set port oam uld mode

Use this command to set the OAM Unidirectional Link Detection (ULD) mode for the specified port.

Syntax

Parameters

Defaults

ULD is disabled by default on all ports.

Mode

All command modes.

Usage

If ULD is disabled, no attempt is made to detect unidirectional operation on the link. ULD supports two modes for the detection of a unidirectional link:

• Standard – Uses the existing OAM discovery protocol to perform the configured ULD action on the port (set using set port oam uld action) if more than 5 seconds elapses between reception of standard information OAMPDUs on the port.
• Fast – Establishes a second tier of OAM discovery by transmitting information OAMPDUs with the Fast ULD information TLV. The configured ULD action is performed if more than 3 times the interval defined by the fast timer setting (using set port oam uld fast-timer) elapses between reception of a Fast ULD information TLV on the port.

The configured ULD action can be to both disable the port and send a Syslog message or to only send a Syslog message. The ULD action defaults to only sending the Syslog message.

OAM ULD requires that both link peers are configured for active OAM mode, set using set port oam mode. To prevent ULD mis-configuration, the OAM peer disregards the configured OAM mode and operates as an active peer, if ULD is configured for either standard or fast mode.