Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 584)

560 Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide
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Local VLL
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Under this configuration, a router can receive packets with a two tags on one endpoint and forward
them to the Local VLLs other endpoint either untagged, tagged with a single tag or tagged with an
inner and outer VLAN tag. Where dual-tagging is used within a Local VLL, the system allocates an
Internal Lookup Indentifier (IFL-ID) for the Local VLL instance.
In Figure 63 the Local VLL named “Test2” contains Ethernet ports 1/1 and 2/1. Port 1/1 is a
member of VLAN 100 and is configured to accept packets with an inner VLAN tag value of 300.
Port 2/1 is a member of VLAN 200. Because both ports belong to Local VLL “Test2” traffic tagged
with outer VLAN tag 100 and inner VLAN tag 300 is able to reach nodes within VLAN 200 and
traffic tagged with VLAN 200 is able to reach nodes within VLAN 100. Traffic that ingresses on port
1/1 must have an outer tag with the value “100” and an inner tag with the value “300” and
egresses on port 2/1 with a tag value of “200”. Traffic that ingresses on port 2/1 must have a tag
with the value “200” and egresses on port 1/1 with an inner tag value of “100” and an outer tag
value of “300”.