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Does DHCP work over/through a bridge?

April 26, 2017bridge DHCP

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Does DHCP work over/through a bridge?

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The bridge will forward DHCP traffic (broadcasts) and responses. You can also use DHCP to set the local IP address of the bridge pseudo-interface. One common mistake is that the default bridge forwarding delay setting is 30 seconds. This means that for the first 30 seconds after an interface joins a bridge, it won’t send anything. This is because if the bridge is being used in a complex topology, it needs to discover other bridges and not create loops. This problem was one of the reasons for the creation of Rapid Spanning Tree Protocol (RSTP). If the bridge is being used standalone (no other bridges near by). Then it is safe to turn the forwarding delay off (set it to zero), before adding interface to a bridge. Then you can run DHCP client right away.