Hi Folks,

I have somewhat of a general question regarding the number of LSAs per OSPF
Area - If this is the wrong venue I apologize in advance, however there
seems to be no authoritative sources for this type of detailed information
on OSPF - except for this arena.

My question is this - Is there a formula/tool to calculate
the 'recommended' maximum number of LSAs per Area based on your Hardware
specs (i.e. Processor, Memory, Average Utilization, Vendor platform, etc)?

The reason I ask is that almost all literature references the following:
* Number of routers per Area
* Number of Areas per ABR
* Number of ABRs/ASBRs per OSPF Domain

If one were to follow the above rules/guidelines with MultiLayer
Switches/Routers which have an infinite number of interfaces (relative to
Traditional Software based routers which have a finite number of interfaces
based on chassis size and module offerings) - an Area with 20 routers
(MultiLayer) could generate more LSAs than two Areas populated with 50
Software based routers combined. Which raises a number of questions with
regards to the above rules/guidelines - At what point do LSA databases
become too big to manage and as a result network instability occurs.

If there is another audience this question should be directed to kindly
advise.

Thanks in advance,

John Baird
416 983-1451 (Desk)
416 308-1963 (IP Tele.)

+_+

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