Sol8 / netraX1 / packet loss

From: Geoff Lane (zzassgl_at_zoe.mcc.ac.uk)
Date: 12/19/03

  • Next message: Mark de Roo: "SUMMARY: Configuring bge.conf" 
    Date: Fri, 19 Dec 2003 11:53:08 +0000
To: sunmanagers@sunmanagers.org

    I've got a network problem that seems intractable.

    We have a NFS server (E4500/Solaris 8) connected to ten clients (Netra
    X1/Solaris 8) via a Cisco Catalyst 2950 switch. We use Fibre between the
    server and the switch (via the GBIC interface) and 100MHz Cat5 between the
    switch and the NetraX1s. IPV6 is enabled on all machines, no machine acts as
    a router. The switch forms a private network used only for NFS traffic.
    All the clients were installed using jumpstart and a common OS image.

    This has been working well for about a year.

    A few weeks ago we noticed NFS problems on two of the clients. Mounting the
    NFS volumes was slow, as was accessing the data on the mounted volumes. On
    investigation (with the aid of Sun), nothing could be found wrong with the
    client network hardware or software. The problem clients also have
    difficulty using the private network to access other clients; we see 90%
    packet loss when pinging between a problem client and a working client over
    the private network even when it is otherwise idle.

    We've power cycled the switch, rebooted the clients and restarted the NFS
    daemons on the server with no improvement. We've replaced the Cat5 cables
    to the problem clients. We've moved the clients to different switch ports.
    The second NIC on each Netra is working without any problems.

    Running snoop on the problem client and another system indicates that the
    packets do reach the switch. The symptoms suggest that the switch is
    dropping about 90% of the packets originating from just two out of 10
    clients.

    Can anybody suggest anything else to try on Solaris before we try replacing
    the switch?

    Thanks, 

    -- 
/\ Geoff. Lane. /\ Manchester Computing /\ Manchester /\ M13 9PL /\ England /\
"Bother", said Pooh, as the vice squad took his GIFS
_______________________________________________
sunmanagers mailing list
sunmanagers@sunmanagers.org
http://www.sunmanagers.org/mailman/listinfo/sunmanagers
  • Next message: Mark de Roo: "SUMMARY: Configuring bge.conf"

    Relevant Pages

    • Re: Using multiple NICs
      ... one with the NFS server and one without the NFS server and a ... Lets say your NFS server is 192.168.1.100 and is thus on network ... You connect the machine with an IP of 192.168.2.199 to switch B ... two NICs, then what you want to do is bonding. ...
      (comp.os.linux.misc)
    • Re: Clients are losing connection to the server.
      ... would interrupt the external network as well. ... this switch cheap, or low end, but it is new and it could certainly be ... Server drops off and power ... Does this issue occurs with all clients or certain clients? ...
      (microsoft.public.windows.server.sbs)
    • Re: Cable Connection Question - Difference?
      ... Define "problems with clients connecting" ... Internal NIC-plugged into main switch ... can/should Network A be setup the same as Network B??. ... I had problems with clients connecting. ...
      (microsoft.public.windows.server.networking)
    • ENABLING file and print sharing through Linksys Firewall?
      ... port Switch through the switches uplink port. ... The end result that I desire is to allow clients on the switch's wired ... all machines throughout the network ...
      (comp.security.firewalls)
    • ENABLING file and print sharing through Linksys Firewall?
      ... port Switch through the switches uplink port. ... The end result that I desire is to allow clients on the switch's wired ... all machines throughout the network ...
      (comp.security.firewalls)