https://community.extremenetworks.com/t5/network-architecture-design/arp/m-p/14031#M1435 Hi All<BR /> <BR /> When machines send packets through L2 to L3, if the L3 forwards the same packet to a different VLAN, it drops the original MAC ID and in turn uses its own (replaces) interface MAC ID in the forward. <BR /> <BR /> can be configured to pass on MAC IDs Fri, 20 May 2016 16:56:00 GMT Mohammed_Jashee 2016-05-20T16:56:00Z https://community.extremenetworks.com/t5/network-architecture-design/arp/m-p/14031#M1435 Hi All<BR /> <BR /> When machines send packets through L2 to L3, if the L3 forwards the same packet to a different VLAN, it drops the original MAC ID and in turn uses its own (replaces) interface MAC ID in the forward. <BR /> <BR /> can be configured to pass on MAC IDs Fri, 20 May 2016 16:56:00 GMT https://community.extremenetworks.com/t5/network-architecture-design/arp/m-p/14031#M1435 Mohammed_Jashee 2016-05-20T16:56:00Z https://community.extremenetworks.com/t5/network-architecture-design/arp/m-p/14032#M1436 No, L2 and L3 broadcast domains are different. The MAC is only used within the L2 broadcast domain. Once the packet has been forwarded to another L2 broadcast domain (VLAN) via L3 routing the source MAC has to be replaced with the MAC of the router that forwarded it to the new L2 domain. Fri, 20 May 2016 18:48:00 GMT https://community.extremenetworks.com/t5/network-architecture-design/arp/m-p/14032#M1436 Curtis_Parish1 2016-05-20T18:48:00Z