Forum Discussion

mmilano's avatar
mmilano
Level 3
14 years ago

VCS problem with virtual IP during failover

I have a two node cluster with a bonded VIP.  From a server outside the subnet I can ping the IP address assigned to the interface while on Node A.  When I failover to Node B I am no longer able to p...
business continuity
Cluster Server
Tip-How to
Troubleshooting
  • mmilano's avatar
    mmilano
    14 years ago

    After working with Veritas and Redhat, we have concluded that the problem is our router does not reply to "ARP REPLY" type Gratuitous ARP packets.  This is the default behavior for VCS.  We had to modify the 'online' script within VCS so that it sends out "ARP REQUEST" type Gratuitous ARP packets.

    Here is the modification we had to make to /opt/VRTSvcs/bin/IP/online:

     

        `$arping -A -c 5 -I $Device $Address`;
     
    to
     
        `$arping -U -c 5 -I $Device $Address`;
     
    Thank you all!
mmilano's avatar
mmilano
Level 3
14 years ago

After working with Veritas and Redhat, we have concluded that the problem is our router does not reply to "ARP REPLY" type Gratuitous ARP packets.  This is the default behavior for VCS.  We had to modify the 'online' script within VCS so that it sends out "ARP REQUEST" type Gratuitous ARP packets.

Here is the modification we had to make to /opt/VRTSvcs/bin/IP/online:

 

    `$arping -A -c 5 -I $Device $Address`;
 
to
 
    `$arping -U -c 5 -I $Device $Address`;
 
Thank you all!