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Am 10.07.2011 16:50, schrieb Daniel Hilst Selli: |
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> Hi people, I'm using brctl to create bridges for some qemu guests... |
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> |
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> I create a br0 with brctl addbr br0 |
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> the I attach my wireless card to it with brctl addif br0 eth1 |
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> |
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> Then some times I get right ip with dhcpcd br0 (after doing 'ifconfig |
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> br0 promisc up') |
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> but some times I got an strange ip |
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> The questions are |
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> What the promisc means? |
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> |
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> I can't understand for really the bridge concepts .. I just know that |
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> you attach |
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> cards to it, but can't understand how it route things |
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> |
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> cheers |
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What kind of "strange" IP? Anything from the 169.254.* range? |
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Please look at [1]. That looks like it describes your problem. |
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|
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Conceptionally, think of a bridge as a network switch. It retransmits |
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Ethernet packets on OSI layer two between different endpoints as |
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necessary just like a real switch would do. |
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|
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[1] |
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http://www.linuxfoundation.org/collaborate/workgroups/networking/bridge#Does_DHCP_work_over.2Fthrough_a_bridge.3F |
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|
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Hope this helps, |
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Florian Philipp |
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