From: Kayode Oladipo (kayoladipo@hotmail.com)
Date: Mon Jun 26 2006 - 03:27:19 ART
Concerning matching voice traffic using NBAR or ACL, are these going to
give same results are what will be the prefered/acceptable config for a
lab requirement to match critical voice traffic with precedence 5.
1. ACL
ip access-list extended VOICE
permit udp any any range 16384 32768 precedence 5
!
class-map VoIP
match access-group name VOICE
!
policy-map POLICY_VOICE
class-map VoIP
bandwidth percent 40
2. NBAR
class-map match-all VoIP
match ip rtp 16384 16383
match ip precedence critical
!
policy-map POLICY_VOICE
class-map VoIP
bandwidth 40
What will be the acceptable configuration to meet the requirement of
matching critical voice traffic?
Thanks,
Kayode
--------------------------------------------------------------------
From: "Scott Morris" <swm@emanon.com>
Reply-To: "Scott Morris" <swm@emanon.com>
To: <elias.chari@gmail.com>, <ccielab@groupstudy.com>
Subject: RE: VoIP QoS and TCP port 1720
Date: Mon, 26 Jun 2006 01:08:49 -0400
>The control traffic (and also because it's TCP and has it's own
mechanisms)
>generally doesn't need to be prioritized. That's certainly a
personal
>decision, and I've had clients to it both ways. But the amount of
your
>control traffic on tcp/1720 compared to the RTP traffic is minimal.
>
>That doesn't make either method incorrect though. Just the approach
to get
>the results is a bit different!
>
>HTH,
>
>
>Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713,
JNCIE
>#153, CISSP, et al.
>CCSI/JNCI
>IPExpert CCIE Program Manager
>IPExpert Sr. Technical Instructor
>smorris@ipexpert.com
>http://www.ipexpert.com
>
>
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
Of
>elias.chari@gmail.com
>Sent: Sunday, June 25, 2006 9:03 AM
>To: ccielab@groupstudy.com
>Subject: VoIP QoS and TCP port 1720
>
>Hi,
>
>I have seen in a vendor's workbook various examples of prioritising
VoIP, in
>some occassions a class is used with NBAR to match protocol rtp and
in
>others an ACL to match the udp port range used for RTP and also
matching the
>Voice GW signalling on TCP 1720. The wording of the tasks was pretty
much
>identical but the solutions differ!
>
>What is your opinion when asked to prioritise VoIP in the Lab,
should one
>always include TCP 1720?
>
>Thanks
>Elias
>
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