RE: [Xen-users] 3.0.2 NAT headaches

["Roger Lucas" <roger@xxxxxxxxxxxxx>]

Hi John,

Have you applied the fix for the potential packed header corruption on Xen
DomU interfaces?

root@harpseal:~# cat /etc/network/if-up.d/fix-xen
#!/bin/bash
if [ $IFACE != "lo" ] ; then
        ethtool -K $IFACE tx off
fi

root@harpseal:~#

I have to have this script on all my DomUs to make the networking reliable.

- Roger

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-users-
> bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of John Wells
> Sent: 08 August 2006 17:48
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] 3.0.2 NAT headaches
> 
> Guys,
> 
> I'm struggling to make NAT work on Debian Sarge. Bridging works fine, but
> when I try to switch to NAT, I can't ping anything.
> 
> Here is what I have done:
> 
> Switch /etc/xen/xend-config.sxp network-script and vif-script from
> network-route and vif-route to:
> 
> (network-script network-nat)
> (vif-script vif-nat)
> 
> In my domU config:
> vif=[ 'ip=10.0.0.1' ]
> dhcp="off"
> hostname="vm01.example.com"
> ip="10.0.0.1"
> netmask="255.0.0.0"
> gateway="10.0.0.254"
> extra="3"
> 
> When I boot the domU, I set eth0 to be 10.0.0.1/8 and the default route as
> 10.0.0.254. I cannot ping out at all.
> 
> When I look at dom0 after booting the domU, I see the following
> interfaces:
> 
> eth0      Link encap:Ethernet  HWaddr 00:0E:0C:68:64:37
>           inet addr:72.232.35.21  Bcast:72.232.35.31  Mask:255.255.255.248
>           inet6 addr: fe80::20e:cff:fe68:6437/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:1708 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:2325 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:176884 (172.7 KiB)  TX bytes:200160 (195.4 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:20 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:20 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:1560 (1.5 KiB)  TX bytes:1560 (1.5 KiB)
> 
> 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 MULTICAST  MTU:1500  Metric:1
>           RX packets:26668 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:17706 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:3907182 (3.7 MiB)  TX bytes:2379910 (2.2 MiB)
> 
> 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 MULTICAST  MTU:1500  Metric:1
>           RX packets:5218 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:6337 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:632298 (617.4 KiB)  TX bytes:585057 (571.3 KiB)
> 
> vif7.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet addr:10.0.0.128  Bcast:0.0.0.0  Mask:255.255.255.255
>           inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:1496 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:191 errors:0 dropped:6 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:85219 (83.2 KiB)  TX bytes:8022 (7.8 KiB)
> 
> xenbr0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
>           inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:259 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:0
>           RX bytes:66206 (64.6 KiB)  TX bytes:468 (468.0 b)
> 
> Can anyone tell me what I'm missing/doing wrong? I really appreciate any
> help you may provide.
> 
> Thanks!
> 
> John
> 
> 
> 
> 
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