[ClusterLabs] Antw: Regarding IP tables and IP Address clone

[Michael Schwartzkopff]

Am Mittwoch, 23. Dezember 2015, 12:28:06 schrieb Ulrich Windl:
> >>> Somanath Jeeva <somanath.jeeva at ericsson.com> schrieb am 23.12.2015 um
> >>> 06:01 in
> Nachricht <4F5E5141ED95FF45B3128F3C7B1B2A6721ABE07B at eusaamb109.ericsson.se>:
> > Hi ,
> > 
> > Thanks for the quick reply.
> > 
> > I will check with our IT team regarding the multicast MAC at switch level.
> > 
> > But the Virtual IP is reachable for 15 minutes or so after I start the
> > pacemaker/Corosync service. After which it becomes unreachable. However
> > when I restart the iptables service it becomes reachable again for
> > another 15 min.
> It could be some ARP cache problem. Maybe watch it.

Please check the ARP tables of your switches / routers. IP address clones use 
multicast MAC addresses for the unicast IP address. Some switches (esp Cisco) 
do not like that. You would have to configure the MAC addresses manually.

Mit freundlichen Grüßen,

Michael Schwartzkopff

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