Re: Can NFS over FDDI work properly?

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#216

From: Will Fiveash
Date: Wed, 07 Oct 1992 15:07

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In article <qncmi00@rhyolite.wpd.sgi.com> vjs@rhyolite.wpd.sgi.com (Vernon Schryver) writes:
>The only IP fragmenting that an FDDI-ether bridge will usually need to
>do is of UDP packets.  UDP packets are datagrams, and have no sequence
>numbers of any kind.  If you don't have FDDI-ether-FDDI networks, the
>initial MSS negotiation in TCP will pick 1500.  This is consistent with
>the TCP/IP lore (and RFC) that considers fragmenting harmful.

I am somewhat confused about the statement concerning MSS negotiation.
My understanding was that if the two connecting systems were on the
same physical network then the MSS was the MTU of the interface -
TCP/IP header length.  If they were not on the same physical net, i.e.
router(s) involved, then the MSS was 536.  This is what I am reading
from Doug Comer's book "Internetworking with TCP/IP".

>Vernon Schryver,  vjs@sgi.com

-- 
Will Fiveash,  "My opinions above, facts below."
Internet:  will@austin.ibm.com

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References: <1992Sep26.114942.15941@nuscc.nus.sg> <mbt.718307170@Able.MKT.3Com.Com> <qncmi00@rhyolite.wpd.sgi.com>

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From: will@vulcan.austin.ibm.com (Will Fiveash)
Newsgroups: comp.dcom.lans.fddi
Subject: Re: Can NFS over FDDI work properly?
Keywords: NFS, FDDI
Message-ID: <1992Oct7.150707.29127@awdprime.austin.ibm.com>
Date: 7 Oct 92 15:07:07 GMT
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