Olivier Blanc
2009-Jun-03 07:13 UTC
[Xen-devel] Migration : network latency due to ARP Reply not generated
Hi,
I really need help, as I am stuck !
I am working with Xen 3.3.1 on OpenSuse 11 with 2.6.24 kernel
My network is bridged over vlan.
When I migrate a DOMU (fedora core), the ARP REPLY Non Sollicited is not
generated so I have a long network latency before my DOMU becomes
reachable.
What am i doing wrong so that Xen does not generate the ARP ?
Here is my bridge configuration (stp is off) :
admin
bridge id 8000.001a6452105c
designated root 8000.001a6452105c
root port 0 path cost 0
max age 20.00 bridge max age 20.00
hello time 2.00 bridge hello time 2.00
forward delay 0.00 bridge forward delay 0.00
ageing time 300.01
hello timer 0.49 tcn timer 0.00
topology change timer 0.00 gc timer 0.49
flags
eth0.2 (1)
port id 8001 state forwarding
designated root 8000.001a6452105c path cost 100
designated bridge 8000.001a6452105c message age timer 0.00
designated port 8001 forward delay timer 0.00
designated cost 0 hold timer 0.00
flags
tap18.0 (2)
port id 8002 state forwarding
designated root 8000.001a6452105c path cost 100
designated bridge 8000.001a6452105c message age timer 0.00
designated port 8002 forward delay timer 0.00
designated cost 0 hold timer 0.00
flags
vif18.0 (3)
port id 8003 state forwarding
designated root 8000.001a6452105c path cost 100
designated bridge 8000.001a6452105c message age timer 0.00
designated port 8003 forward delay timer 0.00
designated cost 0 hold timer 0.00
flags
Here are the configuration of my ETH0 interface and vlan interface
sv1:~ # ifconfig eth0
eth0 Link encap:Ethernet HWaddr 00:1A:64:52:10:5C
inet adr:172.1.0.1 Bcast:172.1.0.255 Masque:255.255.255.0
adr inet6: fe80::21a:64ff:fe52:105c/64 Scope:Lien
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1807086 errors:0 dropped:680 overruns:0 frame:0
TX packets:2458143 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:1000
RX bytes:1808257592 (1724.4 Mb) TX bytes:2957025946 (2820.0
Mb)
Interruption:24
sv1:~ # ifconfig eth0.2
eth0.2 Link encap:Ethernet HWaddr 00:1A:64:52:10:5C
adr inet6: fe80::21a:64ff:fe52:105c/64 Scope:Lien
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:10 errors:0 dropped:0 overruns:0 frame:0
TX packets:84 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 lg file transmission:0
RX bytes:600 (600.0 b) TX bytes:4828 (4.7 Kb)
BTW, xm vnet-list never return real information of bridges is that
normal ?
sv1:~ # xm vnet-list -l
"{''Status'': ''Failure'',
''ErrorDescription'':
[''MESSAGE_METHOD_UNKNOWN'',
''xend_vnet'']}"
"{''Status'': ''Failure'',
''ErrorDescription'':
[''MESSAGE_METHOD_UNKNOWN'',
''xend_vnet'']}"
Thanks for help
Olivier
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