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From: BILLW@mathom.cisco.com (WilliamChops Westfield)
Newsgroups: comp.dcom.sys.cisco
Subject: Re: NFS over routers
Message-ID: <30422@boulder.Colorado.EDU>
Date: 29 Nov 90 23:19:22 GMT
Sender: daemon@boulder.Colorado.EDU
Lines: 18


    What happens when a directory is NFS hard mounted over a router CISCO in
    this case, and the server machine connection is lost? I know the client
    hangs until the route is reestablished, but will this also potentially
    hang the intermediate CISCO(s) due to the immmense amount of UDP traffic
    the client is shipping out trying to reestablish the connection?

If NFS in fact generates "immense amounts" of traffic when it is unable
to talk to a remote host, then it is very broken.  The correct behavior
would be to exponentially back off retransmissions in the absence of
ACKs, and to essentially ignore anything like a "network unreachable"
that is received.  I'd be very surprised if NFS would generate more
traffic in the face of network problems - this would be considered very
anti-social in the internet community.

Bill Westfield
cisco Systems.
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