[j-nsp] SRX650 Cluster throughput

[Jeff Rooney]

So I'm doing some testing with an SRX 650 cluster(11.2R6.3) and am
starting to see some odd throughput issues, being that this is my
first SRX cluster, I'm most likely overlooking something minor.

Physical setup is pretty basic, each srx has multiple links connected
into its own switch, as well as two cross connects between the pair of
SRX for control and fabric. The switches are connected with a 4 port
portchannel. All interfaces are gig and negotiated to 1000m. Switches
are catalyst 4948's, if that matters.

SRX-node0 ------------sw0
    | |                       | | |
SRX-node1 ------------sw1

I have two servers connected into sw0, when on the same vlan iperf udp
tests show 900Mbits/sec and tcp tests show 940+Mbits/sec....so far so
good. Moving one box to another vlan and a seperate reth, so traffic
now traverses srx-node0...traffic plummets. Iperf udp shows
500Mbits/sec and tcp 317Mbits/sec. Prior to setting up the cluster I
tested via a single SRX and saw 900Mbits/sec+ for both tcp and udp.
Both hosts are on the same switch and traversing node0 which is also
on the same switch. Each vlan terminates on its own reth.

Any suggestions as to where to look next?