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Catalyst 6500 Series Switch Software Configuration Guide—Release 8.7
OL-8978-04
Chapter 11 Configuring VLANs
Configuring Token Ring VLANs on the Switch
Token Ring VLAN Configuration Guidelines
This section describes the guidelines for creating or modifying the Token Ring VLANs:
•
For the Token Ring VLANs, the default TrBRF (VLAN 1005) can only be the parent of the default
TrCRF (VLAN 1003). You cannot specify the default TrBRF as the parent of a user-configured
TrCRF.
•
You must configure a TrBRF before you configure the TrCRF; that is, the parent TrBRF VLAN you
specify for the TrCRF must already exist.
•
In a Token Ring environment, the logical ports of the TrBRF (the connection between the TrBRF
and the TrCRF) are placed in a blocked state if either of these conditions exists:
–
The TrBRF is running the IBM STP, and the TrCRF is in SRT mode.
–
The TrBRF is running the IEEE STP, and the TrCRF is in SRB mode.
Creating or Modifying a Token Ring TrBRF VLAN
You must enable VTP version 2 before you create the Token Ring VLANs. For information on enabling
VTP version 2, see
Chapter 10, “Configuring VTP.”
You must specify a bridge number when you create a new TrBRF.
To create a new Token Ring TrBRF VLAN, perform this task in privileged mode:
This example shows how to create a new Token Ring TrBRF VLAN and verify the configuration:
Console> (enable)
set vlan 999 name TrBRF_999 type trbrf bridge a
Vlan 999 configuration successful
Console> (enable)
show vlan 999
VLAN Name Status IfIndex Mod/Ports, Vlans
---- -------------------------------- --------- ------- ------------------------
999 TrBRF_999 active
VLAN Type SAID MTU Parent RingNo BrdgNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ ------ ---- -------- ------ ------
999 trbrf 100999 4472 - - 0xa ibm - 0 0
VLAN AREHops STEHops Backup CRF
---- ------- ------- ----------
Console> (enable)
To modify the VLAN parameters on an existing Token Ring TrBRF VLAN, perform this task in
privileged mode:
Task
Command
Step 1
Create a new Token Ring TrBRF-type VLAN.
set vlan
vlan
[
name
name
]
type trbrf
[
said
said
]
[
mtu
mtu
]
bridge
bridgeber
[
stp
{
ieee
|
ibm
}]
Step 2
Verify the VLAN configuration.
show vlan
[
vlan
]
Task
Command
Step 1
Modify an existing Token Ring TrBRF-type
VLAN.
set vlan
vlan
[
name
name
] [
state
{
active
|
suspend
}]
[
said
said
] [
mtu
mtu
] [
bridge
bridgeber
]
[
stp
{
ieee
|
ibm
}]
Step 2
Verify the VLAN configuration.
show vlan
[
vlan
]
