Quick Reference Guide

PowerConnect B-Series TI24X Configuration Guide 297
53-1002269-02
Configuring 802.1Q-in-Q tagging
10
In Figure 69, 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 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
• Since the uplink (to the provider cloud) and the edge link (to the customer port) must have
different 802.1Q tags, make sure the uplink and edge link are in different port regions. Refer to
“Enabling or disabling the Spanning Tree Protocol (STP)” on page 175 for a list of valid port
regions.
• If you configure a port with an 802.1Q tag-type, the device automatically applies the 802.1Q
tag-type to all ports within the same port region. Likewise, if you remove the 802.1Q tag-type
from a port, the device automatically removes the 802.1Q tag-type from all ports within the
same port region.
• PowerConnect B-Series TI24X devices support one configured tag-type per port along with the
default tag-type of 8100. PowerConnect devices do not have the port region concept and do
not support tag-profile.
• 802.1Q-in-Q tagging and VSRP are not supported together on the same device.
Enabling 802.1Q-in-Q tagging
To enable 802.1Q-in-Q tagging, configure an 802.1Q tag on the untagged edge links (the customer
ports) to any value other than the 802.1Q tag for incoming traffic. For example, in Figure 70, 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 customer interface
Uplink to provider cloud
Untagged
Tagged
DA
SA
8100
Customer
VLAN
DA SA 8100
Customer
VLAN
Provider
VLAN
8100
Configured tag-type 9100
Default tag-type 8100
Provider Edge Switch