CLUSTER INTERCONNECT WITH two interfaces, HOW it WORKS???
604957Jul 9 2008 — edited Jul 12 2008Hi,
I have a 3-node RAC with a double (physical) interface configured as cluster_interconnect
bge2/10.0.0.25:cluster_interconnect
bge3/10.0.0.26:cluster_interconnect
connected to a Gigabit switch
I got through a failure on one CABLE attached on the switch. What happened is that the instance
crashed down after a while saying it could not communicate with other nodes (LMON shutted down the instance in fact), even though the other interconnection was working (only one was in place at the moment of failure)
My question is, considered there is no IP MultiPath nor trunking feature, i was just wondering how RAC treats the two physical interconnects ?
- the GC traffic is spread among the two (doubling the data on the network) and without any failover.
the two interfaces are needed to be up both even there's no bandwidth growing
- the GC traffic is double-band because of the two 1Gb ethernet connection resulting in 2Gb bandwidth
- the GC traffic is failed over one Interface in case of a failure of the other (in this case, why my instance felt down?)
Thanks to any of you that can make this point clear
Simone