AIX answer - "arp -d ipname" will delete the existing arp table entry and
force a new arp discovery request. You mentioned in a prior note 3Com
switches. I recall we were having some problems with some 3Com switches some
time back. I wrote a script to create permanent arp entries for each of
these and it circumvented the problem. It must've been the level of code in
the 3Com switches because I no longer have to do this and haven't seen this
particular problem in some time now.
Blaine Owens
Eastman Chemical Company
Phone - (423)-229-3579
Fax - (423)-229-1188
bowens@eastman.com
> -----Original Message-----
> From: Leslie Clark [SMTP:lclark@us.ibm.com]
> Sent: Thursday, August 26, 1999 10:25 AM
> To: NV-L@UCSBVM.ucsb.edu
> Subject: Re: RES: ping response
>
> Marcos, this sounds reasonable to me, but I'm a software person. If this
> is what is going on, what should we be doing in Netview to make them come
> back as quickly as possible? Status polling is just doing a ping, which
> is
> apparently not enough. Force a new-node discovery poll? Is this related
> to the setting on the server's interface card regarding broadcast? I have
> recently been instructed by Support to make sure the Token Ring card
> has the 'confine broadcast to local token-ring' to 'no'. I have not
> checked
> that at the customer I mentioned in my other note who was having a
> similar problem.
>
> Cordially,
>
> Leslie A. Clark
> IBM Global Services - Systems Mgmt & Networking
>
>
>
> Frantsen
>
> This problems happens because when you4ve unpluged this port the entry in
> the switch ARP-table and Netview ARP-table were refreshed (possible
> deleted). Netview wasn4t able to translate IP to MAC and consequently
> wasn4t
> able to find the machine.
> When someone ping through another machine at the same segment, it4s
> generated a ARP broadcast to discovery the MAC, in that moment the switch
> and Netview make a new entry in your ARP-table. After that they are able
> to
> send any IP-packet to this machine.
>
> -----Mensagem original-----
> De: Frantsen Christian [mailto:cf@INTERNOC.SE]
> Enviada em: Quarta-feira, 25 de Agosto de 1999 06:26
> Assunto: ping response
>
>
> I noticed something strange the other day when trying some things in our
> lab.
>
> I unplugged a switch by removing the TP-cord and I got a node down in
> netview (obviously =))
> then I put the cord back in and I couldn't ping the switch from the
> netview
> map, there was no response,
> I got response from it if I pinged it from a machine right next to me, I
> tried again from netview, no response then I made a ping from the
> commandline on the netview-machine. Now i got a
> response and after that it worked from the map again.
>
> Anyone got some feedback on this?
>
> -----------------------------------------
> Christian Frantsen
> Technical Operations
>
> Internoc Scandinavia AB
> Tel: +46-36-194843
> Fax: +46-36-194651
> http://www.internoc.se
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