[c-nsp] 500 msec timers on Cisco GLC-T

[Tassos Chatzithomaoglou]

I think it's a general case that link failure detection time on copper is about 500ms, while on fiber is about 50ms.

Also, the default debounce timer is much lower on fiber ports:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/intrface.html#wp1044898

--
Tassos

Mike Louis wrote on 06/05/2009 03:16:
> Hey Folks,
> 
> One of my Cisco SEs told me the other day that there was a limitation in the GLC-T GBICs that prevented the switch from recognizing a  link up/down faster than 500 msec. This could cause a noticeable blip in a voice call. Apparently this is not an issue in the fiber SFPs. Has anyone ever heard of this  before. He was referencing a 3750 series switch when we were discussing the issue. I am not sure if its platform or GBIC specific. I also wonder if it affects normal 10/100/1000 ports the same way. Any ideas or thoughts? Ever heard of anything like this on other platforms?
> 
> Thanks
> 
> Mike
> 
> 
> 
> 
> ________________________________
> Note: This message and any attachments is intended solely for the use of the individual or entity to which it is addressed and may contain information that is non-public, proprietary, legally privileged, confidential, and/or exempt from disclosure. If you are not the intended recipient, you are hereby notified that any use, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the original sender immediately by telephone or return email and destroy or delete this message along with any attachments immediately.
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>