Bridging 10GbE with 12.04 - bridging works but the bridging computer has no internet access
- by Donal
I have been trying to get 12.04 bridging working with two 10GbE cards.
I have 2 10GbE cards in a linux box being used only for this bridge, 1 with 2 10GbaseT ports and another with a single CX4 port.
I have 2 client computers connected with 10GbaseT cards and the CX4 card connects to a procurve switch.
I can get the bridging happening mostly the way that I want,
The clients receive dhcp information from the dhcp server (not the bridging machine) and can connect to and properly see the rest of the network. Speeds are ok, not amazing but working on that is another matter.
My problem is that the bridging machine has no internet access ... meaning I can't update anything or apt-get anything
It can ping all other machines on the local network.
I've tried the helpful hints from: https://help.ubuntu.com/community/NetworkConnectionBridge
"Enabling Internet Use on the Bridging Computer"
and get the following
RTNETLINK answers: File exists
but dhclient br0 does nothing for me :(
I think if it is anything it a multiple route problem as both br0 and eth4 have ipaddresses ... even though I have only set it up so that br0 has one ...
Bridge setup details:
/etc/network/interface
auto br0
iface br0 inet static
address 192.168.0.246
netmask 255.255.255.0
gateway 192.168.0.1
broadcast 192.168.0.255
dns-nameservers 192.168.0.1
dns-search example.com
dns-domain example.com
#(eth2 & eth3 are the 10GbaseT)
#(eth4 is the CX4 connection)
pre-up ip link set eth2 down
pre-up ip link set eth3 down
pre-up ip link set eth4 down
pre-up brctl addbr br0
pre-up brctl addif br0 eth4 eth3 eth2
pre-up ip addr flush dev eth3
pre-up ip addr flush dev eth2
pre-up ip addr flush dev eth4
post-down ip link set eth4 down
post-down ip link set eth2 down
post-down ip link set eth3 down
post-down ip link set br0 down
post-down brctl delif br0 eth2 eth3 eth4
post-down brctl delbr br0
ifconfig -a
br0 Link encap:Ethernet HWaddr 00:15:17:22:20:34
inet addr:192.168.0.102 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::215:17ff:fe22:2034/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4957 errors:0 dropped:0 overruns:0 frame:0
TX packets:1077 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:596320 (596.3 KB) TX bytes:139952 (139.9 KB)
eth4 Link encap:Ethernet HWaddr 00:60:dd:47:7c:05
inet addr:192.168.0.57 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::260:ddff:fe47:7c05/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:9000 Metric:1
RX packets:15391 errors:0 dropped:51 overruns:0 frame:0
TX packets:1207 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5916769 (5.9 MB) TX bytes:154312 (154.3 KB)
Interrupt:70
route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 192.168.0.1 0.0.0.0 UG 0 0 0 eth4
0.0.0.0 192.168.0.1 0.0.0.0 UG 100 0 0 br0
169.254.0.0 0.0.0.0 255.255.0.0 U 1000 0 0 br0
192.168.0.0 0.0.0.0 255.255.255.0 U 0 0 0 br0
192.168.0.0 0.0.0.0 255.255.255.0 U 1 0 0 eth4
