topic Re: arp command in Operating System - HP-UX

arp command

deepu — Wed, 24 Sep 2003 02:22:02 GMT

Trying to change host's ARP table to add a mapping from the IP address I want to assign to the print server's Ethernet address. I am using arp command:
arp -s 80.0.0.235 0:40:05:4a:81:a7
but error is there :
SIOCSARP: Invalid argument
How to overcome this error?

Re: arp command

twang — Wed, 24 Sep 2003 02:41:31 GMT

Try applying the latest arp patch
http://www2.itrc.hp.com/service/patch/patchDetail.do?patchid=PHNE_21184&context=hpux:800:11:00

Re: arp command

deepu — Wed, 24 Sep 2003 08:08:35 GMT

Hi,
I have downloaded the patch and installed it and also rebooted the server.
But still the same error is coming.
SIOCSARP:Invalid argument.

Re: arp command

Zeev Schultz — Wed, 24 Sep 2003 08:39:50 GMT

1)Does it happen for any arp entry you add? (Try to add another one)
2)Is "80.0.0.235" shown when "arp -a" run?With or without MAC address?

Re: arp command

Patrick Wallek — Wed, 24 Sep 2003 08:48:07 GMT

Part of your problem may be that you are using a '0' subnet. By default HP-UX does not allow you to use 80.0.0. There is an NDD setting that you need to change to allow that.

This may not be your problem, but it is possible.

Re: arp command

Zeev Schultz — Wed, 24 Sep 2003 09:09:56 GMT

Hm,that address 80.0.0.235 is not accessible via current routing table I guess (netstat -rn)?

Then add a host route :
route add host 80.0.0.235 .Then add
entry to arp cache.

Zeev

P.S no ndd parameter on the 0.0 issue that I saw :)

Re: arp command

deepu — Thu, 25 Sep 2003 04:57:16 GMT

Hi Zeev,
Not able to add in route table.
#route add host 80.0.0.235 70.0.0.106
add host 80.0.0.235: gateway 70.0.0.106: Network is unreachable

Re: arp command

Zeev Schultz — Thu, 25 Sep 2003 06:24:40 GMT

And I assume that 80.0.0.235 is somewhere not in your LAN (ie behind a firewall) so no routing is to there?

By the way,can you see the entry with arp -a
or "ndd -get /dev/arp arp_cache_report | grep 235"?

Re: arp command

deepu — Wed, 01 Oct 2003 01:59:17 GMT

Thanks Zeev, problem resolved..

--Deepu