SUMMARY: Strange netstat problem

From: Will Dowling (william.m.dowling_at_nuim.ie)
Date: 09/28/05

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    Date: Wed, 28 Sep 2005 11:35:33 +0100
To: Sunmanagers <sunmanagers@sunmanagers.org>

    Thanks to all that replied. Everybody pretty much hit it on the head.
    It turned out it was a DNS problem. Two weeks ago the VLAN our Blades
    were in merged with another VLAN and there was an IP Address change.
    The DNS server still registered both the old and new IP addesses with the
    hostnames causing a conflict. I just got our hosting to set the hostnames to
    the new addresses and they worked a treat.
    The conflict caused really slow network transfer, NFS was horrible.
    The netstat -i output has now been corrected.
    Thanks again,

     Will

    Will Dowling wrote:

    > Sunmanagers,
    > Apologies if this question should be directed elsewhere...
    > I have two Blade Workstations, one allows users to login via
    > Gnome with no problems. The other is extremely slow. Gnome takes
    > forever to loging.This is most likely an NFS problem as eventually
    > when it does login various
    > commands that execute off of the NFS server are extremely slow.
    > One thing that sticks out is the netstat command. This might not
    > be the problem but has anyone ever seen this before?
    >
    > This is the output of the machine that works:
    > bash-2.05$ netstat -i
    > Name Mtu Net/Dest Address Ipkts Ierrs Opkts Oerrs
    > Collis Queue
    > lo0 8232 localhost localhost 973 0 973 0
    > 0 0 bge0 1500 ncg002 ncg002 64758 0
    > 77911 0 0 0
    >
    > While this is the output of the machine that does not work:
    > bash-2.05$ netstat -i
    > Name Mtu Net/Dest Address Ipkts Ierrs Opkts Oerrs
    > Collis Queue
    > lo0 8232 localhost localhost 828 0 828 0
    > 0 0 bge0 1500 10.209.2.0 10.209.2.92 261776 0
    > 250204 0 0 0
    >
    > The outstanding parts are the IP addresses. I don't understand why the
    > first has
    > the hostname while the second has the IP Address(with wrong entry for
    > Net/Dest).
    > Where do I change this setting?
    > I've checked in /etc/hosts, /etc/hostname.bge0, /etc/nsswitch.conf.
    > /etc/resolv.conf,
    > /etc/inet/*, /etc/netmasks but nothing comes up.
    >
    > Again this may or may not be the problem. Several other machines
    > exhibiting the same
    > behaviour are setup like machine 2 above.
    > Thanks in advance.
    >
    > Will
    > 

    -- 
Will Dowling
System Administrator, National Centre for Geocomputation,
National University of Ireland, Maynooth,
County Kildare, IRELAND
Phone: +353 1 708 6191
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