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
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide