How to allocate the MAC addresses of the L3 interfaces

Hello, friend!

The MAC addresses of the L3 interfaces of the MA5300 are allocated in sequence.

For example, if the MAC address of an MA5300 is 00e0-fc00-0001, the MAC address of the first configured L3 interface is 00e0-fc00-0002, and so on. 

1. The MAC address allocation of the L3 interface on the MA5600 adopts the polling mode of 32 MAC addresses, which are allocated according to the VLAN&nbsp. ID  The value ranges from 0 to 31. 

Step 1: First obtain an offset of the MAC: an offset  = 1 +&nbsp. Interface VLAN ID  %  32; 

2. Calculate the interface MAC: interface MAC&nbsp. =  Bridge MAC  +  Offset   &nbsp.

For example, if the MAC address of an MA5600 is 00e0-fc00-0001, the MAC address offset of the L3 interface of VLAN 1 is 1+12=2, the MAC address is 00e0-fc00-0003. The MAC address offset of the Layer 3 interface in VLAN 10 is 1 + 102=11, and the MAC address is 00e0-fc00-000c. For VLAN 33, the MAC address offset is 1 + 332=2, in this case, the calculated MAC address is the same as that of VLAN 1. If there are two L3 interfaces VLAN 1 and VLAN 33, the MAC addresses of the two L3 interfaces are the same. The control board of the MA5600, however, forwards packets based on LLV. Therefore, the forwarding is not affected.

Thanks!