08-01-2012 01:10 PM - edited 03-11-2019 04:37 PM
I have a Cisco 5505 with a 12Mbps feed. I want to reserve 2Mbps for RTP traffic.
I followed the QoS guide here:
http://www.cisco.com/en/US/docs/security/asa/asa80/asdm60/user/guide/qos.html.
Could someone please look at the attached resultant service policy and tell me
if that should achieve the objective? The goal would be that any traffic destined
for port 5000 through 5100 UDP or TCP from any IP to any IP on any interface
should always have 2Mbps available to it.
Thank you.
Solved! Go to Solution.
08-01-2012 04:13 PM
Hello,
100% agree, you are doing police rating policy. Now if you are looking to give priority to that traffic then you should change from policing to priority.
Now remember that the QoS for priority purposes will start working only when the ASA gets oversubscrided or gets a lot of traffic, then he will start to prioritize those packets (rtp) first.
Regards,
08-01-2012 03:43 PM
Hello,
Change the direction from input to output as Policing actions are only applied on output directions!
Regards,
Julio
08-01-2012 04:08 PM
Thank you for the direction on which to apply. Reading through the docs a bit more it seems that policing is more synominous with throttling/limiting of traffic. Whereas what I really want to do is assure that the RTP traffic always has first dibs on 2Mbps of the 12Mbps of available bandwidth. Perhaps I should be looking more at Priority queing even if that takes away from the potential available bandwidth of all other apps. ?
08-01-2012 04:13 PM
Hello,
100% agree, you are doing police rating policy. Now if you are looking to give priority to that traffic then you should change from policing to priority.
Now remember that the QoS for priority purposes will start working only when the ASA gets oversubscrided or gets a lot of traffic, then he will start to prioritize those packets (rtp) first.
Regards,
08-01-2012 04:19 PM
Great - thank you. When I created the priority queues on the inside interface it suggested/defaulted queue limit 2048 and transmission ring 512. With the 12Mbps of bandwidth to the Internet do you think these values are appropriate. There is nothing in the documentation which puts the figures in context.
08-01-2012 04:25 PM
Hello,
Yes, you will be more than fine using those values
Set that up, clear the local-host table with the "clear local-host" command and let us know the result,
Regards,
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