Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

ip precedence-3640

I'm trying to forward based on IP-precedence bits


The 1700 successfully classifies packets with "ip-precedence critical" (5).

Next step is for Cisco 3640 to prioritize can I do this with a 3640 with older IOS image; this can be upgraded if necessary, but there is limited memory.

On the 3640, do I need an IOS with QOS to "trust" the ip-precedence set on the 1700 ?

Is there a simple way to have the 3640 to forward packets with ip-precedence of 5

  • Network Management
New Member

Re: ip precedence-3640

THis is the route-map in use on the 1700...

It is definately setting the precedence, but when the 3640 gets the packet, how can I force it to read and prioritize the packet ?

route-map prior13net4 permit 20

match ip address 106 107

set ip precedence critical

Super Bronze

Re: ip precedence-3640

If your 3640 IOS supports CBWFQ, on your outbound FastEthernet interface (assume Ethernet because of downsteam 3750), you could first try:

policy-map Yourname

interface Fastethernet 0

service policy output Yourname


class-map yourclassname

match precedence critical

policy-map Yourname

class yourclassname

priority # (Kbps)

interface Fastethernet 0

service policy output Yourname

This widget could not be displayed.