topic Re: Logical interface dies in Operating System - HP-UX

Logical interface dies

Leon van Ofwegen_1 — Tue, 11 Mar 2003 09:35:56 GMT

I've got a N4000 with an internal NIC.

One hard ip (10.1.1.15/255.255.255.0)
One virtual ip
(10.1.1.17/255.255.255.0)

Duplex is set the same at both sides (switch/nic).

A couple times per day, the virtual interface goes down. When I do an
ifconfig lan0:1 down
ifconfig lan0:1 up

It works again. I've disabled the dead gateway detection.
(ndd -get /dev/ip ip_ire_gw_probe = 0)

Don't see any errors in syslog.

Thnx

Leon

Re: Logical interface dies

Robert-Jan Goossens — Tue, 11 Mar 2003 09:47:53 GMT

Hi Leon,

Do you have a A3738A LAN Adapter, then check this patch

http://www4.itrc.hp.com/service/patch/patchDetail.do?patchid=PHNE_26250&context=hpux:800:11:00

Hope it helps,

Robert-Jan.

Re: Logical interface dies

Leon van Ofwegen_1 — Tue, 11 Mar 2003 09:53:14 GMT

No it is the build in network card of the N4000 (core I/O board: A3639A-60001

ioscan -fnC lan

lan 0 0/0/0/0 btlan CLAIMED INTERFACE HP PCI 10/100Base-TX Core
/dev/diag/lan0 /dev/ether0 /dev/lan0

Regards,

Leon

Re: Logical interface dies

Leon van Ofwegen_1 — Tue, 11 Mar 2003 09:58:24 GMT

BTW, OS is 11.11 with latest gold pack (GOLDAPPS11i B.11.11.0212.4 Gold Applications Patches for HP-UX 11i, December 2002
GOLDBASE11i B.11.11.0212.4 Gold Base Patches for HP-UX 11i, December 2002)

Regards,

Leon

Re: Logical interface dies

Robert-Jan Goossens — Tue, 11 Mar 2003 10:17:19 GMT

Hi Leon,

thinking about the "keep alive" options, take a look at next answer from Eran Maor

http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0xda90663ce855d511abcd0090277a778c,00.html

Regards,

Robert-Jan.

Re: Logical interface dies

Adam J Markiewicz — Tue, 11 Mar 2003 10:30:45 GMT

Both IPs from the same subnet?

How is your routing supposed to chose what should go 'directly' and what should go 'virtually'?

I guess that this can introduce some confusion and as following step can cause your troubles.

Good luck

Adam

Re: Logical interface dies

Leon van Ofwegen_1 — Tue, 11 Mar 2003 10:47:30 GMT

I don't think it's a keep alive issue, because the server is in use (Oracle Email Server). Clients are checking mail (imap) every minute over that virtual interface.

Regards,

Leon

Re: Logical interface dies

Leon van Ofwegen_1 — Tue, 11 Mar 2003 10:49:26 GMT

netstat -rn:

Routing tables
Destination Gateway Flags Refs Interface Pmtu
127.0.0.1 127.0.0.1 UH 0 lo0 4136
10.1.1.15 10.1.1.15 UH 0 lan0 4136
10.1.1.17 10.1.1.17 UH 0 lan0:1 4136
10.1.1.0 10.1.1.15 U 3 lan0 1500
10.1.1.0 10.1.1.17 U 3 lan0:1 1500
127.0.0.0 127.0.0.1 U 0 lo0 0
default 10.1.1.253 UG 0 lan0 0

Regards,

Leon

Re: Logical interface dies

Adam J Markiewicz — Tue, 11 Mar 2003 11:32:12 GMT

Hi Leon

>>
10.1.1.0 10.1.1.15 U 3 lan0 1500
10.1.1.0 10.1.1.17 U 3 lan0:1 1500
<<

Quite a puzzle for HP.
HP doesn't like such puzzles.
Change at least one subnet somehow.

Good luck

Adam

Re: Logical interface dies

Leon van Ofwegen_1 — Tue, 11 Mar 2003 15:04:14 GMT

Thanks for the response, tonight, I will migrate all services to the singel hard ip address.

Regards,

Leon

Re: Logical interface dies

rick jones — Wed, 12 Mar 2003 20:06:42 GMT

Multiple logical interfaces in the same IP subnet should be just fine under UX. What gets dodgy is having multiple _physical_ (from the standpoint of the transport) interfaces configured into the same subnet.

Before you down/up the logical interface, does ifconfig show it to be in the UP or the DOWN state? You might also look at ndd -get /dev/ip ip_ill_status and perhaps ip_ire_status

Re: Logical interface dies

Leon van Ofwegen_1 — Wed, 12 Mar 2003 22:46:16 GMT

That was what I thought as well. But the problem is, it's a production server, so I can not experiment with it. I've put it all on one ip. To bad, when I have time and resources, I will investigate this problem further.

Thnx,

Leon

Re: Logical interface dies

Ted_5 — Fri, 04 Apr 2003 18:17:25 GMT

We have a similat problem with more than 1 HPux 11.11

All have the GOLDPK11i_11-dec02.depot

they run and every day or so, drop off the net.

ifconfig shows UP and every think looks fine except no network trafic. Unplugging the NIC and plugging it back in does not help.

If we do a landiag reset the network coms back and all is well. We need to do this ever day or so.

ioscan -nfC lan
HP PCI 10/100Base-TX Core
/dev/ether0 /dev/lan0

uname -a
HP-UX B.11.11 U 9000/800 1186971557

any ideas??
as I said this is more than 1 system...

Thanks

Ted

Re: Logical interface dies

Jakes Louw_1 — Tue, 27 May 2003 08:28:26 GMT

I've got a similar problem on on of our 11.11 V2500s, running this card. Server just drops off the network, ifconfig shows UP, subnet ping gets nothing but it own IP. Ifconfig down/up leaves the card down. Checks on the Cisco CAT show that the MAC address has mysteriously vanished. Server recovers after a reboot. LANADMIN stats show nothing, nor does STM, DMESG, SYSLOG, or anything else. Very perplexing.