Cisco Systems DPC3827, EPC3827, 4039760 Section Field Description  Manual, Status

	How Do I Configure My DOCSIS Residential Gateway?
Section	Field Description
	 Manual
	– Encryption: The Encryption method determines the length of
	the key used to encrypt/decrypt ESP packets. Note that both
	sides must use the same method.
	– Encryption Key: This field specifies a key used to encrypt
	and decrypt IP traffic. Both character and hexadecimal values
	are acceptable in this field. Note that both sides must use the
	same Encryption Key.
	– Authentication: The Authentication method authenticates
	the Encapsulating Security Payload (ESP) packets. Select
	MD5 or SHA. Note that both sides (VPN endpoints) must
	use the same method.
	 MD5: A one-way hashing algorithm that produces a
	128-bit digest
	 SHA: A one-way hashing algorithm that produces a
	160-bit digest
	– Authentication Key: This field specifies a key used to
	authenticate IP traffic. Both character and hexadecimal
	values are acceptable in this field. Note that both sides must
	use the same Authentication Key.
	– Inbound SPI/Outbound SPI: The Security Parameter Index
	(SPI) is carried in the ESP header. This enables the receiver to
	select the SA, under which a packet should be processed. The
	SPI is a 32-bit value. Both decimal and hexadecimal values
	are acceptable, e.g., "987654321" or "0x3ade68b1". Each tunnel
	must have a unique Inbound SPI and Outbound SPI. No two
	tunnels share the same SPI. Note that the Inbound SPI must
	match the remote gateway's Outbound SPI, and vice versa.
Status	This field shows the connection status for the selected tunnel. The
	state is either Connected or Disconnected.

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