From: Gary Duncanson (gary.duncanson@googlemail.com)
Date: Sat Oct 13 2007 - 06:57:27 ART
Interesting that gig or fastethernet isn't mentioned. It seems that based on
the purpose of eigrp stub command i.e reducing the amount of time that
network outages require address to be in an active state by eliminating
queries you may defeat the object by not applying it on all of them in the
situations described.
In a hub and spoke design you may find that the spoke routers are not used
to provide transit paths to any addresses in the network. In the case on
ethernet you probably don't want routers on the same subnet offering
themselves as an alternative path to get someplace in the event of an outage
when they dont have the bandwidth to act as transit. It's all about reducing
queries to and from stub routers so you I suppose you need some consistency
for eigrp stub routing to be truly effective.
See the case study in
Doyle Vol I Second Edition pp 309
No doubt others will expand further!
Gary
----- Original Message -----
From: "shiran guez" <shiranp3@gmail.com>
To: "Cisco certification" <ccielab@groupstudy.com>
Sent: Saturday, October 13, 2007 9:57 AM
Subject: EIGRP Stub
> Can someone clarify that note from the command guide of EIGRP:
>
>
> *Multi-access interfaces, such as ATM, Ethernet, Frame Relay, ISDN PRI,
> and
> X.25, are supported by the
> EIGRP Stub Routing feature only when all routers on that interface, except
> the hub, are configured as
> stub routers.*
> Dose it mean that when I am using in for example a FR hub and spoke
>
> R1 is hub and R2 R3 R4 are spokes, if I enable EIGRPStub in R2 I must
> enable
> it on R3 and R4 as well?
>
> Or if I am in a Ethernet Segment :
>
> R1 and R2 and R3 are on the same segment if one is Stub all need to be
> Stub
> Router?
>
> it doesn't make any sense!
>
>
> --
> Shiran Guez
> MCSE CCNP NCE1
> http://cciep3.blogspot.com
> http://www.linkedin.com/in/cciep3
>
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