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Cisco QOS WFQ

  • 31-08-2001 1:50pm
    #1
    Gavin
    Registered Users, Registered Users 2 Posts: 4,676 ✭✭✭


    Howdy,

    Looking to get WFQ sorted on me cisco. The only problem is that the network goes through a linux machine, get's NAT'd then goes through the router. With the effect that all traffic to the router appears to be from the same address. And as such, the router is unable to break the traffic into streams for fair queuing. Is there a way to change the way the router recognises different streams. Ie instead of src and dst ip's, change it to just dst ip's ?

    Looked around on google, and cisco site, but cant find anything...

    Gav


Comments

  • #2
    The Cigarette Smoking Man
    Closed Accounts Posts: 649 ✭✭✭The Cigarette Smoking Man


    <font face="Verdana, Arial" size="2">Originally posted by Verb:
    Howdy,

    Looking to get WFQ sorted on me cisco. The only problem is that the network goes through a linux machine, get's NAT'd then goes through the router. With the effect that all traffic to the router appears to be from the same address. And as such, the router is unable to break the traffic into streams for fair queuing. Is there a way to change the way the router recognises different streams. Ie instead of src and dst ip's, change it to just dst ip's ?    </font>

    I don't think you can with NAT, I got this from the Cisco site:

    With standard WFQ, packets are classified by flow. Packets with the same source IP address, destination IP address, source Transmission Control Protocol (TCP) or User Datagram Protocol (UDP) port, or destination TCP or UDP port belong to the same flow. WFQ allocates an equal share of the bandwidth to each flow. Flow-based WFQ is also called fair queueing because all flows are equally weighted.

    That makes sense really, because each connection consists of src and dst ip addresses. If on a non-NATed subnet you only used the dst ip, you could have two seperate hosts attaching to a remote host and using the same flow.

    Have you got a proxy server on your network? Some proxies will allow you to throttle bandwidth based on Protocol, ip etc.

    PS for Cisco questions I'd post them on ie.comp as a lot more of the Cisco heads read that.


  • #3
    The Cigarette Smoking Man
    Closed Accounts Posts: 649 ✭✭✭The Cigarette Smoking Man


    Didn't realise you were the Moderator, ignore that last comment biggrin.gif


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