06-17-2008 01:21 AM - edited 03-05-2019 11:40 PM
Hi folks,
I may be losing the plot but can I simulate unidrectional link failures using fibre to help my CCNP studies? I thought it would be a simple matter of pulling out just the rx on one of my switches but that brings the int down. Is this how it's supposed to work?
I want to do this to look further into udld.
thanks
Dave
06-17-2008 01:51 AM
You can use PACL to simulate unidirectional link failure. UDLD uses 0100.0ccc.cccc as destination MAC address.
So configure a PACL denying this mac address and apply the same to the interface on which you need to simulate the link failure.
HTH,
Nagendra
06-17-2008 05:56 AM
Thanks Nagendra,
I'll look up PACL.
Now what about the fibre failure I simulated, is expecting that to be a unidirectional link failure a wrong assumption?
ta
Dave
06-17-2008 12:32 PM
It is my understanding that your assumption is right. One thing to note is that both switches will have to establish a bidirectional state once before UDLD will shutdown an interface. Try connecting them and do a "show udld neighbors"
10-06-2018 11:32 PM - edited 10-06-2018 11:33 PM
I know its quite late for the answer, but just for other people visiting here.. I was just thinking that attaching the Rx to a higher voltage source should work out since it should complete the loop
Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: