Re: [Xen-users] Bridged networking example

[Sven <svoop@xxxxxxxxxxx>]

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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