GRE traffic stopped working between XenServer hosts after reboot

[Shanker Balan <sh...@shapeblue.com>]

Hi Guys,

This is probably more XenServer related than CloudStack…

What was NOT working after the reboot:

- Traffic between VMs on XS1 and XS2

What was still WORKING after the reboot:

- Traffic between VMs on the same XS host

What I verified:

- "ovs-vsctl show" shows that the tunnel has been established between XS1 and XS2
- "ovs-dpctl dump-flows" shows flows being established when I start a ARP or a ping
   between VMs across XS hosts. However, they appear to be in "drop" action.

[root@vXen-2-1 ~]# ovs-dpctl dump-flows xapi2
in_port(3),eth(src=02:00:51:da:00:03,dst=02:00:72:bf:00:02),eth_type(0x0806),
arp(sip=10.1.1.56,tip=10.1.1.1,op=2,sha=02:00:51:da:00:03,tha=02:00:72:bf:00:02),
packets:23, bytes:966, used:0.580s, actions:drop

Traffic between XS hosts started working after a "/etc/init.d/openvswitch restart" on the XS1. No restart
was required on XS2.

Anyone seen this issue before?

Regards.


--
@shankerbalan

M: +91 98860 60539 | O: +91 (80) 67935867
shanker.balan@shapeblue.com | www.shapeblue.com | Twitter:@shapeblue
ShapeBlue Services India LLP, 22nd floor, Unit 2201A, World Trade Centre, Bangalore - 560 055

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