Cisco Systems EA6500 Manual De Usuario

Follow these guidelines and restrictions when creating and modifying VLANs in your network:

Supervisor engine redundancy does not support nondefault VLAN data file names or locations. Do 
not enter the vtp file file_name command on a switch that has a redundant supervisor engine.

RPR+ redundancy (see 

does not support a configuration entered in VLAN database mode. Use global configuration mode 
with RPR+ redundancy. 

You can configure extended-range VLANs only in global configuration mode. You cannot configure 
extended-range VLANs in VLAN database mode. See the 

.

The Cisco IOS end command is not supported in VLAN database mode.

You cannot enter Ctrl-Z to exit VLAN database mode.

Catalyst 6500 series switches do not support Token Ring or FDDI media. The switch does not 
forward FDDI, FDDI-Net, TrCRF, or TrBRF traffic, but it can propagate the VLAN configuration 
through VTP.

In a Token Ring environment, the logical interfaces (the connection between the TrBRF and the 
TrCRF) of the TrBRF 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.

Before installing a redundant supervisor engine, enter the no vtp file command to return to the 
default configuration.

Before you can create a VLAN, the Catalyst 6500 series switch must be in VTP server mode or VTP 
transparent mode. For information on configuring VTP, see 

The VLAN configuration is stored in the vlan.dat file, which is stored in nonvolatile memory. You 
can cause inconsistency in the VLAN database if you manually delete the vlan.dat file. If you want 
to modify the VLAN configuration or VTP, use the commands described in this guide and in the 
Catalyst 6500 Series Switch Cisco IOS Command Reference publication.

To do a complete backup of your configuration, include the vlan.dat file in the backup.

MTU size

VTPv1 1500; VTPv2 4472

1500–18190

Bridge number

1

0–15

STP type

ibm

auto, ibm, ieee

VLAN state

active

active, suspend