Section: 8.144 SGi PtP Tunnel Address
Content: SGi PtP Tunnel Address is coded as depicted in Figure 8.144-1. Figure 8.144-1: SGi PtP Tunnel Address The following flags are coded within Octet 5: - Bit 1 – V4: If this bit is set to "1", then the IPv4 address field shall be present, otherwise it shall be absent. Bit 2 shall be set to "0" when Bit 1 is set to "1". - Bit 2 – V6: If this bit is set to "1", then the IPv6 address field shall be present, otherwise it shall be absent. Bit 1 shall be set to "0" when Bit 2 is set to "1". - Bit 3 – Port: If this bit is set to "1", then the Port Number field shall be present, otherwise it shall be absent. When the IPv4 address field is present, octets m to (m+3) shall contains an IPv4 address. Bit 8 of Octet m represents the most significant bit of the IPv4 address and bit 1 of octet (m+3) the least significant bit. When the IPv6 address field is present, octets p to (p+15) shall contain the IPv6 Prefix and Interface Identifier. Bit 8 of octet p represents the most significant bit of the IPv6 Prefix and Interface Identifier and bit 1 of octet (p+15) the least significant bit. When the UDP port field is present, octets q to (q+1) shall contain a UDP port number. Bit 8 of Octet q represents the most significant bit of the port number and bit 1 of octet (q+1) the least significant bit.