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Extreme 24e

Posted on 2003-11-24
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Will these do port base rate limiting? I'm looking at would they do port rate limting to the kbps.
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Question by:mfjp
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td_miles earned 125 total points
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Assuming that you are talking about this product:
http://www.extremenetworks.com/libraries/prodpdfs/products/summit200_24_48.asp
(which was the only "24e" that I could find)

then it would appear that they do. From the feature list, I quote:

"Flow-based central rate limiting that can be applied to any classified packet flow"

So you can rate limit based on an ACL, which means you just need to create an ACL that will match the traffic you want to limit and then you should be fine. There do appear to be restrictions however:

http://www.extremenetworks.com/services/documentation/ExtremeWareUser622-Chapter07.asp

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Configuring Bi-Directional Rate Shaping
Each VLAN requires a loopback port; all traffic from rate-shaped ports is directed through the loopback port for that VLAN. To rate-shape ingress traffic, configure QoS normally on the loopback port for the VLAN. The maximum bandwidth and traffic grouping defined in the QoS profile for the loopback port defines the rate limit for ingress traffic on rate-shaped ports in that VLAN.
Use the following guidelines for bi-directional rate shaping:

You must configure a loopback port before adding rate-shaped ports.
A loopback port cannot be used by an external device.
You must configure the loopback port with a unique loopback VLAN tag ID.
Ingress traffic on a port that is configured to use the loopback port will be rate-shaped.
Ingress traffic on a port that is not configured to use the loopback port will not be rate-shaped.
Unicast traffic from a non-rate-shaped port to a rate-shaped port within the VLAN will not be rate-shaped.
The aggregate forwarding bandwidth of all rate-shaped ports in a VLAN is determined by the setting of the queue parameters of the loopback port.
For 10/100 Mbps ports, you can configure the loopback port as a 10 Mbps port to achieve lower bandwidth values.

To remove the rate-shaping parameters of the loopback port, configure the QoS profile without specifying the buffer or portlist parameters.
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