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Jerry - this is a great reference for the 3900 Token Ring Switch
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3920/ct3920ug/vlantut
.htm
TrBRF's are Token ring Bridge Relay Functions (bridges) and TrCRF's are
Token ring Concentrator Ring Functions... basically they're rings and
bridges. Since the 3920 is a switch, in order to make them unique, you
assign VLANs to the TrCRF's.
ring numbers are unique - bridge numbers are not.
hth
-e-
----- Original Message -----
From: "Jerry Seven" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, October 30, 2001 8:33 PM
Subject: SRB and 3920 questions, please help [7:24734]
> Hi,
>
> I have several Token ring switch questions:
>
> Router R1 has interface To0 connects to token ring network, and it's the
> only device on it besides 3920, on 3920 I configured the bridge number 1
and
> vlan 10 for TrBRF, ring number 2 and vlan 20 for TrCRF.
>
> Questions:
>
> 1) Why should I configure vlans for TrBRF and TrCRF, what are they for?
>
> 2) If I enable SRB on R1, what's the bridge number and ring number should
I
> choose in order to be consistent to 3920 configuration? Should I use
> different bridge ID and same ring ID as follows:
>
> source-bridge ring-group 100
> interface To0
> source-bridge 2 2 100
>
> Any help is greatly appreciated,
>
> J
>
>
>
>
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