Queries in EIGRP will traverse the AS, and any EIGRP
ASs that are redistributions from the origin EIGRP AS.
BGP, et al, can kill this, but this is the same as a
summary in EIGRP. Once a query hits a summary point it
goes one hop further and dies.
--- Arthur Simplina <[EMAIL PROTECTED]> wrote:
> Using EIGRP, queries are propagated throughout the
> network. If this is a
> large enterprise network, queries will be sent thru
> the network boundary.
> Unlike OSPF where areas can be created to partition
> the network and make it
> more manageable, i.e., changes and subsequent route
> recalculations are
> isolated within the particular area, EIGRP has one
> single AS where routers
> go in active mode in trying to find a feasible
> successor to a failed link.In
> OSPF, summarization is done at the ABRs while in
> EIGRP, this can be done in
> any router.
>
> I read from the Routing Certification Guide that
> “summarization is the best
> way to limit the query range of EIGRP networks” and
> that, queries can be
> managed effectively by summarization and filters.
>
> Can somebody explain this more fully?
>
> I can better visualize the OSPF areas that scale
> well to large enterprise
> networks. But I don’t see an analogy to this with
> EIGRP except that is has
> an extremely fast convergence mechanism when the
> routers have feasible
> successors and has a large diameter that addresses
> the scalability issues.
>
> TIA.
>
>
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Robert Padjen
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