I Have come across this. Ref: CCNP Quick Reference Guide Denise Donohue Brent Stewart Jerold Swan Cisco Press
CCNPChapter 3: OSPF [ 35 ] *OSPF supports five network types:* *■ NBMA—Default for multipoint serial interfaces. RFC-compliant* *mode that uses DRs and requires manual neighbor configuration.* *■ Point-to–multipoint (P2MP)—Doesn’t use DRs so adjacencies* *increase logarithmically with routers. Resilient RFC compliant mode* *that automatically discovers neighbors.* *CCNP* *■ Point-to-multipoint nonbroadcast (P2MNB)—Proprietary mode that* *is used on Layer 2 facilities where dynamic neighbor discovery is not* *supported. Requires manual neighbor configuration.* *■ Broadcast—Default mode for LANs. Uses DRs and automatic neighbor* *discovery. Proprietary when used on WAN interface.* *■ Point-to–point (P2P)—Proprietary mode that discovers neighbors and* *doesn’t require a DR.* -- Best Regards, Saleh Hassan Batouq On Sun, Mar 3, 2013 at 8:11 PM, Jim Newell <[email protected]> wrote: > I have come across a fair amount of documentation about network types and > OSPF > (broadcast, non-broadcast, point-to-point, point-to-multipoint, > point-to-multipoint non-broadcast.) It is generally clear how each of > these > behaves with regard to hello and dead timers, whether or not a DR election > is > held and if the hellos are sent via unicast or multicast. > > One thing I have noticed is there seems to be a lot of inconsistent > information concerning which of the network types are Cisco proprietary. I > have read in some places that the broadcast network type is while others > state > that broadcast is a standard according the RFC. In some cases > point-to-point, > point-to-multipoint and point-to-multipoint non-broadcast are said to be > Cisco > proprietary, but others seem to disagree on one or another. I have > searched > for an opinion in Cisco’s documentation but could not find anything on this > topic. > > Has anyone else come across this and have you found any reliable > documentation > to back it up? > > Much appreciated > jpn > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
