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New Member

Bandwidth guarantee

4 companies like to share one leased line (used for internet access) and the monthly costs. Therefore, each company should get a part of the available bandwidth (e. g. 500 kbps). This bandwidth should be guaranteed but limited to 500 kbps as well.

Therefore, I like to combine CBWFQ with rate limiting:

policy-map INTERNET_IN

class COMP_A

bandwith 500

policy cir 500000 bc 80000

conform-action transmit

exceed-action drop

The policy-map is bound outgoing to the inside FastEthernet Interface and it is working (show policy-map interface fastethernet 0/0).

But I only get a download speed round about 10 kbps. Without the policy-map I achieved much more. This might be as sign using the wrong values for cir and bc.

The above target in mind, does anybody know how to set those values getting a working solution?

Thanks in advance

Edgar

4 REPLIES
Silver

Re: Bandwidth guarantee

access-list 1 permit comp a addresses

class-map COMP_A

match access-group 1

policy-map internet_in

class COMP_A

police 500000 62500 62500 conform-action transmit exceed-action drop

f0/0

service-policy out internet_in

New Member

Re: Bandwidth guarantee

Access-list and class-map are still included in the configuration. The policy-map is working, but I do not achieve the target bandwidth.

I will test your values, but there are some questions:

- What´s the meaning of 62500 62500

- Why don´t you use the bandwidth statement as well.

Rate-limiting limits the max. bandwidth but

doesn´t guarantee any minimum bandwidth ...?

Thanks

Edgar

bandwidth

Silver

Re: Bandwidth guarantee

Edgar

The 62500 is the burst rate.

If you can define an ACL that defines the subnets that each company is coming from then you can reserve 500 K for each comp by using rate limiting .

New Member

Re: Bandwidth guarantee

Sorry, maybe my question was not exact:

The access-list is in place as well, but I want to know how you have calculate the Bc value. Furthermore I don´t know if rate-limiting garantees the bandwidth in case of congestions. Therefore I have configured police plus bandwidth (CBWFQ). Your configuration does not include the bandwidth command. Why?

Thanks

Edgar

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