Network is slow on Compute Node of Two Node IceHouse Neutron OVS&VLAN CentOS 6.5 (Fedora 20) Cluster
Both Nodes are KVMs with 2 VCPUS and 4 GB RAM running at F20 KVM Server
(on non-default Libvirt subnet 192.169.142.0/24)
When I deploy two Cirros instances :-
First instance on Controller ( which also runs nova-compute)
Second instance on Compute.
Ping,traceroute,nslookup ( ICMP based utilities) work with Internet with the same speed on both nodes
When I try `curl http://lxer.com` :-
1. It takes seconds on instance deployed on Controller
2. It takes 2-3 min on instance deployed on Compute
For Cirros VM1 running on Controller node there is corresponding qvb-xxxxxx & qvo-xxxxx veth pair
For Cirros VM2 running on Compute node there is corresponding qvb-yyyyy & qvo-yyyyy veth pair
So, run on Controller `tcpdump -vv -i qvo-xxxxxx | tee log.controller`
and on Compute `tcpdump -vv -i qvo-yyyyy | tee log.compute`
Same setup has been done for Two Node IceHouse Neutron OVS&VLAN Fedora 20 Cluster with same issue and same workaround
Attached report is,actually, log.controller versus log.compute
TCPDUMP Contr-VS-Compute
Answer file not yet updated for non-default Libvirt Subnet