Brocade Communications Systems Brocate Ethernet Access Switch 6910 - Manual (Page 442)

392 Brocade 6910 Ethernet Access Switch Configuration Guide
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Configuring IEEE 802.1Q Tunneling
20
7. Verify configuration settings.
Console#show dot1q-tunnel service
802.1Q Tunnel Service Subscriptions
Port Match C-VID S-VID
-------- ----------- -----
Eth 1/ 1 10 100
Eth 1/ 1 20 200
Eth 1/ 1 30 300
Step 2. Configure Switch C.
1. Create VLAN 100, 200 and 300.
Console(config)#vlan database
Console(config-vlan)#vlan 100,200,300 media ethernet state active
2. Configure port 1 and port 2 as tagged members of VLAN 100, 200 and 300.
Console(config)#interface ethernet 1/1,2
Console(config-if)#switchport allowed vlan add 100,200,300 tagged
switchport dot1q-tunnel tpid
This command sets the Tag Protocol Identifier (TPID) value of a tunnel port. Use the no form to
restore the default setting.
Syntax
switchport dot1q-tunnel tpid tpid
no switchport dot1q-tunnel tpid
tpid – Sets the ethertype value for 802.1Q encapsulation. This identifier is used to select a
nonstandard 2-byte ethertype to identify 802.1Q tagged frames. The standard ethertype
value is 0x8100. (Range: 0800-FFFF hexadecimal)
Default Setting
0x8100
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
• Use the switchport dot1q-tunnel tpid command to set a custom 802.1Q ethertype value on the
selected interface. This feature allows the switch to interoperate with third-party switches that
do not use the standard 0x8100 ethertype to identify 802.1Q-tagged frames. For example,
0x1234 is set as the custom 802.1Q ethertype on a trunk port, incoming frames containing
that ethertype are assigned to the VLAN contained in the tag following the ethertype field, as
they would be with a standard 802.1Q trunk. Frames arriving on the port containing any other
ethertype are looked upon as untagged frames, and assigned to the native VLAN of that port.
The specified ethertype only applies to ports configured in Uplink mode using the switchport
dot1q-tunnel mode command. If the port is in normal mode, the TPID is always 8100. If the
port is in Access mode, received packets are processes as untagged packets.