Nortel Networks OPTera Metro 3500 - Manual (Page 54)

2-16 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
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Step Action
9 Node 3 receives the ‘ Bridged’ status indication from Node 4. Node 3 enters
into the ‘ Bridged and Switched’ state. Traffic received on the protection
channels are then routed as if they were received from the failed working link.
Node 4 then sends a message to Node 3 indicating that it has entered into
the ‘
Bridged and Switched’ state.
• source node (Node 3)
• destination node (Node 4)
• type of switch request (Signal Degrade)
• path direction (Long)
• node status (’ Bridged and Switched’)
Note: Depending on the cross-connects provisioned, Node 3 will then either
drop traffic at the add/drop multiplexer or route traffic back out onto the
working channels of the ring.
10 Switch is complete.
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