numbers to remember - ospf
89 - OSPF's IP Protocol number
10 - Default Hello Interval flooding in second
224.0.0.5 - multicast address of All OSPF routers in an area, for LSA flooding
224.0.0.6 - All DRs multicast address
128 - Default router priority
24 - OSPF Header size in Bytes
20 - LSA Header size in Bytes
60 - LSA Maximum age in minutes
30 - Standarad LSA refresh timer in minutes
50 - junos LSA refresh timer in minutes
Stub Area - LSA 1, 2, 3
Stub Area with no Summaries / Totally Stubby Area - LSA 1, 2
Not so Stubby Area - LSA 1, 2, 3, 7
Not so Stubby Area with no Summaries / Totally Not so Stubby Area - LSA 1, 2, 7
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