IPIP - QOS on a Cisco 828 router

nathanmohan · ‎10-13-2005

I have configured two IPIP VPN tunnels from the main office to the branch offices. I would like to apply QOS for specific traffic and when I go in to the Tunnel interface to apply the QOS Pre-classify command I couldn't find it.

I am aware that this command is a must to mark the packets for QOS before routing through the tunnel. I believe my IOS doesn't support this. I read through lots of documents regarding QOS and it says this command is supported in all the IOS release after 12.3.

I am not sure whether I am missing something.

So I am just wondering do I need to buy a different IOS. If YES then how shall I buy it.

If any of you have got a IOS that supports QOS-PRECLASSFIY command will you be able to send it across to me.

I have already spent a lot of time and it is getting really important.

Your help will be highly appreciated.

Below is the IOS version on the Cisco 828 router:

Cisco Internetwork Operating System Software

IOS (tm) C828 Software (C828-K9OSY6-M), Version 12.3(10a), RELEASE SOFTWARE (fc2

)

Compiled Fri 22-Oct-04 23:33 by kellythw

Image text-base: 0x80013148, data-base: 0x80A55C88

attrgautam · ‎10-14-2005

One way is to bypass the use of Pre-Classification itself. On the ingress LAN you can mark the packets with TOS or DSCP and match the same on the tunnel as the ToS byte s copied by default to the GRE header. Hence you dont need Pre classification at all. Let me know if you need any help with the config

Regds

nathanmohan · ‎10-17-2005

Thank you very much for your reply.

Yes what you have said is correct. The reason why I have not tried that is because I don't know how to work it.

If you could send me a sample config that would be very much appreciated.

attrgautam · ‎10-17-2005

Assume Fa0/0 is the LAN traffic from which has to be encrypted and Fa0/1 is the WAN where the crypto map is applied. Assume the LAN is 10.1.1.0/24. SO the config will be as follows

access-list 100 permit ip 10.1.1.0 0.0.0.255 host

class-map set-prec

match access-group 100

policy-map set-prec

class set-prec

set ip precedence 5

interface Fa0/0

service-policy input set-prec

class-map Queuing

match ip precedence 5

policy-map queuing

class Queuing

prioirty 32

On fa0/1

service-policy output queuing

This is for IPSec there will be a slight modification for logical interfaces like tunnels etc where you have to do nested QoS. Let me know if this solved ur issue or if u need any more help

Regds