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Routing for Games

a_jam_sandwich
Level 1
Level 1

Hi, as a noob im running into difficuly setting my 2600 router up for traffic shapping. I have a router with the following config

version 11.3

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname Router

!

!

memory-size iomem 20

frame-relay switching

!

!

!

!

interface BRI0/0

no ip address

shutdown

!

interface TokenRing0/0

no ip address

shutdown

ring-speed 16

!

interface Ethernet1/0

description NAT Ethernet 2600 Router

ip address 192.168.87.3 255.255.0.0

ip nat inside

priority-group 1

!

ip default-gateway 192.168.7.1

ip classless

ip route 0.0.0.0 0.0.0.0 192.168.7.1

!

!

ip access-list standard exit

access-list 101 permit udp any any

access-list 102 permit tcp any any

priority-list 1 protocol ip low list 101

priority-list 1 protocol ip high list 102

priority-list 1 default low

!

!

line con 0

line aux 0

line vty 0 4

login

!

no scheduler allocate

end

Nice and simple. For accessing the web, games etc it works perfectly. The problem I have is I want to traffic shape certain packet types namely UDP so they have priority over TCP.

Basically I want to be able to download files while allowing games to be played over the Internet with as small increase in latency as possible.

I have a 1mbit ADSL line. Running the DEBUG priority-list does show that the above config is giving the right priority It just makes no difference when testing.

Any ideas,

Many thanks for you help

Andy

2 Replies 2

Kevin Dorrell
Level 10
Level 10

I think the point here is that you can manage the prioities of your outgoing traffic, but that would not have any influence over the incoming traffic. For packets in that direction, it depends on the priorities determined by your service provider's router.

At that point, I should hand over to someone who knows more about QoS. I believe it is possible to influence the incoming traffic using WRED, but only for TCP traffic. It is done by deliberately dropping packets occasionally, which forces the TCP to re-transmit, and so slows it down. But I haven't studied that chapter in sufficient detail yet.

Kevin Dorrell

Luxembourg

Does no one know? There is a link to a linux version using QoS called the wondershaper wonder if this helps http://lartc.org/wondershaper/

Many thanks again

Andy