Specifications

7-5
Cisco MWR 2941 Mobile Wireless Edge Router Release 3.5 Software Configuration Guide, Cisco IOS Release 15.1(3)MR
OL-26895-01
Chapter 7 Configuring VLANs
Creating and Modifying VLANs
Creating and Modifying VLANs
You use VLAN configuration mode, accessed by entering the vlan global configuration command to
create VLANs and to modify some parameters. You use the interface configuration mode to define the
port membership mode and to add and remove ports from VLANs. The results of these commands are
written to the running-configuration file, and you can display the file by entering the
show running-config privileged EXEC command.
These sections contain VLAN configuration information:
• Default Ethernet VLAN Configuration, page 7-5
• VLAN Configuration Guidelines, page 7-6
• Creating or Modifying an Ethernet VLAN, page 7-7
• Assigning Static-Access Ports to a VLAN, page 7-8
• Creating an Extended-Range VLAN with an Internal VLAN ID, page 7-9
For more efficient management of the MAC address table space available on the switch, you can control
which VLANs learn MAC addresses by disabling MAC address learning on specific VLANs. See the
“Managing the MAC Address Table” section on page 12-1 for more information.
Default Ethernet VLAN Configuration
The switch supports only Ethernet interfaces. Table 7-2 shows the default configuration for Ethernet
VLANs.
Note On extended-range VLANs, you can change only the MTU size and the UNI-ENI VLAN configuration.
All other characteristics must remain at the default conditions.
Table 7-2 Ethernet VLAN Defaults and Ranges
Parameter Default Range
VLAN ID 1 1–4094
Note Extended-range VLANs (VLAN
IDs 1006 to 4094) are not saved in
the VLAN database.
VLAN name VLANxxxx, where xxxx
represents four numeric digits
(including leading zeros) equal
to the VLAN ID number
No range
IEEE 802.10 SAID 100001 (100000 plus the
VLAN ID)
1–4294967294
MTU size 1500 1500–9198
Translational bridge 1 0 0–1005
Translational bridge 2 0 0–1005