qos on 1841

Answered Question
Sep 30th, 2007

hi all, i am new to qos.

i have 1841 with 2 interfaces for lan and wan.

i need to limit the ftp bandwith to 1mb, how can i do it at the router level?

Thanks

Correct Answer by kerek@banknet.net about 9 years 4 months ago

Hi,

You can either use CAR or Class based policing on the ingress interface.

Krisztian

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Joseph W. Doherty Sun, 09/30/2007 - 04:48

If the 1841 is running a later IOS image that supports CBWFQ, you could do it as follows:

pseudo-config

class-map FTP

match protocol ftp

policy-map CBWFQ

class FTP

bandwidth 1mb

police 1mb

int s0

service-policy out CBWFQ

I'm suggesting using CBWFQ, which will allow you to easily expand QoS if you so desire.

You could also do the above with a shape command instead of police. The policier will drop all FTP traffic above 1 Mb, a shaper will queue it and to keep FTP from exceeding 1 Mb.

You could also not limit FTP bandwidth, but just prioritize to only use excess bandwidth.

e.g.

policy-map CBWFQ

class FTP

bandwidth percent 1

Correct Answer
kerek@banknet.net Sun, 09/30/2007 - 23:34

Hi,

You can either use CAR or Class based policing on the ingress interface.

Krisztian

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