[Sunhelp] solaris and routing, cant ping on local subnet ?

[Kevin Stevens]

I'm with sun-managers - bad subnet masks.  Go back and look again, this time 
NOT on the machine initiating the ping, but on the machines which aren't 
able to reply...

KeS


>From: Kevin Maguire <kmaguire at eso.org>
>Reply-To: sunhelp at sunhelp.org
>To: sunhelp at sunhelp.org
>Subject: [Sunhelp] solaris and routing, cant ping on local subnet ?
>Date: Wed, 10 May 2000 17:58:57 +0200 (MET DST)
>
>Hi
>
>[ I posted this to sun-managers, and have had several responses.  Most
>have suggested checking the subnet mask, which I have done and it is
>correct. ]
>
>I have a curious problem, which has defeated me.  Here goes ...
>
>machine X is on one of our subnets, and has IP address:
>
>AAA.BBB.CC.26
>
>There are about 50 machines (or so) on this subnet.  Of these machine
>X can ping about half of them, with no obvious pattern to those he can
>ping and those he cannot.
>
>He can also ping the router, which is on
>
>AAA.BBB.CC.199
>
>Those he cannot ping, cannot ping him either.  So machine Y, which
>cant be reached from Machine X, can't ping Machine X.
>
>Machine Z, which can't be ping-ed or ping machine X, can ping and be
>ping-ed from by Machine Y.  So it does seem the problem is just with
>Machine X.
>
>The network guys say everything on the port looks good.  We tried
>re-configuring a laptop with the same IP address as Machine X, and it
>works perfectly.  It can ping and be pinged from everything on the
>subnet.
>
>Machine X can ping everything outside its own subnet.
>
>All the configurations on this machine look OK, the routing table is
>as follows:
>
>% netstat -rn
>
>Routing Table:
>   Destination           Gateway           Flags  Ref   Use   Interface
>-------------------- -------------------- ----- ----- ------ ---------
>AAA.BBB.CC.0         AAA.BBB.CC.26         U        3    711  le0
>224.0.0.0            AAA.BBB.CC.26         U        3      0  le0
>default              AAA.BBB.CC.199        UG       0   6355
>127.0.0.1            127.0.0.1             UH       0 103429  lo0
>
>This is an Ultra 1, and is running Solaris 2.6.  The network is
>switched.  The netmask is 255.255.255.0, and machines that we cannot
>ping sometimes show up in the arp cache.  The physical addresses given
>are correct, though I dont know if this information is coming directly
>from the machines, or from the router which is in the ping-able set.
>
>Suggestions.  Any diagnostics I should run?
>
>TIA,
>Kev
>--
>              ___________________________________________________
>    /\___/\   | Kevin Maguire                      Unix Support |
>    | o o |   | ESO               European Southern Observatory |
>   __\_v_/__  |     -     -     -     -     -     -     -       |
>  (__/ . \__) | Tel: +49 (0) 89 3200 6387       *** e-mail ***  |
>   _|  :  |_  | Fax: +49 (0) 89 3200 6380      kmaguire at eso.org |
>  (__\_:_/__) |_________________________________________________|
>
>
>
>_______________________________________________
>SunHELP maillist  -  SunHELP at sunhelp.org
>http://www.sunhelp.org/mailman/listinfo/sunhelp
>

________________________________________________________________________
Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com