Physical Network Interface (NIC) Ceases To Route Following Large Transfer Of Data By VM Guest (Doc ID 1262744.1)

Last updated on MAY 23, 2023

Applies to:

Symptoms

After the large transfer of data from a VM, the xenbr/NIC within the Dom0 will cease to route traffic. The only way to resolve this, is to shutdown all VM's that make use of the xenbr.  At this point, traffic will resume to be routed, and the VM's can be restarted.

Pinging the OVM Server fails.

[root@myOVMServer ~]# ping x.x.x.x
PING x.x.x.x (x.x.x.x) 56(84) bytes of data.
From x.x.x.x icmp_seq=1 Destination Host Unreachable
From x.x.x.x icmp_seq=2 Destination Host Unreachable
From x.x.x.x icmp_seq=3 Destination Host Unreachable
From x.x.x.x icmp_seq=4 Destination Host Unreachable
From x.x.x.x icmp_seq=5 Destination Host Unreachable

The following messages may be present in the following logs indicating you are encountering this issue:

Messages log of guest:
Oct 19 03:52:20 vmguest kernel: connection1:0: ping timeout of 5 secs expired, recv timeout 5, last rx 4582818711, last ping 4582823711, now 4582828711
Oct 19 03:52:20 vmguest kernel: connection1:0: detected conn error (1011)
Oct 19 03:52:21 vmguest iscsid: Kernel reported iSCSI connection 1:0 error (1011) state (3)
Oct 19 03:52:59 vmguest iscsid: connect to iscsi_IP_x.x.x.x:3260 failed (No route to host)
Oct 19 03:53:35 vmguest last message repeated 6 times
Oct 19 03:54:18 vmguest last message repeated 7 times
Oct 19 03:54:21 vmguest kernel: session1: session recovery timed out after 120 secs
Oct 19 03:54:24 vmguest iscsid: connect to iscsi_IP_x.x.x.x:3260 failed (No route to host)

Messages log from OVM Server:
Oct 18 03:21:59 myOVMServer kernel: NETDEV WATCHDOG: eth11: transmit timed out
Oct 18 03:21:59 myOVMServer kernel: bnx2: eth11 NIC Copper Link is Down
.....
Oct 19 03:56:10 myOVMServer kernel: xenbr8: port 2(tap18.0) entering disabled state
Oct 19 03:56:10 myOVMServer kernel: device tap18.0 left promiscuous mode
Oct 19 03:56:10 myOVMServer kernel: type=1700 audit(1287456970.075:279): dev=tap18.0 prom=0 old_prom=256 auid=4294967295 ses=4294967295
Oct 19 03:56:10myOVMServer  kernel: xenbr8: port 2(tap18.0) entering disabled state
Oct 19 03:56:10 myOVMServer kernel: xenbr9: port 2(tap18.1) entering disabled state
Oct 19 03:56:10 myOVMServer kernel: device tap18.1 left promiscuous mode

Cause

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