Viewing Detailed Udld Information For Specific Ports (Cli); Clearing Udld Statistics (Cli); Uplink Failure Detection - HP Aruba JL253A Management And Configuration Manual

Viewing detailed UDLD information for specific ports (CLI)

Enter the show link-keepalive statistics command.
Example:
Figure 8: Example: of show link-keepalive statistics command

Clearing UDLD statistics (CLI)

Enter the following command:
switch# clear link-keepalive statistics
This command clears the packets sent, packets received, and transitions counters in the show link
keepalive statistics display (see Figure 8: Example: of show link-keepalive statistics command on
page 99 for an Example:).

Uplink Failure Detection

Uplink Failure Detection (UFD) is a network path redundancy feature that works in conjunction with NIC teaming
functionality. UFD continuously monitors the link state of the ports configured as links-to-monitor (LtM), and when
these ports lose link with their partners, UFD will disable the set of ports configured as links-to-disable (LtD.)
When an uplink port goes down, UFD enables the switch to auto-disable the specific downlinks connected to the
NICs. This allows the NIC teaming software to detect link failure on the primary NIC port and fail over to the
secondary NIC in the team.
NIC teams must be configured for switch redundancy when used with UFD, that is, the team spans ports on both
Switch A and Switch B. The switch automatically enables the downlink ports when the uplink returns to service.
For an example of teamed NICs in conjunction with UFD, see Figure 9: Teamed NICs in conjunction with UFD
on page 100.) For an example of teamed NICs with a failed uplink, see Figure 10: Teamed NICs with a failed
uplink on page 100.
Chapter 3 Port Status and Configuration 99