network issues?

[Kathleen]

I am trying to solve some problems on my email server (HP-UX 11.0). I serves as our external DNS and mail server (Openmail 7.0 with current patches) which runs through our firewall. Periodically I get errors where users can't signin using the Omgui client (they get a timed out error), and they can't ping the email server. They can ping other internal servers and access on those machines with our email web client. Many users (500+) are still able to access the server, using OMGUI, with no problem. I am trying various methods to test the problem and was wondering if you could help. This is the output of netstat -s. I see that some packets are dropped, could that be the issue? I was looking on the forums and it said to next check lanadmin -x lan0. I then get this as a result.....Invalid PPA Number entry. Is this the issue (or one of them) and if so, how do I fix it? Please advise.

[steven Burgess_2]

Hi Kathleen

With regard to checking your card via lanadmin

the PPA number for your card can be viewed when you go into lanadmin

#lanadmin

select lan you will get

LAN Interface test mode. LAN Interface Net Mgmt ID = 4

display

You will get the settings and statistics on your card

Have a look at the below link for checking configuration of your card

http://techsolutions.hp.com/fe/troubleshooting.html

and trouble shooting

You can also use nettl to check for any errors your network

nettfmt -t 30 /var/adm/nettl.LOG00 > /tmp/nettl.out

Errors in the above log are date stamped

HTH

Steve

[Kathleen]

nettfmt -t 30 /var/adm/nettl.LOG00 > /tmp/nettl.out

Gave me an error:
sh: nettfmt: not found.

[Jeff Schussele · Accepted solution]

Hi Kathleen,

With regard to the lanadmin command, you just need the PPA or instance # - so lan0 command would be:
lanadmin -x 0

If the command shows 10HD or 100HD then I'd get the card & it's hub/switch port set to 100FD AutoNegotiate Off for better performance. You'll almost always get collisions when running HD. So go 100FD for much better throughput.

Now if some OMGUI clients are timing out & are unpingable while hundreds of others are AOK, I'd suspect a network, firewall or client PC problem(s). You'd probably be able to narrow it down to one or more subnets & at that point I'd engage your network support or firewall team & have them start checking the appropriate routers, switches & firewalls.

If the problem was truly in the server i.e. a NIC then NOBODY would be able to access OpenMail.

Rgds,
Jeff

[Kathleen]

This is how it is set
100 Full-Duplex Auto-Negotiation-ON

So I am guessing we are good to go there.