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7.10.1. Auto-derivation from the Ethernet Tag ID

7.10.1. Auto-derivation from the Ethernet Tag ID​

For the "Unique VLAN EVPN" scenario, it is highly desirable to auto-derive the RT from the Ethernet Tag ID (VLAN ID) for that EVPN instance. The procedure for performing such auto-derivation is as follows:

  • The Global Administrator field of the RT MUST be set to the Autonomous System (AS) number with which the PE is associated.

  • The 12-bit VLAN ID MUST be encoded in the lowest 12 bits of the Local Administrator field, with the remaining bits set to zero.

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