Re: [Xen-users] Bridged networking example

[Jan Hejl <jh@xxxxxxxxxx>]

Hello Sven,

i've encountered same problem few moths ago with Gentoo Live CD. After 
"xl create domU.config" i saw vif1.0 and tap1.0 on Dom0, but then when 
Live CD boot up, tap1.0 device dissapeared. It was something with ACPI.
I've got this in DomU config:

acpi=1
apic=0

and DomU networking works.

I didn't figered out what was the problem but this may help you.

Jan

On 12/20/2012 07:09 PM, Sven wrote:
> Hi
>
> I've altered my configs as per James' examples. The bridge on Dom0 works fine
> and with "xl create dom1" creates the vif, no errors at all. I can log on with
> "xl console dom1" and see eth0 came up alright and configured. Still no
> networking in Dom1:
>
> | ~# telnet 74.125.230.196 80   # google.com
> | Trying 74.125.230.196...
> | telnet: Unable to connect to remote host: No route to host
>
> After googling and trying things for a few hours, I still haven't figured out
> how come. :-/
>
> I'm only doing IPv4 for now since I have individual IPv4 for all Doms. No
> iptables on any Dom at this point.
>
> Since no problems are displayed or logged, I have no clue how to further debug
> this and help is very welcome!
>
> Thanks a lot,  -sven
>
>
> Dom0
> ----
>
> # ifconfig -a
> | eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
> |         inet6 ****::****:****:****:****  prefixlen 64  scopeid 0x20<link>
> |         ether **:**:**:**:**:e1  txqueuelen 1000  (Ethernet)
> |         RX packets 1286  bytes 117136 (114.3 KiB)
> |         RX errors 0  dropped 0  overruns 0  frame 0
> |         TX packets 965  bytes 309882 (302.6 KiB)
> |         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> | vif1.0: flags=4098<BROADCAST,MULTICAST>  mtu 1500
> |         ether fe:ff:ff:ff:ff:ff  txqueuelen 32  (Ethernet)
> |         RX packets 0  bytes 0 (0.0 B)
> |         RX errors 0  dropped 0  overruns 0  frame 0
> |         TX packets 0  bytes 0 (0.0 B)
> |         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> | xenbr0: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST>  mtu 1500
> |         inet **.**.97.72  netmask 255.255.255.224  broadcast **.**.97.95
> |         inet6 ****::****:****:****:****  prefixlen 64  scopeid 0x20<link>
> |         ether <<same as eth0>>  txqueuelen 0  (Ethernet)
> |         RX packets 1286  bytes 99112 (96.7 KiB)
> |         RX errors 0  dropped 0  overruns 0  frame 0
> |         TX packets 959  bytes 309414 (302.1 KiB)
> |         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
>
> # route -n
> | Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> | 0.0.0.0         **.**.97.65     0.0.0.0         UG    4      0        0 xenbr0
> | **.**.97.64     0.0.0.0         255.255.255.224 U     0      0        0 xenbr0
> | 127.0.0.0       127.0.0.1       255.0.0.0       UG    0      0        0 lo
>
> # brctl show
> | bridge name   bridge id               STP enabled     interfaces
> | xenbr0        8000.**********e1       no              eth0
>
> # cat /etc/sysctl.conf
> | net.ipv4.ip_forward = 1
>
>
> Dom1
> ----
>
> # ifconfig
> | eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
> |         inet **.**.97.66  netmask 255.255.255.224  broadcast **.**.97.95
> |         inet6 ****::***:****:****:****  prefixlen 64  scopeid 0x20<link>
> |         ether **:**:**:**:**:08  txqueuelen 1000  (Ethernet)
> |         RX packets 0  bytes 0 (0.0 B)
> |         RX errors 0  dropped 0  overruns 0  frame 0
> |         TX packets 30  bytes 1476 (1.4 KiB)
> |         TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
> |         device interrupt 25
>
> # route -n
> | Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
> | 0.0.0.0         **.**.97.65     0.0.0.0         UG    2      0        0 eth0
> | **.**.97.64     0.0.0.0         255.255.255.224 U     0      0        0 eth0
> | 127.0.0.0       127.0.0.1       255.0.0.0       UG    0      0        0 lo
>
> # console (network related stuff)
> | [    0.000000] Xen version: 4.1.1 (preserve-AD)
> | [    0.000000] Kernel command line: root=/dev/xvda1 console=hvc0
> root=/dev/xvda1 ro 3
> | [    0.012011] NET: Registered protocol family 16
> | [    0.016136] PCI: System does not support PCI
> | [    0.016237] NetLabel: Initializing
> | [    0.016240] NetLabel:  domain hash size = 128
> | [    0.016242] NetLabel:  protocols = UNLABELED CIPSOv4
> | [    0.016248] NetLabel:  unlabeled traffic allowed by default
> | [    0.017472] NET: Registered protocol family 2
> | [    0.017828] IP route cache hash table entries: 262144 (order: 9, 2097152
> bytes)
> | [    0.019279] TCP established hash table entries: 524288 (order: 11, 8388608
> bytes)
> | [    0.020341] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
> | [    0.020456] TCP: Hash tables configured (established 524288 bind 65536)
> | [    0.020459] TCP: reno registered
> | [    0.020484] UDP hash table entries: 4096 (order: 5, 131072 bytes)
> | [    0.020523] UDP-Lite hash table entries: 4096 (order: 5, 131072 bytes)
> | [    0.020583] NET: Registered protocol family 1
> | [    0.020616] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
> | [    0.025036] brd: module loaded
> | [    0.025541] loop: module loaded
> | [    0.044880] Initialising Xen virtual ethernet driver.
> | [    0.261392] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
> | [    0.261559] ip_tables: (C) 2000-2006 Netfilter Core Team
> | [    0.261569] TCP: cubic registered
> | [    0.261691] NET: Registered protocol family 10
> | [    0.261827] ip6_tables: (C) 2000-2006 Netfilter Core Team
> | [    0.261841] sit: IPv6 over IPv4 tunneling driver
> | [    0.261951] NET: Registered protocol family 17
> | [    0.261964] Bridge firewalling registered
>
>
>
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