Changing The Keepalive Retries; Displaying Udld Information - Dell PowerConnect B-FCXs Configuration Manual

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UDLD overview

Changing the Keepalive retries

By default, a port waits one second to receive a health-check reply packet from the port at the
other end of the link. If the port does not receive a reply, the port tries four more times by sending
up to four more health-check packets. If the port still does not receive a reply after the maximum
number of retries, the port goes down.
You can change the maximum number of keepalive attempts to a value from 3 – 64. To change the
maximum number of attempts, enter a command such as the following.
PowerConnect(config)#link-keepalive retries 4
Syntax: [no] link-keepalive retries <num>
The <num> parameter specifies the maximum number of times the port will try the health check.
You can specify a value from 3 – 64. The default is 7.

Displaying UDLD information

This section describes the commands used to display information about a UDLD configuration.
Displaying information for all ports
To display UDLD information for all ports, enter the following command.
PowerConnect#show link-keepalive
Total link-keepalive enabled ports: 4
Keepalive Retries: 3
Port
4/1
4/2
4/3
4/4
Syntax: show link-keepalive
TABLE 67
This field...
Total link-keepalive enabled ports
Keepalive Retries
Keepalive Interval
Port
Physical Link
Logical Link
State
Link-vlan
386
Keepalive Interval: 1 Sec.
Physical Link Logical Link
up up
up up
down down
up down
CLI display of UDLD information
Displays...
The total number of ports on which UDLD is enabled.
The number of times a port will attempt the health check before concluding
that the link is down.
The number of seconds between health check packets.
The port number.
The state of the physical link. This is the link between the Dell
PowerConnect port and the directly connected device.
The state of the logical link. This is the state of the link between this Dell
PowerConnect port and the Dell PowerConnect port on the other end of the
link.
The traffic state of the port.
The ID of the tagged VLAN in the UDLD packet.
State Link-vlan
FORWARDING 3
FORWARDING
DISABLED
DISABLED
PowerConnect B-Series FCX Configuration Guide
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