian,
If you have VLANs on your network, you may need to put this bridge (TrBRF)
and ring (TrCRF) in a specific VLAN. Since that wasn't mentioned in your
assignment, you can make up any VLAN number you want. What matters is
Bridge number (TrBRF) and Ring number (TrCRF). Your assignment was to put
both R1 and R2 on Ring 50. If your assignment was to put R1 and R2 on
different rings, you would create two TrCRFs and put them both under the
same parent TrBRF.
STEP 1: Create a VLAN and make it a TrBRF; set the TrBRF's Bridge number to
whatever you want (must be between 0x00 and 0x0F, i.e. Bridge 0 to 15; note
it is hex and zero works)
STEP 2: Create another VLAN (can be anything, but recommend you use "50")
and make it a TrCRF; set the TrCRF's Ring number to 0x32 (must be between
0x01 and 0xFFF); name the TrCRF "RING50". Make it's parent your TrBRF
STEP 3: Assign Port 1 and Port 2 both to TrCRF "RING50", which also puts
them under the TrBRF bridge you just created.
STEP 4: OPTIONAL IF VLANs MATTER: Enable Spanning Tree for the TrBRF
(select IBM or IEEE as instructed by scenario) and TrCRF (select IEEE or
CISCO as instructed)
HTH, Kym
>From: "Chua, Parry" <Parry.Chua@compaq.com>
>Reply-To: "Chua, Parry" <Parry.Chua@compaq.com>
>To: <Ian.C.Stong@mail.sprint.com>, <ccielab@groupstudy.com>
>Subject: RE: Cat 3920 configuration question
>Date: Sat, 23 Mar 2002 07:54:39 +0800
>
>All you need is just one TrBRF and one TrCRF, assign two ports to the
>TrCRF.
>
>Your bridge number don't seen right, bridge number is 1 to 15(hex 0xF), ie
>4 bit.
>The ring number is 12 bits (1-4095, or hex [1 to 0xFFF])
>
>When you create a TrBRF, assign a bridge number, I think the default is
>15(0xF).
>WHen create a TrCRF, assign a ring number and attach to TrBRF. Now it look
>like a
>SRB with a ring attach to a bridge.
>
>The default work because, it is a deafult ring attach to a default bridge
>and all ports are assign to the default ring.
>
>In real world, we always use decimal, when setup in Cat39xx, you have to
>convert to hex
>for bridge number and ring number.
>
>Regards
>Parry
>-----Original Message-----
>From: Ian.C.Stong@mail.sprint.com [mailto:Ian.C.Stong@mail.sprint.com]
>Sent: Saturday, March 23, 2002 3:40 AM
>To: ccielab@groupstudy.com
>Subject: Cat 3920 configuration question
>
>
>I have a scenario with 2 token ring interfaces off two separate routers
>and a 3920.
>
>Router A - Ring 50 Router B - Ring 50 Both connected to port 1
>& 2 on 3920
>
>Using default 3920 config I can ping between each router to the other
>router. After configuration I am unable to ping between routers.
>
>I configured 3920 by creating a CrBRF with id of VLAN50 and bridge
>number of 50
>Then configured CrCRF 1 and CrCRF 2 with CrBRF VLAN50 as the parent.
>Also assigned port 1 to CrCRF 1 and port 2 to CrCRF 2.
>
>Left everything else default - including ring number set to auto, etc.
>On the routers I only configured an IP address and ring speed on the
>token ring int's.
>
>What else is needed? Do I need to change the switch from SRB to SRT
>since no workstations to create RIF's? Do I need to change the ring
>setting on the switch from auto to the actual ring number of 50? Do I
>need to configure sour bridge ring group on the token ring interface?
>
>
>As a side question - I read on CCO that the 3920 CRF and BRF numbers are
>in hex format. So if I have bridge 50 (decimal) shouldn't I configure
>the switch with a value of 0x32 (yet on the router I would assign it
>decimal 50?) Also same for ring numbers such that ring 50 decimal =
>switch 0x32 ring number and router 50 decimal)...
>
>
>Thanks in advance,
>
>Ian
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