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. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

QOS for point-point ASA 5505

Hi experts,

I got a point to point ASA 5505 and wanted to configure qos since only the ip phones is using it.

Any recommendations? do really qos effective in WAN links?

tnx

1 REPLY
Anonymous
N/A

Re: QOS for point-point ASA 5505

To effectively implement priority queuing for VoIP, you should always configure rate-limiting (policing) as well to drop traffic that exceeds a specified level. Priority traffic is not rate limited. Policing is required because the ASAdoes not support traffic

shaping. This means that there is no backpressure on the flows to limit the amount of traffic being sent. Thus, without policing, priority queing really only has an affect if the ASA's interface becomes saturated. Then priority traffic is sent over non-priority

traffic. However, in most cases the ASA will be connected to a switch via 100MB/Full duplex. But the upstream connection to the Internet is much less than 100Mb/Full duplex. So there won't be much queing on the ASA interface, but the upstream device will drop the packets (unless it supports some type of QoS). .

http://www.cisco.com/en/US/docs/security/asa/asa70/configuration/guide/qos.html

107
Views
0
Helpful
1
Replies