Figure 5, Confi – Brocade Communications Systems Brocate Ethernet Access Switch 6910 User Manual
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Brocade 6910 Ethernet Access Switch Configuration Guide
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Configuring VLAN Translation
20
Default Setting
Disabled
Command Mode
Interface Configuration (Ethernet)
Command Usage
•
If the next switch upstream does not support QinQ tunneling, then use this command to map
the customer’s VLAN ID to the service provider’s VLAN ID for the upstream port. Similarly, if the
next switch downstream does not support QinQ tunneling, then use this command to map the
service provider’s VLAN ID to the customer’s VLAN ID for the downstream port. Note that one
command maps both the original-vlan to new-vlan for ingress traffic and the new-vlan to
original-vlan for egress traffic on the specified port.
For example, assume that the upstream switch does not support QinQ tunneling. If the
command switchport vlan-translation 10 100 is used to map VLAN 10 to VLAN 100 for
upstream traffic entering port 1, and VLAN 100 to VLAN 10 for downstream traffic leaving port
1, then the VLAN IDs will be swapped as shown below.
FIGURE 5
Configuring VLAN Translation
•
The maximum number of VLAN translation entries is 8 per port, and up to 96 for the system.
However, note that configuring a large number of entries may degrade the performance of
other processes that also use the TCAM, such as IP Source Guard filter rules, Quality of Service
(QoS) processes, QinQ, MAC-based VLANs, VLAN translation, or traps.
•
If VLAN translation is set on an interface with this command, and the same interface is also
configured as a QinQ access port with the
assignments will be determined by the QinQ process, not by VLAN translation.
Example
This example configures VLAN translation for Port 1 as described in the Command Usage section
above.
Console(config)#vlan database
Console(config-vlan)#vlan 10 media ethernet state active
Console(config-vlan)#vlan 100 media ethernet state active
Console(config-vlan)#exit
Console(config)#interface ethernet 1/1,2
Console(config-if)#switchport allowed vlan add 10 tagged
Console(config-if)#switchport allowed vlan add 100 tagged
Console(config-if)#interface ethernet 1/1
Console(config-if)#switchport vlan-translation 10 100
Console(config-if)#end
Console#show vlan-translation
Interface Old VID New VID
--------- ------- -------
Eth 1/ 1 10 100
1
2
(VLAN 10)
(VLAN 100)
(VLAN 100)
(VLAN 10)
upstream
downstream