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Do I need a special switch to pass PPPoE traffic?

Created by dave. Last edited by dave, 13 years and 127 days ago. Viewed 1,810 times. #2
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Do I need a special switch to pass PPPoE traffic?

Q: I have a single DSL modem and three PPPoE devices which use this DSL connection. Do I need a special PPPoE-capable switch to make this work, or will the $20 piece of crap I have work properly?

A: No. PPPoE is PPP encapsulated in a ethernet frame; there is nothing special about these frames from a ethernet point of view (the layer at which most switches and hubs will be dealing with them). Any hub or switch should handle them without any problems.

The practical upshot of this is that the MTU of the traffic over the PPPoE is slightly smaller to accomodate the PPPoE overhead; this will affect applications which generate long packets but don't deal well with fragmentation.

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