Restricting upstream in a switched LAN

Oct 18, 2006 3 Replies
D

Is there any way to restrict upstream bandwidth in a switched LAN Configuration is:



Backbone (ISP) -> router -> switch1 -> switch2 -> switch3 | -> switch4



Backbone is 100/100 FD. What i want is to restrict ports on switch2 and switch3 to 10down / 2up mbit switch4 must still access the backbone at 100 / 100 so restriction cannot be in the router... (or can it ???) switch4 serves me, and a couple servers... but switch 2 and 3 are workstations and users there use upstream too much. (sending large files) Is it possible to restrict individual ports ???? thanks



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A

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It depends on what kinds of traffic management functions that the switch you have supports. A switches could support several features that may be used to accomplish this:

- Policing/rate limiting - will typically limit bandwidth use on ingress.

- Shaping - will typically limit bandwidth use on egress.

- Per port maximum bandwidth limit.

Anoop

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D

I don't think that my switches are capable of this. they are intelligent, but not that intelligent :-) You wrote - per port maximum bandwidth limit.. but does this feature limit only upstream or both ways ?

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A

It really depends on the manufacturer of the switch since these features are not part of any standard. In products that I have worked with, this feature limits egress bandwidth on the port -- the max that the port will be allowed to transmit. For ingress rate limiting, the feature is usually referred to as rate limiting or policing.

Anoop

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