802.1ad tagging configuration

802.1ad tagging provides finer granularity for configuring 802.1Q tagging, enabling you to configure 802.1Q tag-types on a group of ports. This feature allows you to create two identical 802.1Q tags (802.1ad tagging) on a single device. This enhancement improves SAV interoperability between RUCKUS devices and other vendors’ devices that support the 802.1Q tag-types, but are not very flexible with the tag-types they accept.

Note: RUCKUS devices treat a double-tagged Ethernet frame as a Layer 2 only frame. The packets are not inspected for Layer 3 and Layer 4 information, and operations are not performed on the packet utilizing Layer 3 or Layer 4 information.

The following figure shows an example application with 802.1ad tagging.

Figure 1. 802.1ad configuration example

In the above figure, 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 RUCKUS 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.