T1 QoS Questions

Unanswered Question
Jul 25th, 2007
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Hello everyone, I have a few questions that I could use some help on :)..

I currently have a T1 link that has no QoS settings at all (L3). Through this link, we pass exchange traffic to offsite clients, all domain services, www traffic, and many other things.

I would like to know exactly how to configure this link so we can prioritize the exchange update traffic, and the web traffic (2nd, behind exchange).

Again, I know this isn't always recommended, but when users are transfering files back and forth between sites, the network at our offsite location runs terrible (I'm assuming that its because theres a large file being transferred, and packets aren't prioritized correctly)..

Any help is greatly appreciated.


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sivakondalarao Sun, 08/05/2007 - 03:15
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hi ; you need to put a qos for each application based on it portnumber or ipaddress then u need to create a class on which these ip are grouped and polciy will do the BW limiting for this particular class

refer cisco QOS configs

stanleyb Fri, 08/17/2007 - 12:56
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Try this bellow or you can try using "auto qos voip trust" under the Serial Interface. Hope it helps.

config t

ip cef

class-map match-all EXCHANGE

match source-address mac (ENTER MAC ADDRESS of EXCHANGE SRV, repeat if you have more exchange servers)

class-map match-all WWW

match protocol http

policy-map INPOLICY


set dscp ef

class WWW

set dscp af31

policy-map OUTPOLICY


priority percent 60

class WWW

bandwidth percent 30

class class-default


interface FastEthernet0/0

ip address x.x.x.x x.x.x.x

service-policy input INPOLICY

interface Serial0/0

bandwidth 1544

ip address x.x.x.x x.x.x.x

service-policy output OUTPOLICY

keepalive 20



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