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UDLD enable by default on version 122-31.SG

Hi,

[1] I would liket to confirm if UDLD is enabled by default on version 122-31.SG. I have 4506 equipments.

[2] What is the benefit of UDLD aggresive ? To my understanding the port will attempt to be up from error disable state 8 times. So is this good or bad ? ie) if the fiber is bad, then there is no use using the aggresive mode right ?

Thank you,

- sn -

2 REPLIES
Bronze

Re: UDLD enable by default on version 122-31.SG

Yes, UDLD is enable by default on version 122-31.SG

Cisco Employee

Re: UDLD enable by default on version 122-31.SG

Sanjay,

1. To answer your first question, it depends upon what kind of media and interface/global level.

UDLD global enable state - Globally disabled

UDLD per-interface enable state for fiber-optic media - Enabled on all Ethernet fiber-optic interfaces

UDLD per-interface enable state for twisted-pair (copper) media - Disabled on all Ethernet 10/100 and 1000BaseTX interfaces

Please refer the below URL for details:

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat4000/12_2_31s/conf/udld.htm#wp1020435

2. Please refer the below URL and this should answer your second question:

http://www.cisco.com/warp/customer/473/77.html#udldmodes

Please let me know if it helps.

Regards,

Arul

.

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