Ethernet NAPs (was Re: Miami ...)
RJ Atkinson
rja at inet.org
Thu Aug 23 00:41:10 UTC 2001
At 19:43 22/08/01, Leo Bicknell wrote:
>_ALL_ devices on a layer-2 fabric need to have the same MTU. That
>means if there are any FastEthernet or Ethernet connected members
>1500 bytes is it. It also means if you pick a larger value (4470,
>9k) _ALL_ members must use the same value.
Only devices exchanging frames with each other need have the same
MTU. One could easily imagine one 802.1q VLAN with MTU N and
a different 802.1q VLAN with MTU Y all on the same switch,
to give a trivial example. Some exchanges already use VLANs
with their GigE switches for a variety of business reasons.
Ran
rja at inet.org
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