thr3ads.net - Fedora xen - [Fedora-xen] Confused on how to have each guest reach a VLAN [Jun 2007]

If this information is useful, please help other people find it:
Share via:

Juan Carlos Castro y Castro

2007-Jun-25 15:45 UTC

[Fedora-xen] Confused on how to have each guest reach a VLAN

Both my host and guests are Fedora 6. My first, naive thought, was to 
just configure eth0.N within each guest OS.

For testing purposes, I created eth0.69 both within guest01 and guest02, 
with addresses 10.11.12.101 and 10.1.12.102 respectively. But guest01 
and guest02 can''t ping one another through these new addresses.

I read http://wiki.xensource.com/xenwiki/XenNetworking and, in its last 
paragraph, it suggests I have to configure VLAN in the host OS, and add 
virtual interfaces to a bridge. But I''m confused about how to do that. 
Which interfaces do I have to create? Do I have to add them to the 
xenbr0 bridge? Can I have this start automagically upon "xm create"?

Below are my ifconfig on the host machine, and the config files for the 
two guests (they have IDs 5 and 6):

----------------------------------------------------------------------
eth0      Link encap:Ethernet  HWaddr 00:15:17:23:7D:6D 
          inet addr:192.168.0.195  Bcast:192.168.0.255  Mask:255.255.255.0
          inet6 addr: fe80::215:17ff:fe23:7d6d/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:159825 errors:0 dropped:0 overruns:0 frame:0
          TX packets:62265 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:41732783 (39.7 MiB)  TX bytes:61710095 (58.8 MiB)

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:4123270 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4123270 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:377591540 (360.0 MiB)  TX bytes:377591540 (360.0 MiB)

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  MTU:1500  Metric:1
          RX packets:1552519 errors:0 dropped:0 overruns:0 frame:0
          TX packets:324298 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:100
          RX bytes:2101900272 (1.9 GiB)  TX bytes:84510344 (80.5 MiB)
          Base address:0x2000 Memory:48180000-481a0000

tap0      Link encap:Ethernet  HWaddr CA:C9:C4:AB:3E:A6 
          inet6 addr: fe80::c8c9:c4ff:feab:3ea6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:349 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1710 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:104729 (102.2 KiB)  TX bytes:928665 (906.8 KiB)

tap1      Link encap:Ethernet  HWaddr 0E:3E:CA:31:FB:7A 
          inet6 addr: fe80::c3e:caff:fe31:fb7a/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:37 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1195 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:500
          RX bytes:2922 (2.8 KiB)  TX bytes:874780 (854.2 KiB)

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 NOARP  MTU:1500  Metric:1
          RX packets:62278 errors:0 dropped:0 overruns:0 frame:0
          TX packets:159837 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:61715017 (58.8 MiB)  TX bytes:41733575 (39.8 MiB)

vif5.0    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)

vif6.0    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)

virbr0    Link encap:Ethernet  HWaddr 00:00:00:00:00:00 
          inet addr:192.168.122.1  Bcast:192.168.122.255  Mask:255.255.255.0
          inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 b)  TX bytes:6844 (6.6 KiB)

xenbr0    Link encap:Ethernet  HWaddr 0E:3E:CA:31:FB:7A 
          UP BROADCAST RUNNING NOARP  MTU:1500  Metric:1
          RX packets:97424 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:25040439 (23.8 MiB)  TX bytes:0 (0.0 b)
----------------------------------------------------------------------
name = "guest01"
uuid = "6ab45a27-0718-5dc1-d235-1704e4273870"
maxmem = 192
memory = 192
vcpus = 1
builder = "hvm"
kernel = "/usr/lib/xen/boot/hvmloader"
boot = "c"
pae = 1
acpi = 0
apic = 0
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
device_model = "/usr/lib/xen/bin/qemu-dm"
sdl = 0
vnc = 1
vncunused = 1
disk = [ "file:/var/lib/xen/images/guest01,hda,w" ]
vif = [ "mac=00:16:3e:13:61:c3,bridge=xenbr0,type=ioemu" ]
serial = "pty"
----------------------------------------------------------------------
name = "guest02"
uuid = "6ab45a27-0718-5dc1-d235-1704e4273871"
maxmem = 192
memory = 192
vcpus = 1
builder = "hvm"
kernel = "/usr/lib/xen/boot/hvmloader"
boot = "c"
pae = 1
acpi = 0
apic = 0
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
device_model = "/usr/lib/xen/bin/qemu-dm"
sdl = 0
vnc = 1
vncunused = 1
disk = [ "file:/var/lib/xen/images/guest02,hda,w" ]
vif = [ "mac=00:16:3e:13:61:c4,bridge=xenbr0,type=ioemu" ]
serial = "pty"
----------------------------------------------------------------------

Dale Bewley

2007-Jun-25 20:25 UTC

head link

Re: [Fedora-xen] Confused on how to have each guest reach a VLAN

You could create each vlan in your dom0 like this

# cat ifcfg-vlan20
DEVICE=eth0.20
BOOTPROTO=static
ONBOOT=yes
VLAN=yes
BRIDGE=xenbr20

And define a bridge for each one like this

# cat ifcfg-xenbr20
DEVICE=xenbr20
TYPE=Bridge
BOOTPROTO=static
ONBOOT=yes
IPADDR=172.19.20.253
NETMASK=255.255.255.128
NETWORK=172.19.20.128
BROADCAST=172.19.20.255

Then edit your domU config to use xenbr20 etc.* Comment out the network-bridge
script in your xend config. When you fire up the instance Xen will create the
virtual interface on the fly. The domU doesn''t know or care what
broadcast domain (VLAN) it is in. It only knows it''s subnet
information.

You might put a dhcp server on VLAN 20 above and tell all your domU''s
to use BOOTPROTO=dhcp.

*This format for the bridge name is deprecated in Fedora 7, but it works.
--
Dale Bewley - Unix Administrator - Shields Library - UC Davis
GPG: 0xB098A0F3 0D5A 9AEB 43F4 F84C 7EFD  1753 064D 2583 B098 A0F3

Fedora xen - Jun 2007 - Confused on how to have each guest reach a VLAN

[Fedora-xen] Confused on how to have each guest reach a VLAN

Re: [Fedora-xen] Confused on how to have each guest reach a VLAN