7.2. MAC/IP Advertisement Route (MAC/IP 通告路由)

7.2. MAC/IP Advertisement Route (MAC/IP 通告路由)

MAC/IP Advertisement route type specific EVPN NLRI 由以下内容组成:

                +---------------------------------------+
                |  RD (8 octets)                        |
                +---------------------------------------+
                |Ethernet Segment Identifier (10 octets)|
                +---------------------------------------+
                |  Ethernet Tag ID (4 octets)           |
                +---------------------------------------+
                |  MAC Address Length (1 octet)         |
                +---------------------------------------+
                |  MAC Address (6 octets)               |
                +---------------------------------------+
                |  IP Address Length (1 octet)          |
                +---------------------------------------+
                |  IP Address (0, 4, or 16 octets)      |
                +---------------------------------------+
                |  MPLS Label1 (3 octets)               |
                +---------------------------------------+
                |  MPLS Label2 (0 or 3 octets)          |
                +---------------------------------------+

为了进行 BGP route key 处理, 只有 Ethernet Tag ID, MAC Address Length, MAC Address, IP Address Length 和 IP Address 字段被视为 NLRI 中前缀的一部分. Ethernet Segment Identifier, MPLS Label1 和 MPLS Label2 字段应被视为路由属性, 而不是 "route" 本身的一部分. IP 地址长度和 MAC 地址长度均以 bit 为单位.

有关此路由的过程和用法, 请参阅第 9 节 ("Determining Reachability to Unicast MAC Addresses") 和第 14 节 ("Load Balancing of Unicast Packets").