From: raul raul (juvenn@hotmail.com)
Date: Wed Jul 09 2008 - 04:10:17 ART
LSA types are defined as
follows:
LSA Name Description
1 Router LSA
Generated by all routers in an area to describe
their directly attached links (intra-area routes).
Does not leave the area.
2 Network LSA
Generated by the DR of a broadcast or nonbroadcast
segment to describe the neighbors
connected to that segment. Does not leave the
area.
3 Summary LSA
Generated by the area border router (ABR) to
describe a route to neighbors outside the area
(inter-area route).
4 Summary LSA
Generated by the ABR to describe a route to an
autonomous system border router (ASBR) to
neighbors outside the area.
5 External LSA
Generated by the ASBR to describe routes
redistributed into the area. These routes appear
as E1 or E2 in the IP routing table. E2 (default)
uses a static cost throughout the OSPF domain,
as it only takes the cost into account that is
reported at redistribution. E1 uses a cumulative
cost of the cost reported into the OSPF domain at
redistribution plus the local cost to the ASBR.
6 Multicast LSA Used in multicast OSPF. Not supported by Cisco.
7 NSSA External
LSA
Generated by an ASBR inside a not-so-stubby
(NSSA) area to describe routes redistributed into
the NSSA area. LSA 7 is translated into LSA 5 as
it leaves the NSSA area. These routes appear as
N1 or N2 in the IP routing table inside the NSSA
area. Much like LSA 5, N2 is a static cost while
N1 is a cumulative cost that includes the cost up
to the ASBR.
> Date: Wed, 9 Jul 2008 11:05:08 +1200> From: redkidneybeans@gmail.com> To: ashwani.ranpise@gmail.com> Subject: Re: Explain OSPF LSA types> CC: ccielab@groupstudy.com> > If you have the IEWB vol2, have a look at lab 4. There is a table in the> solutions guide that might help you..> > On Wed, Jul 9, 2008 at 9:32 AM, Ashwani ranpise <ashwani.ranpise@gmail.com>> wrote:> > > Hello Experts,> >> > Can someone explain OSPF LSA types ? Which LSA type will flow from one area> > to another or who will generate different types of LSA? I was reading RFC> > 2328 OSPF Ver2 & I couldn't understand how & who will generate these LSA's.> > Can some one give me an example or small LAB for this?> >> > Any help will be appreciated.> >> > Thanks in advance.> >> > Ashwani> >> >> > _______________________________________________________________________> > Subscription information may be found at:> > http://www.groupstudy.com/list/CCIELab.html> >> >> >> >> >> > > -- > Thank You,> > > _______________!
________________________________________________________> Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html> > > >
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