Generic Example RBridge1 announces that it supports extensions B, C, and D. Per-RBridge IS-IS element has: Nickname Other Fields… RBridge2 supports and wishes to use extensions B and D in a frame to RBridge 1. Shim has: 0 1 1 1 0 0 0 0 A B C D E F G H Extension Flags RBridge2 Other, B&D flags Ext. B Data Ingress Egress Extensions Data RBridge1 Ext. D Data RBridge1: |