QoS on Cisco ASA 5510

[Curiosityx]

Greetings, i thought id managed to get over this hurdle then stumbled across this scenario.

I have an ASA 5510 connected to a Cisco 1841 which handles a 2Mb Leased Line, on the inside of the ASA i have multiple internal networks and a CCME Voice Router, there will be a mixture of voice and data traffic passing through the ASA, im in the middle of configuring a QoS policy on the ASA but need a little assistance deciding on which methods would be most effective in this situation and the calculations for CIR and Burst Rates.


I created an access list as below to identify voice traffic to our SIP proxy.


access-list Voice extended permit tcp any host 146.101.248.200 eq sip
access-list Voice extended permit udp any host 146.101.248.200 eq sip
access-list Voice extended permit udp any host 146.101.248.200 range 16384 32767


and defined a class map for voice traffic


class-map qos-voice-class
description VOIP Traffic Class
match access-list Voice


i have also configured a priority queue on the outside interface as well as adding a policy map.


policy-map qos-voice-pol
class qos-voice-class
priority
!
service-policy qos-voice-pol interface outside
!
priority-queue outside
tx-ring-limit 256


Do you guys think that this would be sufficient i should i also shape traffic on the outside interface to 2Mbit/s and configuring policing for all other traffic?

Something like this

policy-map qos_voice_pol
class qos-voice-class
priority
!
policy-map qos_shape_policy
class class-default
shape average 2000000 16000
service-policy qos_voice_pol
!
service-policy qos_shape_policy interface outside


Any help would be appreciated.

Regards

 

[S_D]

What codec are you using? H323? How many simulatenous calls do you expect to be putting across the link?

We have QoS across our LAN and WAN for VOIP. We use EF everywhere and allow all phones at the remote site to be used with 8KB per connection and it's all fine...

 

[Curiosityx]

What codec are you using? H323? How many simulatenous calls do you expect to be putting across the link?

We have QoS across our LAN and WAN for VOIP. We use EF everywhere and allow all phones at the remote site to be used with 8KB per connection and it's all fine...

It's a single site running G.711 with approximately 6 concurrent calls over a dedicated 2Mbit/s leased line.