Zte ZXR10 2900E series Configuration Manual page 160

ZXR10 2900E Series Configuration Guide
Step
3
SJ-20130731155059-002|2013-11-27 (R1.0)
Command
set zesr ctrl-vlan <1-4094>
ZXR10(config)#
level <1-2> seg <1-10> role {edge-assistant |
edge-control}{edge-port <port>| edge-trunk
<trunkId>}
set zesr ctrl-vlan <1-4094>
ZXR10(config)#
major-level preforward <10-600>[preup <
0-500>]
set zesr ctrl-vlan <1-4094> level
ZXR10(config)#
<1-2> seg <1-10> preforward <10-600>[ preup
<0-500>]
Function
Configures a node as an edge assistant
node or an edge control node on a
secondary ring.
Configures the preforward time and the
preup time for a node on the primary
ring.
The default value for the preforward time
is 10 seconds, and the default value for
the preup time is 0 second.
The configuration of the preforward time
and the preup time is required to satisfy
the following condition: preforward >
preup + link recovery time (10 seconds).
Configures the preforward time and the
preup time for a node on a secondary
ring.
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The preforward time: takes effect
during link failure recovery. During
the failure recovery, the faulty port
still remains blocked for some
time for the master node to block
the secondary port first to avoid
temporary loops.
After the master node blocks
the secondary port, it will inform
the node where the faulty port is
located to unblock the faulty port
immediately. If the node where
the faulty port is located does not
receive any notification from the
master node, the faulty port will
unblock itself when the preforward
time expires.
The preup time: takes effect during
link failure recovery. During the
failure recovery, the master node
waits for the preup time before it
blocks the secondary port again,
to prevent the ring state from
repeatedly switching due to the