11-14-2006 06:49 AM - edited 03-05-2019 12:48 PM
Hello All
I wonder if udld on fibre links is really needed to be enabled or not.
Are there actually any benefits of enabling it in a completely fine running network?
We only use Cisco Switches here, from around 6 different series.
Thanks,
pato
11-14-2006 07:30 AM
Hi Pato ,
check the below link.
http://www.cisco.com/en/US/customer/tech/tk389/tk621/technologies_tech_note09186a008009477b.shtml
Thanks,
satish
11-14-2006 07:34 AM
Hi Pato,
Network is running fine and cross your finger it keep working fine but you never know when problem can come and cause some major issues.
UDLD is a Layer 2 protocol that enables devices connected through fiber-optic or twisted-pair Ethernet cables to monitor the physical configuration of the cables and detect when a unidirectional link exists. All connected devices must support UDLD for the protocol to successfully identify and disable unidirectional links. When UDLD detects a unidirectional link, it disables the affected port and alerts you. Unidirectional links can cause a variety of problems, including spanning-tree topology loops.
So no problem in enabling UDLD.
Have a look at this link for more details
http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12225see/scg/swudld.htm
HTH
Ankur
11-14-2006 07:51 AM
Thanks for the answers.
One more question, if I enable UDLD on one switch, would that cause any spanning-tree issues till I'd have it enabled on the connected switches?
Or can I simply enable it globally and nothing will happen?
Thanks,
pato
11-14-2006 08:26 AM
Hi Pato,
You will definetely not be able to implement this on all the switches at a same time so you can enable it on one switch and then start doing it on neighbor switches.
I will always recommed you when you raise a change request to implement this arrange some time for the same and also try to do it when there are minimal users.
Also recommend you to have a look at the link before implementing.
HTH
Ankur
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