Marc Patino Gómez
2008-Aug-13 11:47 UTC
[Xen-users] Xen bridge network issue with bonding interfaces
Hi folks,
My Xen server has two networks, one public and other private. In the
private network, I have some servers with bonded interfaces. I have a
big problem with these ones because Xen guest lose conectivity with
these servers. In my opinion this issue is due to an arp problem
My config:
Xen server with two NICs (one private and one public) and without
bonded interfaces, and bridged networking :
suxen:~ # brctl show
bridge name bridge id STP enabled interfaces
xenbr0 8000.feffffffffff no vif0.0
peth0
vif2.0
xenbr1 8000.feffffffffff no vif0.1
peth1
vif2.1
suxen:~ # brctl showmacs xenbr1
port no mac addr is local? ageing timer
2 00:15:17:71:52:0d no 32.15
2 00:15:17:71:52:65 no 23.06
2 00:15:17:76:c2:8c no 39.10
3 00:16:3e:03:0a:17 no 0.23
2 00:1c:2e:bc:a5:00 no 30.13
2 00:1c:2e:bc:a5:3b no 24.65
2 00:1e:c9:d6:41:7c no 0.23
2 00:1e:c9:d6:41:88 no 37.06
2 00:1f:28:c9:18:c0 no 33.70
1 fe:ff:ff:ff:ff:ff yes 0.00
Xen guest (suxmon) with conectivity problems to bonded linux servers:
suxmon:~ # arp
Address HWtype HWaddress Flags
Mask Iface
192.168.100.63
(incomplete) eth1
172.17.90.254 ether 00:00:5E:00:01:01
C eth0
192.168.100.51
(incomplete) eth1
192.168.100.52
(incomplete) eth1
192.168.100.54 ether 00:1E:C9:D6:41:7C
C eth1
So, in xenbridge xenbr1 I can see all mac of bonded servers ( I am
using active-backup mode), but in the xen guest I lose conectivity with
these servers. In syslog of xen guest I can see a strange message :
eth1: duplicate address detected!
it is strange because I have harcoded xen guest mac address in xenguest
config file, and I cant see this mac address duplicate in my private
network.
Any help will be welcome
Regards,
Marc
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