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On 23 April 2007, ames wrote: |
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> kashani <kashani-list <at> badapple.net> writes: |
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> > >> Just curious: What kind of network (layer 2) is this that allows an |
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> > >> MTU of 9000? |
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> > >> Uwe |
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> > > |
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> > > It sounds like Gigabit Ethernet to me. |
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> > |
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> > Keep in mind that not all fastE or gigE switches support jumbo frames. |
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> > Additionally not all cards support jumbo frames either though you can |
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> > certainly set them to an MTU of 9000 and watch things break. |
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> > |
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> > To the original poster, I'd do some googling and verify that all the |
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> > network cards and switches involved can do jumbo frames and that it is |
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> > enabled on each device as needed. |
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> > |
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> > kashani |
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> |
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> Does NFS have any negotiations to determine if jumbo frames can work |
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> between 2 system, then use a smaller mtu if a larger (jumbo) mtu |
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> is not suppported between devices? |
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Don't stare at NFS. It's too high a layer in the TCP/IP stack. And yes, it |
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can deal with large packets. You can use NFS with localhost (127.0.0.1), |
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right? That one usually has an MTU of 16,436. |
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The real issues with MTUs occur at layer 2 (ethernet or whatever you are |
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using), IP (fragmentation and de-fragmentation) and ICMP (MTU discovery). |
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Uwe |
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|
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-- |
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The Informal Linux Group Namibia: |
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http://www.linux.org.na |
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SysEx (Pty) Ltd.: |
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http://www.SysEx.com.na |
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-- |
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gentoo-user@g.o mailing list |
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