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Cisco Systems IntelligentGigabit Ethernet Switch Modules for the IBM BladeCenter, Software Configuration Guide
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Chapter12 Configuring VLANs
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. You can use the show running-config vlan privileged EXEC command to
display the switch running configuration file. 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
determined as follows:
•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). The VTP and VLAN configurations in the startup configuration file
are used. The VLAN database revision number remains unchan ged 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 VLAN IDs use the VLAN
database information.
•If the VTP mode is server, the domain name and VLAN configuration for the first 1005 VLAN IDs
use the VLAN database information.
Caution If the VLAN database configuration is used at startup and the startup configuration file contains
extended-range VLAN configuration, this information is lost wh en the system boots up.
Default Ethernet VLAN Configuration
Table12-2 shows the default configuration for Ethernet VLANs.
Note The switch supports Ethernet interfaces exclusively. Because FDDI and Token Ring VLANs are not
locally supported, you only configure FDDI and Token Ring media-specific characteristics for VTP
global advertisements to other switches.
Table12-2 Ethernet VLAN Defaults and Ranges
Parameter Default Range
VLAN ID 1 (for the internal 100 Mbps
management module ports)
No range
2 (for the internal 1000 Mbps
ports and the external ports)
No range
VLAN name For VLAN 1: default
For VLAN 2: operational
No range
IEEE 802.10 SAID 100001 (100000 plus the
VLAN ID)
1 to 4294967294
MTU size 1500 1500 to 18190