Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Announcements

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

qos on switches

Hi all, on a switch, do we have ingress queues and egress queues? and what is each one for ?

3 REPLIES
New Member

Re: qos on switches

Your question is very broad and thus varies by platform.

Most new Cats have ingress queuing and egress queueing. For lower end switches this can normally be found in the data sheet for each device. For chassis switches it is usually dependant on the line card - again, check the data sheet for the line card. 'Sh int cap' may tell you depending on the platform

Ingress queueing is generally storing packets as they are received before they are switched and egress queueing stores the packets before they are serialised (put on the wire). Ingress queues are generally quite small as your ingress throughput would have to max the fabric/backplane throughput in order to experience congestion, which is generally rare. Egress queues are generally larger as egress throughput may be less than the aggregate being pushed out the interface.

HTH,

Paul

New Member

Re: qos on switches

is there a document for this at all ?

Re: qos on switches

246
Views
0
Helpful
3
Replies
CreatePlease to create content