Configuring Ospf Authentication - HP 7102dl - ProCurve Secure Router Configuration Manual

IP Routing—Configuring RIP, OSPF, BGP, and PBR
Configuring OSPF
Interval Meaning
refresh the maximum time
before sending a new
LSA
shortest path first • the time between
(SPF) delay:
• calculation delay
• SPF hold
• the time between
C a u t i o n
15-62
The refresh interval, which dictates how often routers must send out an LSA,
must be such that routers can refresh their databases every 30 minutes. The
shortest path first (SPF) delay and hold timers save processing power by
preventing a router from continuously calculating new best routes.
Table 15-9. Global OSPF Intervals
Default
240 seconds
• 5 seconds
receiving
• 10 seconds
topological
changes and
beginning SFP
calculations
consecutive SFP
calculations
Do not change default intervals unless you have a great deal of experience
working with OSPF and understand the implications of the changes. Improp-
erly set intervals can disrupt router processes and congest the network.

Configuring OSPF Authentication

If you enable authentication on your OSPF network, then routers will not
exchange their databases to achieve adjacency until they have authenti-
cated each other with a password. OSPF authentication prevents network
devices from inadvertently joining the wrong area. In addition, hackers and
malware can send pseudo-OSPF packets to establish a neighbor relation-
ship with the routers on your private network. After this relationship is
established, the hackers and the malware writers would receive LSAs and
learn valuable information about your network. OSPF authentication
ensures that routers on your private network do not accept unauthorized
packets.
The ProCurve Secure Router supports two types of OSPF authentication:
OSPF simple password authentication
authentication with MD5
Range Command Syntax
10 to 1,800 seconds timers lsa-group-
(maximum of 30 pacing <seconds>
minutes)
• 0 to 4,294,967,295 timers spf
seconds <calculation
seconds> <hold
• 0 to 4,294,967,295
seconds>
seconds