Comtech EF Data SLM-5650A Vipersat Parameter Editor - Manual (Page 50)

Routing
2-34 SLM-5650A Parameter Editor User Guide
Default value is 40 seconds. Range is 1-65535.
Authentication Key
Setting the Authentication Key requires that all OSPF packets be authenti-
cated, guaranteeing that only trusted routers will be allowed to propogate rout-
ing information. This can only be set when the Message Digest Key is not used.
A simple password of up to eight characters can be specified.
Message Digest Key
The Message Digest Key is a security key used to create the message digest,
and serves as both CRC (for file integrity) and cryptographic hash function /
security encryption (128-bit). This can only be set when an Authentication Key
is not used.
Allows a cryptographic password of up to 16 characters to be specified. Note
that, if the key type is not first specified, entering a string in the password field
will cause this key to be used by default.
Timeout Function
The Hub maintains a map list of all active Remotes (those sending Hellos).
Each router (SLM-5650A) maintains a counter of missed Hellos for each router
(SLM-5650A) at the other end of the WAN (satellite link). This counter is reset
to zero (0) upon receipt of a Hello. If the number of missed Hellos multiplied by
the Hello Interval exceeds the Dead Interval, the counter is terminated, that
router is removed from the Hub’s map list, and any routes that originated from
that SLM-5650A are deleted. If/when a subsequent Hello is received from this
same modem/router, it is treated as a first Hello and the handshake protocol is
initiated once again.