On Wed, Aug 20, 2008 at 09:03:40AM -0000, Rob Epping wrote: > Hello list, > > I've been searching a while for this some time now, but can't seem > to find the solution. > I'm not even sure this is the right list but I guess there are more > people on this list who ran into the issue. > > The issue is with UDP (and probably other (semi-)stateless) services > (like SNMP). > When an SNMP query is done on the cluster(/virtual) IP the responses > are send with source-IP set to the IP address of the > master(/active) node. > > How can this be resolved?
use a more recent net-snmp. I patched this (sort of hackish) two years ago, they finally ended up using a less hackish patch to fix it. since at least september 2006, net-snmp sends answers back on the IP the request was received on, unless otherwise specified (explicit client address given). > In a packet capture it looks like this: > > client: x.y.z.10 > cluster ip: x.y.z.20 > current master: x.y.z.21 > > from port to port remark > x.y.z.10 1234 x.y.z.20 161 SNMP request to > cluster > x.y.z.21 161 x.y.z.10 1234 SNMP reply from > master -- : Lars Ellenberg : LINBIT HA-Solutions GmbH : DRBD®/HA support and consulting http://www.linbit.com DRBD® and LINBIT® are registered trademarks of LINBIT Information Technologies GmbH _______________________________________________ Linux-HA mailing list [email protected] http://lists.linux-ha.org/mailman/listinfo/linux-ha See also: http://linux-ha.org/ReportingProblems
