MC/SG netmask for package IP address

[Slawomir Gora]

Hello,

I'd like to set package IP address which
not belongs to any existing subnets on system,
everything is OK but I don't know howto
set netmask for that IP ?

subnets:
lan1 192.168.1.0 255.255.255.0
lan0 10.0.10.0 255.255.0.0

in package configuration I have:

IP[0]="10.0.10.71"
SUBNET[0]="10.0.0.0"

IP[1]="172.30.2.42"
SUBNET[1]="10.0.0.0"

netstat -in
lan0:1 1500 10.0.0.0 10.0.10.71
lan0:2 1500 172.30.0.0 172.30.2.42
lan0 1500 10.0.0.0 10.0.10.211

ifconfig lan0:2
inet 172.30.2.42 netmask ffff0000 broadcast 172.30.255.255

howto set netmask for lan0:2 - I need 255.255.255.240

[G. Vrijhoeven]

Hi,

I think it is not possible. If you perform a checkconf i think servicegaurd will reply with 10.0.0.0 is not a part of cluster...

Gideon

[Mark Grant]

This won't work. You can't have a different subnet on the same card.

[Ashwani Kashyap]

Since the package IP is bpund to one of the primary or standby interfaces that is defined in the clusterascii file , it will belong to the subnet of that interface . You cannot change it .

[Slawomir Gora]

I have tried such setting

IP[1]="172.30.2.42"
SUBNET[1]="10.0.0.0"

and it works, lan failover works to,
but my problem is howto set netmask !!!

[Mark Grant]

OK try this and watch it break.

In your package control file run "ifconfig" manually in the package startup scripts. This will change the netmask on the interface. I wont guarantee that you'll be able to log in and check though.

[Bernhard Mueller]

Slawomir,

Mark is right, you cannot have two different netmasks on the same card.

So either this:
lan0 with 10.0.10.0 and 255.255.252.240
(which in turn should not work either)

or
lan0:2 with 255.255.0.0

that's it. It can happen (since as you know by now that you cannot set a netmask for the package IP), that MC/SG muddles up your desired netmask; then you could use my
setmask.sh script as a customer_defined_run_command in your package control script.

#######################################
#!/bin/sh
#
# Script for use in MC/SG to set correct subnet mask
# for non-default network masks
# run as "customer_defined_run_command"
#
LANG=C
PATH=/usr/bin:/usr/sbin:/sbin:/usr/contrib/bin
#
# enter package IP address and subnet mask
IP=10.2.4.70
NETMASK=255.255.252.0
#
# check that IP is correct:
if [ `netstat -rn | grep -c $IP` -eq 0 ] ; then
echo "\nWARNING IP address $IP is NOT in use"
echo "Check $0 and Package Config for consistency\n"
exit 1
fi
# this sets correct netmask
INST=`netstat -rn | grep "^${IP}" | awk '{print $5}'`
ifconfig $INST inet $IP netmask $NETMASK
exit
############################################


Regards,
Bernhard