Cat 4500 SPAN issues

[JACQUES DU PLESSIS]

Hi Guys,

We have a old 4500 with Sup5 10GE and I am trying to SPAN a port on the supervisor to a port on a line card.

However I see severe ouput drops on the line card port. is there some kind of limitation on this supervisor or platform that will cause this?

Thanks

Jacques

[pwwiddicombe]

You have to consider what kind of volume you have on the port you are spanning.  If you are capturing, say, from the 10GE port and spanning to a 1 Gig line card port, then when the 10G reaches 10% load, you will be trying to send too much to the line card port; and you WILL have severe output drops on the line card.  Even short bursts will probably not get buffered adequately.

[JACQUES DU PLESSIS]

You sort of answered the question, no I am spanning 1Gb - 1Gb. However thinking about "am I overutilizing the port" I realized rx and tx traffic on the source is converted to tx only on the destination, in which case I probably am overutilizing it.

Thanks

Jacques