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New Member

UDLD question

I am testing out UDLD on a copper port to see if It can help proactively catch a problem between switches.  On the copper port, I used the udld port command.  The upstream switch is a 6509.  Watching the UDLD debug commands, I am not seeing it find the 6509 neighbor on the other end of the connection.  Does UDLD need to be implemented on both ends of the link ?

I am connecting to another departments 6509 from my 3750.  They provide the Cisco VOIP service in the firm.  Was hoping that this might allow me to see a cabling problem when it happened.

Thanks,

Ron

3 REPLIES
VIP Super Bronze

UDLD question

You need it on both sides of the connection:

from the config guide:

All connected devices must support UDLD for the protocol to successfully identify and disable unidirectional links.

here is the link to the doc:

http://www.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_19_ea1/configuration/guide/swudld.html

HTH

New Member

UDLD question

Ron,

I know you can configure UDLD on copper ports but, I don't think copper links can suffer from a uni-directionl link like fiber links.

Pat

Hall of Fame Super Gold

UDLD question

Putting UDLD on a copper port is a waste of time.

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