Vlan Default Configuration; Vlan Configuration Guidelines; Configuring Vlans - Cisco WS-C4003 - Catalyst 4000 Chassis Switch Software Configuration Manual

Chapter 10

Configuring VLANs

VLAN Default Configuration

Table 10-1
Table 10-1 VLAN Default Configuration
Feature
Native (default) VLAN
Port VLAN assignments
VLAN state
MTU size
SAID value
Pruning eligibility

VLAN Configuration Guidelines

Follow these guidelines when creating and modifying VLANs in your network:
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The Catalyst 4000 family switch 10/100 Ethernet switching modules support auxiliary VLANs in
Note
software release 5.5(1) and later. You can plug an externally powered IP phone into a 10/100 port and
then add that port to an auxiliary VLAN using the set port auxiliaryvlan command. For complete details
on configuring auxiliary VLANs, refer to the "Configuring a Voice-over-IP Network" chapter in the
Catalyst 6000 Family Software Configuration Guide.
Configuring VLANs
These sections describe how to configure VLANs:
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78-12647-02
shows the default VLAN configuration.
A maximum of 1000 VLANs can be active at any time.
Before you can create a VLAN, the switch must be in VTP server mode or VTP transparent mode.
If the switch is a VTP server, you must define a VTP domain. For information on configuring VTP,
refer to Chapter 9, "Configuring VTP."
The VLAN numbers are always ISL VLAN identifiers and not 802.1Q VLAN identifiers.
Creating or Modifying an Ethernet VLAN, page 10-4
Assigning Switch Ports to a VLAN, page 10-4
Mapping 802.1Q VLANs to ISL VLANs, page 10-5
Clearing 802.1Q-to-ISL VLAN Mappings, page 10-6
Deleting a VLAN, page 10-7
Software Configuration Guide—Catalyst 4000 Family, Catalyst 2948G, Catalyst 2980G, Releases 6.3 and 6.4
Default Value
VLAN 1
All ports assigned to VLAN 1
Enabled
1500 bytes
100,000 plus the VLAN number (for example, the SAID
for VLAN 3 is 100003)
VLANs 2–1000 are pruning eligible
VLAN Default Configuration
10-3