Network down due to a HP-ux server .

[Shashikiran_1]

Hi,

We are facing a problem with HP-UX machine(HP-UX ver 11i on 720 series machine) after power failure. The sever will boot normally , But it sends broadcast packets to all over network continuously which will cause network down. If I remove its LAN cable from the server , the network will come up.

How can I stop this broadcast packets. ? Last month also it was giving the same problem .I had changed the IP and it was working. I am getting this type of problem after loading HP_UX ver 11i.


I can watch broadcast packets using tcpdump or snoop.

output of snoop is given bellow :



hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?
hp-serv11 -> (broadcast) ARP C Who is 192.168.142.252, hp-serv13 ?


Checked Netmask,default router and it is correct.

Can anyone help on on this?

Thanks in advance

[melvyn burnard]

well the first item to check is that you have the latest patch bundle installed, but more to the point, if thi sis indeed a 9000/720 workstation, it is not supported on HP-UX 11i.

[Alessandro Pilati]

Shashikiran,
please post
/etc/rc.config.d/netconf

lanscan

ifconfig lan0

ioscan -fnC lan

Another question:
is hp-serv13 a BOOTP server?

Regards,
Alex

[RAC_1]

See following thread.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=133478

[Florian Heigl (new acc)]

what happens if You create a static arp entry for the host in question? is there any visible traffic between hp-serv13 and 192.168.142.252.

Unfortunately I don't know of any way to limit arp requests, but in general You'll only see this request in response to some other traffic originating by the 192.something host.

[Shashikiran_1]

Hi ,

hp-serv13 is not a boot server . I have added a static arp entry for this host . Now it is trying for oher host.

I have changed the IP addr of this host , It was working fine.

#lanscan
Hardware Station Crd Hdw Net-Interface NM MAC HP-DLPI DLPI
Path Address In# State NamePPA ID Type Support Mjr#
8/0/20/0 0x00108335AB51 0 UP lan0 snap0 1 ETHER Yes 119

# ifconfig lan0
lan0: flags=843
inet 192.168.142.252 netmask fffffc00 broadcast 192.136.142.255

# ioscan -fnC lan
Class I H/W Path Driver S/W State H/W Type Description
=====================================================================
lan 0 8/0/20/0 btlan CLAIMED INTERFACE HP PCI 10/100Base-TX Core
/dev/diag/lan0 /dev/ether0 /dev/lan0

[rick jones]

was this machine doing any NFS, and in particular, taking part in locking protocols? if so, you may want to search on things like "statd" and lockd and the like - may also see that daemon taking a bit of time on the system.

also, just how fast are these ARP requests being sent anyway? unless the machine is going ape sending them all, other systems on the network should not be especially affected.

and to reiterate what was said previously - HP-UX 11i is _NOT_ supported on a 9000/720...

Supported, known to work -> warm fuzzies all around
Supported, not known to not work -> an HPite may be in trouble
Supported, known to not work -> an HPite is in trouble
Unsupported, known to work -> lucky today, unlucky tomorrow?
Unsupported, not known to not work -> there but for the grace of Turing
Unsupported, known to not work -> no, it was not deliberate ;-)