Zte ZXR10 2910E-PS Configuration Manual page 178

ZXR10 2900E Series Configuration Guide
l In both modes, when an Echo message is sent, the device detects that the neighbor
of the peer port is not the device itself during the final neighbor detection.
l
In aggressive mode, the status becomes PROBE because the last neighbor is aged,
and multiple Probe messages are sent continuously without any response.
l
In aggressive mode, the port receives the UDLD message sent by itself and there is
a self-loop.
To prevent a neighbor from being aged by mistake, a local device sends Flush messages
on its own initiative to the port on which the UDLD function is enabled in the following
situations.
l
The port is down administratively.
l
UDLD is down on the port.
l
The device is restarted.
Configuring UDLD
The UDLD configuration includes the following commands:
Command
zte(cfg)#udld port <portlist>{enable|disable}
zte(cfg)#udld port <portlist> mode {aggressive | normal}
zte(cfg)#udld port <portlist> message timer <7-90>
zte(cfg)#udld port <portlist> recovery {enable | disable}
zte(cfg)#udld port <portlist> recovery timer <10-600>
zte(cfg)#udld port <portlist> reset
zte(cfg)#udld force-check {enable | disable}
zte(cfg)#udld force-check timer <15-600>
show udld (all configuration modes)
show udld port [<portlist>] (all configuration modes)
UDLD Configuration Instance
l
Configuration Description
As shown in
send alarm information and shut down the ports.
SJ-20120409144109-002|2012-07-02(R1.0)
Figure 4-53, it is required that the switch can detect the connection error,
4-132
Function
Enables or disables UDLD on a port.
Sets the mode of a port in UDLD.
Sets the interval of sending messages
after UDLD enters the BiDirectional
status and the port is steady.
Enables or disables the UDLD recovery
function.
Sets the recovery interval.
Recovers link establishment function on
a port manually.
Enables or disables the forced
monologue detection function.
Sets the forced monologue detection
period.
Displays UDLD configuration on all
ports.
Displays port configuration, status and
detailed neighbor information.
ZTE Proprietary and Confidential