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[Xen-users] ARP problem with two bridges

from [Robert Long] [Permanent Link][Original]
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] ARP problem with two bridges
From: Robert Long <rlong@xxxxxxxxxxxxx>
Date: Tue, 29 May 2007 15:14:03 -0700
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Hello all,

I'm having a very weird problem with a Xen server and one of the NICs on
that server.  The eth1 interface on the server behaves normally, I can
send and receive packets normally, I get ARP requests - everything is
happy.  On eth0 however, I do not get ARP requests, or for that matter,
anything sent to a broadcast address - but I can send out ARP broadcasts
and get back replies all day long.   This happens in both the Dom0 and
well as the DomU's.    I've gone over the switch configs and both ports
are configured the same, nothing remarkably different about the vlans. 

Does anyone have any ideas?  I searched and the only thing I really
found was setting LANG="C" in the scripts, which I did but still to no
effect.  If anyone has any ideas, I would really appreciate it.  Thanks
in advance,

.r'




# brctl show
bridge name     bridge id               STP enabled     interfaces
xenbr0          8000.feffffffffff       no              vif1.0
                                                        peth0
                                                        vif0.0
xenbr1          8000.feffffffffff       no              vif1.1
                                                        peth1
                                                        vif0.1



# iptables -nL
Chain INPUT (policy ACCEPT)
target     prot opt source               destination        

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination        
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV
match --physdev-in vif1.0

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination



# ifconfig

eth0      Link encap:Ethernet  HWaddr 00:30:48:32:12:D8 
          inet addr:172.25.8.124  Bcast:172.25.8.255  Mask:255.255.255.0
          inet6 addr: fe80::230:48ff:fe32:12d8/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:8219 errors:0 dropped:0 overruns:0 frame:0
          TX packets:435 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:737171 (719.8 KiB)  TX bytes:125622 (122.6 KiB)

eth1      Link encap:Ethernet  HWaddr 00:30:48:32:12:D9 
          inet addr:172.25.254.6  Bcast:172.25.254.255  Mask:255.255.255.0
          inet6 addr: fe80::230:48ff:fe32:12d9/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:44 errors:0 dropped:0 overruns:0 frame:0
          TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:8511 (8.3 KiB)  TX bytes:804 (804.0 b)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

peth0     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:17637 errors:2 dropped:0 overruns:0 frame:1
          TX packets:3987 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1995054 (1.9 MiB)  TX bytes:929996 (908.1 KiB)
          Base address:0x2000 Memory:c8200000-c8220000

peth1     Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:940 errors:0 dropped:0 overruns:0 frame:0
          TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:69282 (67.6 KiB)  TX bytes:2692 (2.6 KiB)
          Base address:0x2020 Memory:c8220000-c8240000

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:2006 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12859 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:334649 (326.8 KiB)  TX bytes:1185100 (1.1 MiB)

vif0.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:26 errors:0 dropped:0 overruns:0 frame:0
          TX packets:65 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1524 (1.4 KiB)  TX bytes:13112 (12.8 KiB)

vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:1839 errors:0 dropped:0 overruns:0 frame:0
          TX packets:12637 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:32
          RX bytes:547173 (534.3 KiB)  TX bytes:1566406 (1.4 MiB)

vif1.1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:11 errors:0 dropped:0 overruns:0 frame:0
          TX packets:67 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:32
          RX bytes:524 (524.0 b)  TX bytes:12713 (12.4 KiB)

xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:4062 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:488706 (477.2 KiB)  TX bytes:0 (0.0 b)

xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF 
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:83 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:13024 (12.7 KiB)  TX bytes:0 (0.0 b)


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