[cisco-voip] Qos for V3PN

[Aman Chugh]

Hi All,

 I working on a configuration for Qos for a site to site ipsec vpn tunnel on
which we run voice,The link is 512 kbps and also supports nat traffic to the
internet.I have gone thorugh the QOS srnd for V3PN  and have put together a
config,please let me know if there is any gotcha to be aware of.This remote
site currently uses around 6 ipphones registered to a central site
callmanager and there are no gateways at this site.I am doing this Qos
configuration as Occassionly I see email traffic overwhelming my voice
traffic.Please share your experience with the same scenario.

1. Classify traffic using ACL

ip access-list extended Voice-bearer
remark Match the UDP ports that VoIP Uses for Bearer Traffic
permit udp any any range 16384 32767

ip access-list extended Voice-signalling
remark SCCP
permit tcp any any range 2000 2002

2.Make class map

class-map match-all Voice-rtp
description  Bearer Traffic
match access-group name Voice-bearer

class-map match-all Voice-control
description  Control Traffic (SCCP)
match access-group name Voice-signalling
3.policy-map encr-traffic
class Voice-rtp
priority 256
class Voice-control
bandwidth 128

4.Apply the policy on serial interface connected to the internet
service-policy output encr-traffic
5. Also add the qos pre-classify on serial interface connected to the
internet


Aman
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://puck.nether.net/pipermail/cisco-voip/attachments/20060910/05b5b277/attachment.html