Swati -
I think that The 1 hour architectural constant you referring to is the
maximum age that an LSA can attain and use for LSA flush and to maintain
updated routing table i.e. MaxAge, but router re originate its self
originated LSAs every 30 minutes - LSRefreshTime (see RFC 2328 Appendix
B).
If a router redistribute 80,000 BGP route in to the AS it originate
80,000 AS - External LSAs. Every LSA re originated every 1800-second
i.e. 1800/80,000 ~23 ms

-----Original Message-----
From: Swati Rastogi [mailto:swatirstogiYAHOO.COM]
Sent: Tuesday, August 28, 2001 1:19 PM
To: OSPFDISCUSS.MICROSOFT.COM
Subject: 80,000 LSAs

Hi,
There is an age field in OSPF which is an architectural constant set to
one
hour. 1 hour seems like a long time but if we infact redistribute full
BGP
routing into OSPF we will be then refreshing at a very fast rate. I want
to
know as to how we arrive at the figure that with about 80,000 LSAs we
require a refresh of every 23ms (As given by Dave Katz on Nanog)
Thanks a lot
Swati

_________________________________________________________
Do You Yahoo!?
Get your free yahoo.com address at http://mail.yahoo.com

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]