OSPF Puppy

OSPF Network Types

OSPF Network Type	Hello Interval	Dead Interval	DR Required	RFC Based	Neighbors Statement Required	Default for which Interface Types
Point to Point	10	40	No	Yes/No*	No	HDLC/PPP Circuits
Point to Multipoint	30	120	No	Yes	No
Point to Multipoint Non-broadcast**	30	120	No	No	Yes
Broadcast	10	40	Yes	Yes/No***	No	LAN
Non-Broadcast	30	120	Yes	Yes	Yes	NBMA (Multipoint interface

* Yes on HDLC/PPP circuits, no on Frame-relay with P-to-P subinterfaces
** Cisco only for SVC support
*** RFC for LAN interfaces, Cisco only for Frame

Point to Point and Point to Multipoint are compatible if you change the timers
Broadcast and Non-Broadcast are compatible if you change the timers
Point to anything is not compatible with (non)Broadcast, if you match the timers they will get to a full state, but with not routes exchanged.

OSPF Area Types

OSPFv2 Puppy

OSPFv3 Puppy

Area Type	LSA1	LSA2	LSA3	LSA4	LSA5	LSA7	ABR	Internal Router
Backbone	X	X	X	X	X
Standard	X	X	X	X	X
Stub	X	X	X	X			Area 2 stub	Area 2 stub
Total Stub	X	X	*				Area 3 stub no-summary	Area 3 stub
NSSA	X	X	X	X		X	Area 4 NSSA	Area 4 NSSA
Total NSSA	X	X	*			X	Area 5 NSSA no-summary	Area 5 NSSA

* Default looks like an LSA3

OSPFv2	OSPFv3	Both
LSA	Data Base	Routing Table	Notes
1	Router	O
2	Network		Advertises Router ID from DR
3	Summary	O IA
	Inter-Area Prefix
4	Summary		This from the ABR to inform the area how to get to the router ID of the ASBR from another area.
	Inter-Area Router-ID
5	External	O E1/2
6	MOSPF		Cisco does not support MOSPF
	N/A
7	NSSA-External	O N1/2
8	External Attributes		Deprecated
	Link Local	O
9	Link Opaque		Opaque LSA are for things like MPLS TE through an OSPF domain
	Intra-Area Prefix	O
10	Area Opaque
	N/A
11	Domain Opaque
	N/A
12	Opaque LSA		LSA type 12 has a scope field, therefore only one Opaque LSA is needed

For more information or if you have any questions please e-mail me: Johnny Bass
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