Comtech EF Data SLM-5650A Vipersat - Manual (Page 83)

Chapter 3 - Using the Web Server Interface (WSI) 3-43
Additional Routing Configuration
Hello Interval
The Hello Interval parameter is the timer value for sending the Hello
packet on the specified interface. This is a periodic handshake and
‘keepalive’ message that establishes and tests the link up/down status to
determine neighbor reachability.
Default value is 10 seconds. Range is 1-65535.
Dead Interval
The Dead Interval parameter is a timer value used for specifying the
period after which a non-responding neighbor is considered dead. Note
that this setting must be the same for all routers attached to a common
network.
Default value is 40 seconds. Range is 1-65535.
Authentication Key
Setting the Authentication Key requires that all OSPF packets be
authenticated, guaranteeing that only trusted routers will be allowed to
propogate routing 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.
3. If parameter settings were changed, click on the Submit button.
OSPF Timeout Description
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