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RE: [Xen-users] SSH ping etc not working between dom0 and domU's



> -----Original Message-----
> From: Ilari Mäkelä [mailto:ilari@xxxxxx]
> Sent: woensdag 28 mei 2008 17:21
> To: Jeroen Torrekens
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] SSH ping etc not working between dom0 and
domU's
>
> Jeroen Torrekens wrote:
> > Ilari Mäkelä wrote:
> >> Jeroen Torrekens wrote:
> >>> Hi,
> >>>
> >>> I think you might want to check this:
> >>>
> >>> Here is ifconfig from dom0:
> >>>
> >>> eth0      Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
> >>>         inet addr:192.168.1.5  Bcast:192.168.1.255
Mask:255.255.255.0
> >>>         inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
> >>>         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >>>         RX packets:3422 errors:0 dropped:0 overruns:0 frame:0
> >>>         TX packets:2133 errors:0 dropped:0 overruns:0 carrier:0
> >>>         collisions:0 txqueuelen:1000
> >>>         RX bytes:347388 (339.2 KiB)  TX bytes:417210 (407.4 KiB)
> >>>         Interrupt:16 Base address:0x6000
> >>>
> >>> Especially the hardware address.
> >>>
> >>> Jeroen
> >> Hi,
> >>
> >> Thanks for the reply. That is the hardware address that was setup
> >> when I installed Debian. If I try to change that hardware address  in
> >> /etc/network/interface config file I can't ssh to my dom0 machine
> >> anymore from other computers in my network. I know it looks weird but
> >> if I change it my network on eth0 dies. Now I changed my
> >> configuration a bit and it looks like this now:
> >>
> >> This is my network script at the moment, found this one from this
list:
> >>
> >> #!/bin/sh
> >>
> >> brctl addbr xenbr0
> >> brctl setfd xenbr0 0
> >> brctl sethello xenbr0 0
> >> brctl stp xenbr0 off
> >> ifconfig eth2 0.0.0.0 down
> >> ifconfig eth2 0.0.0.0 up
> >> brctl addif xenbr0 eth2
> >> ifconfig xenbr0 10.0.0.1 netmask 255.255.255.0
> >>
> >> sleep 5
> >>
> >> brctl addbr xenbr1
> >> brctl setfd xenbr1 0
> >> brctl sethello xenbr1 0
> >> brctl stp xenbr1 off
> >> ifconfig eth3 0.0.0.0 down
> >> ifconfig eth3 0.0.0.0 up
> >> brctl addif xenbr1 eth3
> >> ifconfig xenbr1 10.0.1.2 netmask 255.255.255.0
> >>
> >> sleep 5
> >>
> >> ifconfig eth2 0.0.0.0
> >> ifconfig eth3 0.0.0.0
> >> exit 0
> >>
> >>
> >> ifconfig on dom0:
> >>
> >> eth0      Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
> >>          inet addr:192.168.1.5  Bcast:192.168.1.255
Mask:255.255.255.0
> >>          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
> >>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >>          RX packets:296 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:267 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:1000
> >>          RX bytes:29514 (28.8 KiB)  TX bytes:33556 (32.7 KiB)
> >>          Interrupt:16 Base address:0x6000
> >>
> >>
> >> eth2      Link encap:Ethernet  HWaddr 00:1C:F0:5B:69:F8
> >>          inet6 addr: fe80::21c:f0ff:fe5b:69f8/64 Scope:Link
> >>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >>          RX packets:90 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:14 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:1000
> >>          RX bytes:7356 (7.1 KiB)  TX bytes:1056 (1.0 KiB)
> >>          Interrupt:22 Base address:0xe000
> >>
> >> eth3      Link encap:Ethernet  HWaddr 00:1C:F0:5A:5D:72
> >>          inet6 addr: fe80::21c:f0ff:fe5a:5d72/64 Scope:Link
> >>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >>          RX packets:253 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:159 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:1000
> >>          RX bytes:22429 (21.9 KiB)  TX bytes:17327 (16.9 KiB)
> >>          Interrupt:17
> >>
> >> 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:26 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:26 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:0
> >>          RX bytes:2360 (2.3 KiB)  TX bytes:2360 (2.3 KiB)
> >>
> >> vif1.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
> >>          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
> >>          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
> >>          RX packets:9 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:74 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:0
> >>          RX bytes:252 (252.0 b)  TX bytes:6114 (5.9 KiB)
> >>
> >> vif2.0    Link encap:Ethernet  HWaddr FE:FF:FF:FF:FF:FF
> >>          inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link
> >>          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
> >>          RX packets:174 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:242 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:0
> >>          RX bytes:14867 (14.5 KiB)  TX bytes:21373 (20.8 KiB)
> >>
> >> xenbr0    Link encap:Ethernet  HWaddr 00:1C:F0:5B:69:F8
> >>          inet addr:10.0.0.1  Bcast:10.0.0.255  Mask:255.255.255.0
> >>          inet6 addr: fe80::21c:f0ff:fe5b:69f8/64 Scope:Link
> >>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >>          RX packets:99 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:0
> >>          RX bytes:6348 (6.1 KiB)  TX bytes:552 (552.0 b)
> >>
> >> xenbr1    Link encap:Ethernet  HWaddr 00:1C:F0:5A:5D:72
> >>          inet addr:10.0.1.2  Bcast:10.0.1.255  Mask:255.255.255.0
> >>          inet6 addr: fe80::21c:f0ff:fe5a:5d72/64 Scope:Link
> >>          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
> >>          RX packets:111 errors:0 dropped:0 overruns:0 frame:0
> >>          TX packets:9 errors:0 dropped:0 overruns:0 carrier:0
> >>          collisions:0 txqueuelen:0
> >>          RX bytes:6642 (6.4 KiB)  TX bytes:594 (594.0 b)
> >>
> >> and kernel routing table on dom0:
> >>
> >> Kernel IP routing table
> >> Destination     Gateway         Genmask         Flags   MSS Window
> >> irtt Iface
> >> 10.0.0.0        0.0.0.0         255.255.255.0   U         0
> >> 0          0 xenbr0
> >> 10.0.1.0        0.0.0.0         255.255.255.0   U         0
> >> 0          0 xenbr1
> >> 192.168.1.0     0.0.0.0         255.255.255.0   U         0
> >> 0          0 eth0
> >> 0.0.0.0         192.168.1.1     0.0.0.0         UG        0
> >> 0          0 eth0
> >>
> >> Now I can ping my dom0 from domU's but everything else is still
> >> failing. Can't ping my domU's from dom0 and ssh doesn't work at all.
> >> So there is little progress because ping wasn't working at all before
> >> and now it works from domU to dom0.
> >>
> >> Ilari Mäkelä
> > Could you provide me with the output of 'brctl show' ?
> > Thanks!
> Hi,
>
> This is a bit strange. I changed my hardware address in
> /etc/network/interfaces file and booted my computer. Now I can access my
> dom0 from my domU with ssh but now I can't access my dom0 from other
> computers in my network like I used to before changing that hardware
> address. But here is the output you asked:
>
> bridge name     bridge id               STP enabled     interfaces
> xenbr0          8000.001cf05b69f8       no              eth2
>                                                         vif1.0
> xenbr1          8000.001cf05a5d72       no              eth3
>                                                         vif2.0
>
>
> Ilari Mäkelä

Why do you change the MAC address of you eth0? And what is the value now?

Just leave it. It is called Hardware Address for a reason; just let it
have its original value.



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