Propagate-Tc - Edge-Core ECS4810-12M Layer 2 Management Manual

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Console(config-erps)#non-revertive

Console(config-erps)#

This command enables propagation of topology change messages for a

propagate-tc

secondary ring to the primary ring. Use the no form to disable this feature.

[no] propagate-tc

ERPS Configuration

When a secondary ring detects a topology change, it can pass a

message about this event to the major ring. When the major ring

receives this kind of message from a secondary ring, it can clear the

MAC addresses on its ring ports to help the secondary ring restore its

connections more quickly through protection switching.

When the MAC addresses are cleared, data traffic may flood onto the

major ring. The data traffic will become stable after the MAC addresses

are learned again. The major ring will not be broken, but the bandwidth

of data traffic on the major ring may suffer for a short period of time

due to this flooding behavior.

condition. If it is an R-APS (NR, RB) message without a DNF

indication, all Ethernet Ring Nodes flush their FDB. This action

unblocks the ring port which was blocked as a result of an

operator command.

Recovery with non-revertive mode is handled in the following way:

The RPL Owner Node, upon reception of an R-APS (NR) message

and in the absence of any other higher priority request does not

perform any action.

Then, after the operator issues the

RPL Owner Node, this ring node blocks the ring port attached to

the RPL, transmits an R-APS (NR, RB) message over both ring

ports, informing the ring that the RPL is blocked, and flushes its

The acceptance of the R-APS (NR, RB) message triggers all ring

nodes to unblock any blocked non-RPL which does not have an

SF condition. If it is an R-APS (NR, RB) message without a DNF

indication, all ring nodes flush their FDB. This action unblocks

the ring port which was blocked as result of an operator

| ERPS Commands

command at the

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