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9.3

QOS over GRE Tunnel

Asked by mmurraynet in Voice Over IP, IP Telephony, Network Routers

I have a router with a GRE tunnel set up and passing VOIP traffic. I'm trying to figure out exactly what is happening with regard to QOS, specifically  traffic shaping and queuing, for the following config:

interface Tunnel0
 ip address 10.1.2.1 255.255.255.0
 qos pre-classify
 cdp enable
 tunnel source 78.12.21.28
 tunnel destination 122.14.6.122
 tunnel bandwidth transmit 1544
 tunnel bandwidth receive 1544
 service-policy output TUNNEL_QOS

policy-map VOICE
 class VOICE
  priority 480
 class class-default
  police rate 900000 bps
    conform-action transmit
    exceed-action drop

policy-map TUNNEL_QOS
 class class-default
  shape peak 15440000
  service-policy VOICE

It looks like this QOS strategy doesn't make sense.

Here's my guess:
1. Policy map "VOICE" puts VOIP (class "VOICE") traffic in priority queue and guarantees 480k. Won't this max out at 480k?
2. Policy map "VOICE" also polices "class-default" traffic traffic to 900k.
3. Policy map TUNNEL_QOS specifies peak rate shaping of 1.54 mbps for class-default and applies policy map VOICE. But at this point would any traffic get classified as VOICE?
[+][-]03/15/08 11:53 AM, ID: 21133807Accepted Solution

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About this solution

Zones: Voice Over IP, IP Telephony, Network Routers
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Solution Provided By: cstosgale
Participating Experts: 2
Solution Grade: A
 
[+][-]03/14/08 11:43 PM, ID: 21131669Expert Comment

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