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xen-users
Re: [Xen-users] Networking issue on DomU
Hi,
On Friday 08 July 2005 13:25, Nico wrote:
> Hello lists.
>
> Having a problem getting network to work inside a domU.
>
> I have 2 guests os's (the example ttylinux and a CentOS 3,3 domU).
>
> the 2 domU's can ping each other, the dom0 can ping the outside world, incl
> internet.
> The 2 domU's can not ping the dom0 (or anything else) and the dom0 can not
> ping the domU's.
>
> Config dom0
> Host OS is CentOS 4.0 with xen 2.0.6
>
> [root@vps xen]# ifconfig
> eth0 Link encap:Ethernet HWaddr 00:60:08:6D:1E:C6
> inet addr:10.0.0.211 Bcast:10.0.0.255 Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:125239 errors:0 dropped:0 overruns:0 frame:0
> TX packets:1677 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:17073332 (16.2 MiB) TX bytes:132617 (129.5 KiB)
> Interrupt:10 Base address:0x1480
>
> eth1 Link encap:Ethernet HWaddr 00:04:76:13:92:DA
> inet addr:10.0.0.210 Bcast:10.0.0.255 Mask:255.255.255.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:113302 errors:0 dropped:0 overruns:1 frame:0
> TX packets:39535 errors:0 dropped:0 overruns:0 carrier:0
> collisions:22 txqueuelen:1000
> RX bytes:14854554 (14.1 MiB) TX bytes:4235423 (4.0 MiB)
> Interrupt:9 Base address:0x1400
>
> lo Link encap:Local Loopback
> inet addr:127.0.0.1 Mask:255.0.0.0
> UP LOOPBACK RUNNING MTU:16436 Metric:1
> RX packets:42137 errors:0 dropped:0 overruns:0 frame:0
> TX packets:42137 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:3030632 (2.8 MiB) TX bytes:3030632 (2.8 MiB)
>
> vif30.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:34 errors:0 dropped:0 overruns:0 frame:0
> TX packets:90 errors:0 dropped:145 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:2378 (2.3 KiB) TX bytes:4540 (4.4 KiB)
>
> vif51.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:20 errors:0 dropped:0 overruns:0 frame:0
> TX packets:7 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:1120 (1.0 KiB) TX bytes:462 (462.0 b)
>
> xen-br0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
> inet addr:10.0.0.212 Bcast:10.255.255.255 Mask:255.0.0.0
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:335 errors:0 dropped:0 overruns:0 frame:0
> TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:0
> RX bytes:15764 (15.3 KiB) TX bytes:756 (756.0 b)
Looks like your bridge isn't setup correctly.
at least one of your real network ifaces (eth0 or eth1) should be running
without IP Address, be enslaved to xen-br0, and xen-br0 should have the IP it
had earlier.
the bridge should then use the HW/MAC Addr of that nic.
check "brctl show xen-br0"
If you don't want to bridge your network directly, but route instead, you'd
have to setup a MAC Addr for that bridge, give it an IP from a different
subnet, enable routing, and enable IP-Forwarding.
Hope that pointed you in the right direction,
/Ernst
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