Dell FCX624-E Laptop User Manual


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386 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
UDLD overview
11
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.
Syntax: show link-keepalive
TABLE 67 CLI display of UDLD information
This field... Displays...
Total link-keepalive enabled ports The total number of ports on which UDLD is enabled.
Keepalive Retries The number of times a port will attempt the health check before concluding
that the link is down.
Keepalive Interval The number of seconds between health check packets.
Port The port number.
Physical Link The state of the physical link. This is the link between the Dell
PowerConnect port and the directly connected device.
Logical Link 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.
State The traffic state of the port.
Link-vlan The ID of the tagged VLAN in the UDLD packet.
PowerConnect#show link-keepalive
Total link-keepalive enabled ports: 4
Keepalive Retries: 3 Keepalive Interval: 1 Sec.
Port Physical Link Logical Link State Link-vlan
4/1 up up FORWARDING 3
4/2 up up FORWARDING
4/3 down down DISABLED
4/4 up down DISABLED