[Pacemaker] Unable to ping cluster Virtual IP address from different subnet

[ppking123 ppking123]

Hi,

I searched the pacemaker mailing list archive but unable to find the
information (The closest thread that I can find is
http://www.mail-archive.com/pacemaker@oss.clusterlabs.org/msg08643.html)

I have setup a Linux cluster with Corosync/Pacemaker, and the two cluster
nodes are within the same subnet sharing a virtual IP. For machines within
the same subnet, they can ping the virtual IP "135.121.192.104"
successfully.

However, if I tried to ping the virtual IP "135.121.192.104" from the
machine from a different subnet, then it does not respond to my ping. The
other machines resides on the subnet "135.121.196.x".  Note that I was able
to ping the individual nodes IP addresses from the different subnet
successfully, it is just the virtual IP does not work.

On my machines, I have the following subnet mask in my ifcfg-eth0 file:

NETMASK=255.255.254.0

and below is my output for the crm configure show:

[root at h-008 crm]# crm configure show
node h-008 \
        attributes standby="off"
node h-009 \
        attributes standby="off"
primitive SampleClusterIP ocf:heartbeat:IPaddr2 \
        params ip="135.121.192.104" cidr_netmask="23" \
        op monitor interval="30s" clusterip_hash="sourceip"
clone SampleClusterIP2 SampleClusterIP \
        meta globally-unique="true" clone-node-max="2"
property $id="cib-bootstrap-options" \
        dc-version="1.0.11-1554a83db0d3c3e546cfd3aaff6af1184f79ee87" \
        cluster-infrastructure="openais" \
        expected-quorum-votes="2" \
        no-quorum-policy="ignore" \
        stonith-enabled="false"
rsc_defaults $id="rsc-options" \
        resource-stickiness="100"

and the output of the crm_mon status:

[root at h-009 crm]# crm_mon status --one-shot
non-option ARGV-elements: status
============
Last updated: Thu Jun 23 08:12:21 2011
Stack: openais
Current DC: h-008 - partition with quorum
Version: 1.0.11-1554a83db0d3c3e546cfd3aaff6af1184f79ee87
2 Nodes configured, 2 expected votes
1 Resources configured.
============

Online: [ h-008 h-009 ]

 Clone Set: SampleClusterIP2 (unique)
     SampleClusterIP:0     (ocf::heartbeat:IPaddr2):       Started h-008
     SampleClusterIP:1     (ocf::heartbeat:IPaddr2):       Started h-009

I am new to the Linux HA cluster setup, and unable to find out the root
cause for the issue. Is there any configuration I can check to diagnose this
problem?
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