Brocade Multi-Service IronWare Switching Configuration Guide (Supporting R05.6.00) - Manual (Page 216)

186 Multi-Service IronWare Switching Configuration Guide
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Configuring 802.1q-in-q tagging
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In Figure 16 , the untagged ports (to customer interfaces) accept frames that have any 802.1Q tag
other than the configured tag-type 9100. These packets are considered untagged on this incoming
port and are re-tagged when they are sent out of the uplink towards the provider. The 802.1Q
tag-type on the uplink port is 8100, so the Brocade device will switch the frames to the uplink
device with an additional 8100 tag, thereby supporting devices that only support this method of
VLAN tagging.
Configuration rules
Follow the rules below when configuring 802.1q-in-q tagging:
• The Brocade device supports per port tag-type configuration. Consequently, each port can
have its own tag-type setting.
• The default tag-type for a port is 8100.
• The Brocade device supports 802.1q-in-q tagging where the inner and outer tag can have
different or same tag-type values. This feature maximizes interoperability with third-party
devices.
Enabling 802.1Q-in-Q tagging
To enable the 802.1Q-in-Q feature, configure an 802.1Q tag type on the untagged edge links (the
customer ports) to any value other than the 802.1Q tag for incoming traffic.
For example, in Figure 15 , the 802.1Q tag on the untagged edge links (ports 11 and 12) is 9100,
whereas, the 802.1Q tag for incoming traffic is 8100.
To configure 802.1 Q-in-Q tagging as shown in Figure 15 , enter commands such as the following on
the untagged edge links of devices C and D.
Brocade(config)# tag-type 9100 e 3/1 to 3/2
Syntax: [no] tag-type num [ethernet slot-number/port-number [to slot-number/port-number]]
The num parameter specifies the tag-type number and can be a hexadecimal value from 0 - ffff.
The default is 8100.
The ethernet port number to port number parameter specifies the ports that will use the defined
802.1Q tag. This parameter operates with the following rules:
• If you do not specify a port or range of ports, the 802.1Q tag applies to all Ethernet ports on the
device.