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June 21, 2016 14:37
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Install and config of ethernet bridge on Raspberry Pi
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| #!/usr/bin/env bash | |
| # Set up transparent bridge eth1->eth0 | |
| # - eth0 (built-in): attach to TT DSL router | |
| # - eth1 (UBS) : attach to internal switch | |
| # | |
| # This should be executed at system startup. | |
| # On Raspberry PI debian add this line to: | |
| # /etc/rc.local: | |
| # bash /path_to_this_file | |
| # this requires the following: | |
| # apt-get install bridge-utils | |
| echo "$0: setting eth0-eth1 bridge" | |
| ## shutdown everything first | |
| ifconfig eth0 down | |
| ifconfig eth1 down | |
| ## set interfaces to promiscuous mode | |
| ifconfig eth0 0.0.0.0 promisc up | |
| ifconfig eth1 0.0.0.0 promisc up | |
| ## add both interfaces to the virtual bridge network | |
| brctl addbr br0 | |
| brctl addif br0 eth0 | |
| brctl addif br0 eth1 | |
| ## optional: configure an ip to the bridge to allow remote access | |
| ifconfig br0 192.168.1.111 netmask 255.255.255.0 up | |
| route add default gw 192.168.1.1 dev br0 | |
| echo "$0: done bridge" |
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Dear author,
after reboot, ifconfig shows br0, eth0,eth1 ip address. I thought eth0, eth1 are going to use br0 ip. why they have their own ip?
pi@raspberrypi:~ $ ifconfig
br0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.8.111 netmask 255.255.255.0 broadcast 192.168.8.255
inet6 fe80::ba27:ebff:fecd:4b96 prefixlen 64 scopeid 0x20
ether b8:27:eb:cd:4b:96 txqueuelen 1000 (Ethernet)
RX packets 42 bytes 8141 (7.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 38 bytes 4772 (4.6 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0: flags=4419<UP,BROADCAST,RUNNING,PROMISC,MULTICAST> mtu 1500
inet 192.168.1.104 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::6fd5:a9f5:54a1:c332 prefixlen 64 scopeid 0x20
ether b8:27:eb:cd:4b:96 txqueuelen 1000 (Ethernet)
RX packets 62 bytes 11794 (11.5 KiB)
RX errors 0 dropped 19 overruns 0 frame 0
TX packets 63 bytes 8167 (7.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 169.254.217.26 netmask 255.255.0.0 broadcast 169.254.255.255
inet6 fe80::f89:dbcd:4cba:e496 prefixlen 64 scopeid 0x20
ether d8:eb:97:b9:38:75 txqueuelen 1000 (Ethernet)
RX packets 60 bytes 8491 (8.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 74 bytes 11134 (10.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10
loop txqueuelen 1000 (Local Loopback)
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
wlan0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.74.32.66 netmask 255.255.254.0 broadcast 10.74.33.255
inet6 fe80::a55d:2f0d:fbe8:b40b prefixlen 64 scopeid 0x20
ether b8:27:eb:98:1e:c3 txqueuelen 1000 (Ethernet)
RX packets 787 bytes 407312 (397.7 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 155 bytes 29504 (28.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0