(Encapsulating Security Protocol)
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Security Parameters Index (SPI)
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Sequence Number
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Payload (variable length)
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Padding (<= 255 bytes)
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padding continued
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Pad Length |
Next Header
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Authentication Data (variable length)
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IGMP Parameters
Security Parameters index (SPI)8 bits Sequence Number (monotonically increasing). 32 bits Payload Length - size of AH header 32 bits Payload Data. variable length. Padding - pad to end of payload block. (0-255 bytes). Pad Length (length of Padding field). 16 bits Next Header - protocol of the payload data. 16 bits Authentication Data (intecrity check value). variable length