Re: [Xen-users] Network Failure after Installation

[Kun Cheng <chengkunck@xxxxxxxxx>]

I've seen you added eth0 to xenbr0. But 'brctl show ' displays that it bridged no NIC?! Can ur xenr0 get an valid address after restarting both the bridge and the network service?

Check the route table, make sure u can ping an outside address in the host.

Maybe u should also enable ipv4 forwarding.Â

CheckÂhttp://wiki.xen.org/wiki/Network_Configuration_Examples_(Xen_4.1%2B) for more examples.

On Mon, Nov 2, 2015 at 8:50 AM Ray <ray@xxxxxxxxx> wrote:

> It looks like I did not finish the bridge setup. So I:
> brctl addbr br0
>
> I clicked on the browser icon and the Internet came up. Rebooting, it still comes up.
>
> The wifi is not working yet. So I will proceed to complete the bridge setup.


I would like to recover networking, again.

I broke the connection, again. While the previous message stated I added the bridge, that is all I did. I did not follow the remaining steps. After completing those steps, the Internet was no longer reachable.


Here is the configuration info:


# brctl show
bridge name  Âbridge id            STP enabled  Âinterfaces
xenbr0Â Â Â Â Â Â Â 8000.000000000000Â Â Â no


# ifconfig
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:65536 Metric:1
     RX packets:225 errors:0 dropped:0 overruns:0 frame:0
     TX packets:225 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:0
     RX bytes:20133 (19.6 KiB) TX bytes:20133 (19.6 KiB)

usb0   Link encap:Ethernet HWaddr 00:50:b6:c4:3d:42
     inet addr:192.168.1.8 Bcast:192.168.1.255 Mask:255.255.255.0
     inet6 addr: fe80::250:b6ff:fec4:3d42/64 Scope:Link
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:321 errors:0 dropped:0 overruns:0 frame:0
     TX packets:76 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:1000
     RX bytes:56873 (55.5 KiB) TX bytes:10452 (10.2 KiB)

wlan0  ÂLink encap:Ethernet HWaddr 94:65:9c:38:bf:30
     UP 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:1000
     RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

xenbr0  Link encap:Ethernet HWaddr c2:25:60:8b:9a:b3
     inet6 addr: fe80::c025:60ff:fe8b:9ab3/64 Scope:Link
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
     RX packets:0 errors:0 dropped:0 overruns:0 frame:0
     TX packets:419 errors:0 dropped:0 overruns:0 carrier:0
     collisions:0 txqueuelen:0
     RX bytes:0 (0.0 B) TX bytes:26732 (26.1 KiB)

xenbr0:avahi Link encap:Ethernet HWaddr c2:25:60:8b:9a:b3
     inet addr:169.254.9.110 Bcast:169.254.255.255 Mask:255.255.0.0
     UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1


Here is /etc/networks

# cat interfaces


# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

source /etc/network/interfaces.d/*

# The loopback network interface
auto lo
iface lo inet loopback

# Ethernet interface setup
auto eth0
#allow-hotplug eth0
#iface eth0 inet dhcp

# Ethernet interface setup 'manual'
iface eth0 inet manual
#Â Â Â pre-up ifconfig $IFACE up
#Â Â Â post-down ifconfig $IFACE down
auto xenbr0
iface xenbr0 inet dhcp
bridge_ports eth0


Note, the third line of this file begins with 'source' for interfaces.d, but this directory has not content.


I don't know what to look for at this point.

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--

Thanks,
Cheng Kun

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