topic Re: Process trouble network in Operating System - HP-UX

Process trouble network

PAVIC Thierry — Wed, 29 May 2002 12:21:06 GMT

On my system i have two lan cards. One is up the other is down but in my syslog.log I can read this message:
May 29 15:22:06 grenat vmunix: btlan4: NOTE: Link Partner does not support Auto
Negotiation
May 29 15:22:06 grenat vmunix: btlan4: NOTE: MII link down, try AUI at 10/12/1/0
....
May 29 15:22:12 grenat vmunix: btlan4: timeout: DMA timeout occurred at 10/12/1/
0
May 29 15:22:12 grenat vmunix: btlan4: reset state is 226 at 10/12/1/0....
May 29 15:22:12 grenat vmunix: btlan4: WARNING: AUI Loopback Failed at 10/12/1/0
....
May 29 15:22:12 grenat vmunix: btlan4: NOTE: Retry Reset at 10/12/1/0....
May 29 15:22:12 grenat vmunix: btlan4: Hardware Reset Started on 10/12/1/0....Th
is will take approximately 11 seconds
This message is put in the syslog.log every time.
What's the solution to abort this message
Regards

Re: Process trouble network

PIYUSH D. PATEL — Wed, 29 May 2002 12:27:07 GMT

Hi,

was the other lan card working fine earlier ?? If so then you can try a RESET of the lan card using landiag.

You can also check for the loose connections, cable connections and the switch settings to which it is connected. The lan card and switch speed should be the same.

ioscan -fn |grep lan....what is the output for btlan4.

Piyush

Re: Process trouble network

Rita C Workman — Wed, 29 May 2002 12:33:49 GMT

Could be somebody is unplugging/replugging something .. or maybe you need to check and ensure your card is properly defined in your /etc/rc.config.d/hpgsc100conf file (for btlan4)

Also check and make sure your card and your switch are set at the right speed. I prefer 100FD and AutoNeg OFF. Make sure both are set the same.

Just a thought,
Rita

Re: Process trouble network

PIYUSH D. PATEL — Wed, 29 May 2002 12:40:11 GMT

Hi,

To change the speed settings

lanadmin -X 100FD ppa # or NMID # for lan 0

lanadmin -x ppa # show you current speed on the card

netstat -in
would show you ppa# or NMID # for btlan4.

Piyush

Re: Process trouble network

Wilfred Chau_1 — Tue, 04 Jun 2002 04:23:38 GMT

What do you have in your hppci100conf in /etc/rc.config.d/?

Do you need to plug/unplug an AUI device
all the time?

Re: Process trouble network

sven verhaegen — Tue, 04 Jun 2002 11:17:17 GMT

Hi

the message series you are seeing here are logical result of speed sensing and duplex negotiation mismatch , to clarify this

speed sensing :

in this case the card itself will go onto the physical cable and 'sense' the speed it runs , either 10 or 100Mb by analysing the hqartbeat signal provided by the other side (if that doesn't exist it will de-activate the card and retry after a fixed (small) interval to re-activate the card)it will force the cards speed at that setting

Duplex Negotiation :

In this case we get into a peer-to-peer negotiation sequence meaning that the card itself will send a packet to the other side requesting negotiation , the other side should do the same , if both reply correctly they then decide on the highest possible setting being FULL-DUPLEX .. if negotiation fails (several reasons are possible)several states of he card can be possible , this negotiation ask that not only the HP is capable of doing so but also the switch/router the system is connected to , if that isn't the case the negotiation will fail and depending on the driver version (make sure the latest arpa transport and lancard patch is installed) this could hang the card or more often result in factory default setting being 100HalfDuplex or 10HalfDuplex depending on the speed sensing

If duplex is completely mismatched then we can have any number of performanceor communication problems so the general rule is

HP9000 switch/router

AUTO ok AUTO
Fixed FD ok Fixed HD
Fixed FD ok Fixed FD

AUTO nok fixed
fixed nok AUTO

in the 2 last cases you will either fall back to 100MB/HD or get a card hang (with older unpacthed card software versions) , the message in your log indicates that the negotiation does fail so make sure you use the correct setting , take note that if you have a HUB it isn't capable of negotiating and is most probably HalfDuplex , fixing the speed at the HP9000 happens in the /etc/rc.conf/d subdir in a file specifically for tyour lancard , these fales have the same naming policy and that policy = hp...conf

e.g hpeisa100btconf

in there one can change the cards mac-address but also put speed and duplex for the card , the correct options to do so are :

100FD
100HD
10FD
10HD
AUTO

(by default the cards are in AUTO)
If you later to a fixed setting make sure the port on the switch/router is set in exactly the same way , finally the message could be coming from the disactivated card if that is also a 100mb type of card , it can give that signal atr startup because even if no configuring happens it will poll the network to see if it is connected to a hub, switch or router