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xen-users
[Xen-users] Re: DomU network configuration problem
Tej <bewith.tej <at> gmail.com> writes:
> > ---------------8<------------------
> >>
> >> You can do following steps:
> >>
> >> 1. Assign any private IP to your DomU
> >> 2. Assign the subnet gateway to the domU, above vuf configuration is
> >> fine i guess.
> >>
> >> 3. Now as dom0 is on different subnet, create the eth0 (i assume here
> >> that eth0 domU and eth0 of dom0 is connected to xenbr0 ) alias as a
> >> gateway for domU.
> >> In dom0:
> >> ifconfig eth0 add domU-gateway netmask.
> >> 4. Now that gateway should be pingable
> >> 5. Now add the forwarding rules
> >> echo 1 >/procsys/net/ipv4/ip_forward
> >> Now you should be able to ping the eth0 on dom0.
> >> 6. Add the masq rule as above.
> >> iptables -t nat -A POSTROUTING -j MASQUERADE (use the eth0 address)
> >> 7. Now you should be able to ping google.com
> >>
> >> HTH
> >>
> >> -tej
> > -------------------8<--------------
> >
> > i tried these instructions but i could not proceed till step 4.
> > i was not able to ping the gateway from domU.
>
> only one reason i could see xenbridge is not connecting dom0 and domU
>
> ensure this connectivity using brctl show:
>
> xenbr0 8000.xxxxx no vif0.0
> peth0
> vif<domU-id>.0
> if not eth0.0 will not be pingable.
>
> try this if still problem post following
> 1. domU ifconfig & route -n
ifconfig on domU gives the following output:
xentestl: # ifconfig
eth8 Link encap:Ethernet HWaddr 00:16:3E:5D:1F:3D
inet addr: 192.168.1.12 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80: :216:3eff:fe5d:lf3d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 ouerruns:0 frane:0
TX packets:8 errors:0 dropped:0 ouerruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 b) TX bytes:592 (592.0 b)
Interrupt : 177 Base address :0x2000
lo Link encap:Local Loopback
inet addr: 127.0.0.1 Mask:255.0.O .0
inet6 addr: ::1/128 Scope:Host
UP LO0PBACX RUNNING MTU:16436 Metric:1
RX packets:50 errors:0 dropped:0 ouerruns:0 frame:0
TX packets:50 errors:0 dropped:0 ouerruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:7943 (7.7 Kb) TX bytes:7943 (7.7 Kb)
route -n on domU shows the following result:
Destination Gateway Genmask Flags Metric Ref Use Iface
192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth8
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth8
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
> 2. dom0 ifconfig & route -n
dom0 ifconfig has the following result :
dummy0 Link encap:Ethernet HWaddr 52:B0:12:64:EA:DD
inet addr:10.33.195.40 Bcast:10.33.195.255 Mask:255.255.255.0
inet6 addr: fe80::50b0:12ff:fe64:eadd/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 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:0 (0.0 b) TX bytes:468 (468.0 b)
eth0 Link encap:Ethernet HWaddr 00:19:DB:51:BB:4A
inet addr:10.33.196.47 Bcast:10.33.196.255 Mask:255.255.255.0
inet6 addr: fe80::219:dbff:fe51:bb4a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:101210 errors:0 dropped:0 overruns:0 frame:0
TX packets:116297 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:7828179 (7.4 Mb) TX bytes:160785457 (153.3 Mb)
Base address:0x3000 Memory:b8340000-b8360000
eth0:0 Link encap:Ethernet HWaddr 00:19:DB:51:BB:4A
inet addr:192.168.1.255 Bcast:10.33.196.255 Mask:255.255.255.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
Base address:0x3000 Memory:b8340000-b8360000
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:58768 errors:0 dropped:0 overruns:0 frame:0
TX packets:58768 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:305180714 (291.0 Mb) TX bytes:305180714 (291.0 Mb)
tap0 Link encap:Ethernet HWaddr 9E:A2:FE:02:92:1D
inet6 addr: fe80::9ca2:feff:fe02:921d/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:500
RX bytes:592 (592.0 b) TX bytes:468 (468.0 b)
vif10.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF
UP BROADCAST NOARP 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:32
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
xenbr0 Link encap:Ethernet HWaddr 9E:A2:FE:02:92:1D
inet6 addr: fe80::f01a:3ff:fe74:43db/64 Scope:Link
UP BROADCAST RUNNING NOARP MTU:1500 Metric:1
RX packets:38 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:2304 (2.2 Kb) TX bytes:0 (0.0 b)
route -n on dom0 is:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
10.33.195.0 0.0.0.0 255.255.255.0 U 0 0 0 dummy0
10.33.196.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U 0 0 0 lo
0.0.0.0 10.33.196.35 0.0.0.0 UG 0 0 0 eth0
> 3. brctl show
brctl on dom0 gives the following output:
xenbr0 8000.9ea2fe02921d no vif0.0
pdummy0
tap0
vif10.0
>
> -tej
>
> >
> > is there any method to know that the eth0 of domU is connected to xenbr0
> >
> > one more information that i missed out last time was that i am using full
> > virtualization. so i just want to confirm that are the above steps fine
> > for full virtualization as well?
> >
> >
> >
> >
> >> > _______________________________________________
> >> > Xen-users mailing list
> >> > Xen-users <at> lists.xensource.com
> >> > http://lists.xensource.com/xen-users
> >> >
> >>
> >
> >
> >
> >
> >
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users <at> lists.xensource.com
> > http://lists.xensource.com/xen-users
> >
>
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