2.2.1 Replication Partner AutoDiscovery Message
NBNS Replication Partner AutoDiscovery Message is used to announce that a NBNS server is running and functional, or to announce that a NBNS server is shutting down. The following diagram shows the NBNS Replication Partner AutoDiscovery Message.
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SigId |
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OpCode |
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NBNS IPv4 Address (variable) |
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SigId (4 bytes): An unsigned 32-bit integer indicating that this message is a NBNS Replication Partner AutoDiscovery Message. It is in little-endian byte order. The valid range is 0x0000ABCD to 0x0000ABCF inclusive. A packet with SigId outside this range MUST be discarded upon receipt. When sending a packet, only 0x0000ABCD MUST be used. Other values are reserved.
OpCode (4 bytes): An unsigned 32-bit integer. It is in little-endian byte order.
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The following are the possible values for the OpCode:
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Value
Meaning
0x00000000
NBNS server MUST announce that it is present and functional using this OpCode.
0x00000001
NBNS server MUST announce that it is shutting down using this OpCode.
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Other OpCodes MUST be treated as 0x00000001 upon receipt.
NBNS IPv4 Address (variable): These fields are a list of all the IPv4 addresses configured on the NBNS server in big-endian byte order. If any IPv4 address is 0.0.0.0, this IPv4 address and all the IPv4 addresses after it MUST be ignored.<3>