Re: Ping returning wrong address

[<KMort@xxxxxxxxxx>]

It would be a good practice to always set the name server search to *LOCAL
from CHGTCPDMN. This will always hit the 400 host table first before going
out to a remote name server. This could also be an issue however, if you
have an entry in the host table AND one on DNS...you would need to update
both locations if something changes.

It is also recommended that besides making sure you specify the TCP address
specifically (which I would think you have done by saying that each server
has its own address) in the notes.ini file - for example:

TCPIP_TcpIpAddress=0,10.23.224.170:1352

Lastly it is further recommended that you do have host table entries not
only for the fully qualified name of the 400 but also the Domino servers.

This avoids confusion if your remote DNS servers may not have totally
updated with new info or you have a cache issue. For internal system
communications, the host table is better than a remote server. In fact
certain parts of MGTC may fail simply due to the fully qualified name of
the 400 not being in that host table.


---------------------
Kevin E. Mort
iSeries Technical Support
Support Net, Inc.
Ph: 888.480.TECH
Fx: 954.428.3991
Mailto:kmort@supnet.com

IBM Certified Expert - e(logo)server iSeries 400 Technology
Lotus Certified Specialist

" i want everything to work. i choose iSeries. "



<SNIP>
--__--__--

Message: 5
Date: Thu, 29 Nov 2001 10:23:55 -0600
From: "Chris Beck" <CBeck@good-sam.com>
To: <midrange-l@midrange.com>
Subject: Re: Ping returning wrong address
Reply-To: midrange-l@midrange.com

--
Ask the Cisco kid what the TTL is.  This is on the DNS.

On the OS/400, you can forceably clear the cache with CHGTCPDMN.  You can
also disable the cache in V5R1

>>> rob@dekko.com 11/28/01 03:16PM >>>

Where is this cache?  On the 400 or the DNS?  The Cisco kid said there was
a 20 min cache.  I waited longer than that.

Rob Berendt

==================
"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety."
Benjamin Franklin



                    KirkG@PacInfoSys.co
                    m                         To:
midrange-l@midrange.com
                    Sent by:                  cc:
midrange-l@midrange.com, midrange-l-admin@midrange.com
                    midrange-l-admin@mi       Fax to:
                    drange.com                Subject:     Re: Ping
returning wrong address


                    11/28/2001 02:16 PM
                    Please respond to
                    midrange-l






Rob, I agree with Jeff. The AS/400 follows the standard when it come to
How Long to cache the DNS info for an address. Windows for example ignores
the time-out value and will Always do a look-up. When the DNS info is sent
to a computer, along with it is a value that tells the computer how long
to use its cached info for that address. The iSeries does what is told. If
the data time-out is set to 5mins or indefinitely that's what it will do.
Find out what the time-out is set to.



---------------------------------
Kirk Goins
IBM Certified AS/400 Technical Solutions
Pacific Information Systems - An IBM Premier Business Partner
503-674-2985           kirkg@pacinfosys.com
"WE KNOW TECHNOLOGY"
---------------------------------





rob@dekko.com
Sent by: midrange-l-admin@midrange.com
11/28/2001 08:35 AM
Please respond to midrange-l


        To:     midrange-l@midrange.com
        cc:
        Subject:        Ping returning wrong address



We have multiple IP addresses set up in our TCP/IP interfaces on this one
400.  Each Domino server has it's own.  Well the NT people here got cute
and used one of our IP addresses for one of our Domino servers and set
that
up in the DNS for the 400 itself.  10.10.1.186 is for the Domino server
GDSHELP.  10.10.1.123 is for the 400 GDIMAIL.  But I ping GDIMAIL from
elsewhere and it went to 10.10.1.186.  Well, I got the Cisco kid to fix
the
DNS.  Now when I ping GDIMAIL from my PC I get 10.10.1.123.  However when
I
ping GDIMAIL from another 400 it still goes to 10.10.1.186.  I checked the
host table on the source 400 and there is no GDIMAIL, no GDSHELP and no
10.10.1.186.  I checked out the address of the DNS using 12. Change TCP/IP
domain information and it matches the address of the dns from my PC.  So I
tried adding a host table entry for 10.10.1.123 to GDIMAIL.  Now when I
ping GDIMAIL it works.  I removed the host table entry and it goes back to
10.10.1.186.  Is there some sort of cache or am I missing something?

I'll probably leave the host table in for a workaround.

</SNIP>