Setting up HP SIM 5.x on an HP-UX Serviceguard Cluster (448492-002, February 2008)

Troubleshooting



Reminder: Please note that process like

mxdomainmgr

might

take some time to s

tart (up to

two

minutes on minimum platform requirements based machine). As a consequence, do not try to logon

into HP

SIM right after Serviceguard Manager shows the package up and take these minutes into

account when testing failover scenarios. Note also

that the sleep timer (within the

sgsim

script)

might need changes in order to fit the failover process.



SNMP communications: As SNMP uses the User Datagram Protocol (UDP) as the transport protocol

for passing data between managers and agents, HP SIM had

an issue in the clustered

configuration, as it was using the real IP address instead of the virtual one for answering back on

UDP requests. We needed to involve address translation on the UDP packets in order to make it

work. We used the embedded kernel fi

rewall stack of Linux to achieve it. You must SNAT the

udp

packets in order to make it work, by using the

iptables

command as follows:

Add the following line to the

/etc/rc.local

file on each node:

iptables

t nat

A POSTROUTING

p udp

j SNAT

sour

ce 192.168.

.10

(the cluster IP Address)