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[Xen-users] Multiple IPs in a domU

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Multiple IPs in a domU
From: Dan Parsons <dparsons@xxxxxxxx>
Date: Sun, 25 Feb 2007 21:54:51 -0800
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I've been trying to make multiple public IP addresses work in a domU, and have been unable to do it. I've tried every method mentioned in the xenu-users archive as well as through a lot of stuff mentioned in google.

I've tried using eth0:1, etc, and also eth0, eth1 with multiple vif's in the domU config file.

Basically, the IP assigned to eth0 always works right away, from the outside world, but the ip assigned to eth1 does not work until I force eth1 to make an outgoing connection. Then the IP works. So, it's a MAC/ARP issue.

But why isn't the MAC for eth1 being announced? I've tried specifying the IPs in the domU config various ways and that also didn't help.

This is on Fedora Core 6, using Xen 3.0.3. domU is also FC6 using the same kernel. kernel is 2.6.19-1.2911.fc6xen. Below is a bunch more info, please tell me if I've forgotten to include anything.

domU config file:

name = "gadgeteer"
memory = "512"
disk = [ 'phy:vg0/VM_gadgeteer,xvda1,w','phy:vg0/ VM_gadgeteer_swap,xvdb1,w' ] vif = [ 'bridge=xenbr1, mac=00:16:3E:6A:24:16', 'bridge=xenbr1, mac=00:16:3E:19:F3:01' ]

nographic=1
uuid = "8541a049-0168-2bae-9d8d-b47172f520ad"
bootloader="/usr/bin/pygrub"
vcpus=1
on_reboot   = 'restart'
on_crash    = 'restart'


ifconfig -a on dom0:



eth0      Link encap:Ethernet  HWaddr 00:30:48:32:53:44
          inet addr:*SENSORED*  Bcast:XXXXXXXXXX  Mask:255.255.255.192
          inet6 addr: fe80::230:48ff:fe32:5344/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:448 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1738 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:134781 (131.6 KiB)  TX bytes:125574 (122.6 KiB)
          Base address:0x2000 Memory:c8200000-c8220000

eth1      Link encap:Ethernet  HWaddr 00:30:48:32:53:45
inet addr:*SENSORED* Bcast:XXXXXXXXXXXX Mask: 255.255.255.248
          inet6 addr: fe80::230:48ff:fe32:5345/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3741 errors:0 dropped:0 overruns:0 frame:0
          TX packets:2007 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:324481 (316.8 KiB)  TX bytes:387326 (378.2 KiB)

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:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)

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:58430 errors:0 dropped:0 overruns:0 frame:0
          TX packets:42600 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:7298901 (6.9 MiB)  TX bytes:6151916 (5.8 MiB)
          Base address:0x2020 Memory:c8220000-c8240000

sit0      Link encap:IPv6-in-IPv4
          NOARP  MTU:1480  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)

veth0     Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          BROADCAST MULTICAST  MTU:1500  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)

veth2     Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          BROADCAST MULTICAST  MTU:1500  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

veth3     Link encap:Ethernet  HWaddr 00:00:00:00:00:00
          BROADCAST MULTICAST  MTU:1500  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)

vif0.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          BROADCAST MULTICAST  MTU:1500  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)

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:29682 errors:0 dropped:0 overruns:0 frame:0
          TX packets:47312 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4244090 (4.0 MiB)  TX bytes:4865658 (4.6 MiB)

vif0.2    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          BROADCAST MULTICAST  MTU:1500  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)

vif0.3    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          BROADCAST MULTICAST  MTU:1500  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)

vif18.0   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:314 errors:0 dropped:0 overruns:0 frame:0
          TX packets:473 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:32407 (31.6 KiB)  TX bytes:36039 (35.1 KiB)

vif18.1   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:689 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:524 (524.0 b)  TX bytes:64868 (63.3 KiB)

vif19.0   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:73 errors:0 dropped:0 overruns:0 frame:0
          TX packets:97 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:5423 (5.2 KiB)  TX bytes:8461 (8.2 KiB)

vif19.1   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:75 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:524 (524.0 b)  TX bytes:6322 (6.1 KiB)

xenbr1    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:1563 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:84662 (82.6 KiB)  TX bytes:0 (0.0 b)

brctl show output:

bridge name     bridge id               STP enabled     interfaces
xenbr1          8000.feffffffffff       no              vif19.1
                                                        vif19.0
                                                        vif18.1
                                                        vif18.0
                                                        peth1
                                                        vif0.1

ifconfig -a on domU:

eth0      Link encap:Ethernet  HWaddr 00:16:3E:5A:B3:AA
inet addr:*SENSORED public IP1* Bcast:XXXXXXXXXX Mask: 255.255.255.0
          inet6 addr: fe80::216:3eff:fe5a:b3aa/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:101 errors:0 dropped:0 overruns:0 frame:0
          TX packets:73 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:8761 (8.5 KiB)  TX bytes:6445 (6.2 KiB)

eth1      Link encap:Ethernet  HWaddr 00:16:3E:25:72:BA
inet addr:*SENSORED public IP2* Bcast:XXXXXXXXXXX Mask: 255.255.255.0
          inet6 addr: fe80::216:3eff:fe25:72ba/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:79 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6622 (6.4 KiB)  TX bytes:678 (678.0 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:8 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:560 (560.0 b)  TX bytes:560 (560.0 b)



Dan Parsons



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