Re: [Xen-users] Xen on Debian Etch - no dom0 network

[George Karaolides <george@xxxxxxxxxxxxxxxxxx>]

Dear RafaÅ,

Thanks for your reply and useful suggestions.

On Fri, 2008-03-21 at 12:53 +0100, RafaÅ Kupka wrote:
> Back to your problem -- run commands (while dom0 network has
> problems):
> # brctl show
> # brctl showmacs xen-br0
> # ip addr ls 

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

This is with one domU running; domU does have network access; dom0 does
not.  It is possible to connect to the domU via ssh and then connect to
the dom0 from the domU via ssh.

# brctl showmacs xenbr0
port no mac addr                is local?       ageing timer
  2     00:14:5e:ce:b5:c9       no                61.11
  2     00:14:5e:ce:bb:8f       no                89.24
  2     00:14:5e:ce:bb:ba       no                20.52
  2     00:14:5e:ce:bb:bd       no                81.96
  2     00:14:5e:ce:bb:be       no                39.58
  2     00:14:5e:ce:bb:c4       no                85.97
  2     00:19:56:e3:24:8c       no                 8.84
  2     00:1a:64:8c:77:0e       no               123.29
  2     00:1a:64:8c:78:0a       no                14.64
  1     00:1a:64:8c:be:aa       no                 0.00
  2     00:90:7f:3c:47:c3       no                 0.00
  4     02:00:00:00:00:01       no                 0.00
  1     fe:ff:ff:ff:ff:ff       yes                0.00


00:1a:64:8c:be:aa is the MAC address of the physical eth0 interface
02:00:00:00:00:01 is the MAC address I have assigned to the domU
according to the rules in
http://wiki.xensource.com/xenwiki/XenNetworking:

"In summary, an address of the following form should be OK: 

XY:XX:XX:XX:XX:XX

where X is any hexadecimal digit, and Y is one of 2, 6, A or E."

# ip addr ls
1: lo: <LOOPBACK,UP,10000> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: peth0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
    link/ether 00:1a:64:8c:be:ac brd ff:ff:ff:ff:ff:ff
4: vif0.0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever
5: eth0: <BROADCAST,MULTICAST,UP,10000> mtu 1500 qdisc noqueue
    link/ether 00:1a:64:8c:be:aa brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.1/24 brd 192.168.0.255 scope global eth0
    inet6 fe80::21a:64ff:fe8c:beaa/64 scope link
       valid_lft forever preferred_lft forever
6: vif0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
7: veth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
8: vif0.2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
9: veth2: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
10: vif0.3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
11: veth3: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:00:00:00:00:00 brd ff:ff:ff:ff:ff:ff
12: sit0: <NOARP> mtu 1480 qdisc noop
    link/sit 0.0.0.0 brd 0.0.0.0
13: xenbr0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::200:ff:fe00:0/64 scope link
       valid_lft forever preferred_lft forever
14: vif1.0: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever
15: vif1.1: <BROADCAST,NOARP,UP,10000> mtu 1500 qdisc noqueue
    link/ether fe:ff:ff:ff:ff:ff brd ff:ff:ff:ff:ff:ff
    inet6 fe80::fcff:ffff:feff:ffff/64 scope link
       valid_lft forever preferred_lft forever

I will also try your suggestion of configuring the bridge via Debian's
interfaces file and using network-dummy as the Xen networking script.

Best regards,

George Karaolides
System Administrator
OTEnet Telecommunications Ltd.
Nicosia, Cyprus


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