Performing duplicate address detection for an integrated routing and bridging device

A non-transitory computer-readable medium storing instructions, the instructions comprising:

• one or more instructions that, when executed by one or more processors, cause the one or more processors to:
• detect activation of a layer 2 interface of a traffic transfer device after activation of a layer 3 interface of the traffic transfer device;
• activate a filter to prevent transmission of network traffic via the layer 2 interface based on detecting activation of the layer 2 interface;
• perform duplicate address detection, in association with the layer 2 interface, for a first layer 3 network address associated with the traffic transfer device;
• determine whether the first layer 3 network address matches a second layer 3 network address, associated with a device that communicates with the traffic transfer device via the layer 2 interface, based on performing the duplicate address detection;
• and
• selectively maintain or deactivate the filter based on determining whether the first layer 3 network address matches the second layer 3 network address.

A method, comprising:

• activating, by a network device, a layer 3 interface based on activation of a first layer 2 interface;
• detecting, by the network device, activation of a second layer 2 after activating the layer 3 interface;
• activating, by the network device, a filter to prevent transfer of network traffic via the second layer 2 interface based on detecting activation of the second layer 2 interface;
• performing, by the network device, duplicate address detection, in association with the second layer 2 interface, for a layer 3 network address assigned to the network device;
• determining, by the network device, whether the layer 3 network address is a duplicate network address based on performing the duplicate address detection;
• and
• selectively maintaining or deactivating, by the network device, the filter based on determining whether the layer 3 network address is a duplicate network address.