Saving Vlan Configuration; Default Ethernet Vlan Configuration - Cisco WS-C3750-48PS-S Software Configuration Manual

Configuring Normal-Range VLANs

Saving VLAN Configuration

The configurations of VLAN IDs 1 to 1005 are always saved in the VLAN database (vlan.dat file). If
VTP mode is transparent, they are also saved in the switch running configuration file and you can enter
the copy running-config startup-config privileged EXEC command to save the configuration in the
startup configuration file. In a switch stack, the whole stack uses the same vlan.dat file and running
configuration. To display the VLAN configuration, enter the show vlan privileged EXEC command.
When you save VLAN and VTP information (including extended-range VLAN configuration
information) in the startup configuration file and reboot the switch, the switch configuration is selected
as follows:
•
•
•
If the VLAN database configuration is used at startup and the startup configuration file contains
Caution
extended-range VLAN configuration, this information is lost when the system boots up.

Default Ethernet VLAN Configuration

Table 13-2
The switch supports Ethernet interfaces exclusively. Because FDDI and Token Ring VLANs are not
Note
locally supported, you only configure FDDI and Token Ring media-specific characteristics for VTP
global advertisements to other switches.
Table 13-2 Ethernet VLAN Defaults and Ranges
Parameter
VLAN ID
VLAN name
802.10 SAID
MTU size
Catalyst 3750 Switch Software Configuration Guide
13-8
If the VTP mode is transparent in the startup configuration, and the VLAN database and the VTP
domain name from the VLAN database matches that in the startup configuration file, the VLAN
database is ignored (cleared), and the VTP and VLAN configurations in the startup configuration
file are used. The VLAN database revision number remains unchanged in the VLAN database.
If the VTP mode or domain name in the startup configuration does not match the VLAN database,
the domain name and VTP mode and configuration for the first 1005 VLANs use the VLAN
database information.
If VTP mode is server, the domain name and VLAN configuration for the first 1005 VLANs use the
VLAN database information
shows the default configuration for Ethernet VLANs.
Default
1
VLANxxxx, where xxxx
represents four numeric digits
(including leading zeros) equal
to the VLAN ID number
100001 (100000 plus the
VLAN ID)
1500
Chapter 13
Range
1 to 4094.
Note Extended-range VLANs (VLAN
IDs 1006 to 4094) are not saved in
the VLAN database.
No range
1–4294967294
1500–18190
Configuring VLANs
78-16180-02