arp problems

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From - Mon Aug 23 06:48:48 1999
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From: jeffl@comix.santa-cruz.ca.us (Jeff Liebermann)
Newsgroups: comp.unix.sco.misc
Subject: Re: RPC & Probs with arp -s
Date: Mon, 23 Aug 1999 04:16:27 GMT
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On Sun, 22 Aug 1999 21:04:06 +0100, "Laurence Glew"
<Laurence.Glew@visionexpres.com> wrote:

>All I'm typing is arp -s 215.11.66.20 [mac address].

OK.  Let's start over.

Missing Information:
  Patches and fixes added to 3.2v5.0.4.  (customquery listpatches)
  Details on portmapper error.
  
1.  What does:
        arp -a
belech?
2.  Is there an existing arp entry for the IP address you're trying to
map?

I'm trying to figure out why you need to map the MAC address manually
in the first place.  If you just ping the router, the MAC address
should appear in the arp table without exernal assistance.

>I can ping the NT box, but the first two pings take a collective 5 seconds.
>I've run traceroute and the first hop is indeed the router, but it's getting
>as far as the router then it's getting lost.

OK.  Now, I'm lost.  If this is an ethernet to ethernet type of
router, then you have *TWO* MAC addresses to deal with (one each for
each ethernet interface).  Whether you see the other MAC address on
the other side of the router is totally dependent on whether you have
bridging turned on in the router.  I don't see why you should have
bridging on, so you'll only see one MAC address.  Since I have no clue
as what brand or flavour of router, I can't offer specifics.
2Mbits/sec would probably be an RF wireless bridge.  Details (I'm
curious).

>Oh the joys of an SAP migration !!!.....

Sheesh.  You have it easy.  I did a conglomeration of two companies
sharing a common server, where neither company wanted to change IP
addresses.  Two ethernet cards in every server in the place with
routeing disabled.  I'll trade you nightmares any time.

>box but I'm getting the following error: "Set: can only proxy for
>215.11.66.20" .
>What does this mean?  Why can't I add this perm.arp entry?

I dunno.  Nothing in the SCO docs.  I can't even figure out where the
error is coming from.  Any chance you have the Netscape Proxy server
running on OSR5?

>I'm assuming my RPC portmapper errors are because of this.

What error?  I'll assume it's the SCO Unix box.  Exact error please
and no paraphrasing.  At what point does the error appear?  Startup or
when you run arp?

With all due respect, you're not supplying enough information for a
decent answer.  However, I do have some guesses.  I'll *ASSUME* that
the SCO Unix box and it's friend the router were working as expected
prior to the addition of the NT server.

Look in:
   c:\winnt\system32\etc\hosts
   c:\winnt\system32\etc\lmhosts
and see if there isn't some residue from the previous IP addresses.
Also check if DNS, WIN and DHCP do not have some residue.

Check the OSR5 box for the Netscape Proxy server and kill it.


-- 
Jeff Liebermann  150 Felker St #D  Santa Cruz CA 95060
(831)421-6491 pgr (831)426-1240 fax (831)336-2558 home
http://www.cruzio.com/~jeffl   WB6SSY
jeffl@comix.santa-cruz.ca.us   jeffl@cruzio.com

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