From: Joseph Saad (joseph.samir.saad@gmail.com)
Date: Sat Nov 10 2007 - 16:15:59 ART
Hi Shiran,
I am referring to IE technology Lab "NSSA Area type 7to5 LSA
Translator Election".
Regarding your Answer:
When you use a NSSA not so stubby area then the ASBR will generate N2
for external into the area.
>> "I am OK with that"
E2 is for external routes and will be generated by ASBR.
>> "I am OK with that for Normal Areas".
in a router that have under his process an Area type NSSA will convert
the Type 7 LSA to Type 5 when going from NSSA to the Backbone Area.
>> "True, but what if we have multiple ABR such as this particular
technology lab".
there are no election for ABR or ASBR, if your router have under his
process more then one area then he is ABR, if he have redistribution
(or originating a default route) then he is ASBR.
>> "True, but if you have multiple ABR's for the NSSA, one of them
(i.e. with the highest router-id) is elected for translating the type
7 into type 5 LSA".
Joseph.
On Nov 10, 2007 11:00 PM, shiran guez <shiranp3@gmail.com> wrote:
> when you use a NSSA not so stubby area then the ASBR will generate N2 for
> external into the area.
>
> E2 is for external routes and will be generated by ASBR.
>
> in a router that have under his process an Area type NSSA will convert the
> Type 7 LSA to Type 5 when going from NSSA to the Backbone Area.
>
> there are no election for ABR or ASBR, if your router have under his process
> more then one area then he is ABR, if he have redistribution (or originating
> a default route) then he is ASBR.
>
>
>
>
>
> On Nov 10, 2007 8:45 PM, Joseph Saad <joseph.samir.saad@gmail.com> wrote:
>
> >
> >
> >
> > When I have 2 ABR's for an NSSA. The elected Type 7 to Type 5 LSA
> > translator shows the route in the routing table as N2 while the other
> > ABR shows it as E2 route.
> >
> > I can understand why the non-elected ABR shows the route as E2
> > (because it receives both type 7 LSA and type 5 LSA and type 5 LSA
> > will be preferred).
> >
> > What I can't understand is why the elected router shows the route as
> > N2 though it is the one which originated the type 5 LSA and already
> > has the type 7 LSA in its database.
> >
> > Can someone shed some light on why such behavior?
> >
> > _______________________________________________________________________
> > Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
> >
>
>
>
> --
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
> http://www.linkedin.com/in/cciep3
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