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Grant <emailgrant@×××××.com> wrote: |
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> A while back I was having networking issues. I eventually tried |
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> drastically lowering the MTU of all the systems onsite and the issues |
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> disappeared. I always thought the issue was due to the MTU on our |
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> modem/router. Today I read that AT&T DSL requires a 1492 MTU so I |
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> increased the MTU of our systems up to 1492 and haven't had any |
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> issues. Do certain ISPs require you to change the MTU of your entire |
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> network, or is this likely due to our AT&T modem/router itself? |
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AFAIK the MTU is defined for every network interface separately. For an |
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ADSL connection it is common that a lower MTU is needed because of the |
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PPPoE header information that is encapsulated in the ethernet frames. |
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But in that case it is sufficient to lower the MTU just for the WAN |
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interface that is connected to the DSL modem. |
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If you don't use protocol encapsulation in your LAN then there should |
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be IMHO no reason for lowering the MTU of your internal interfaces. |
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-- |
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Regards |
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wabe |
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