From: Erick B. (erickbe@yahoo.com)
Date: Tue Jan 14 2003 - 03:59:36 GMT-3
You could also use offset-list with an ACL for
selecting routes in EIGRP.
--- Joe Chang <changjoe@earthlink.net> wrote:
> You can adjust the delay settings on the remote site
> routers, thereby
> influencing the feasable distance of received
> routes. Having said that, is
> delay or bandwidth adjustable at the subinterface
> level? I'm guessing it
> should be, since delay and bw are really just
> logical, not physical, values.
>
> ----- Original Message -----
> From: "Vinay Arora" <cybervinay@yahoo.com>
> To: "'Stong, Ian C [GMG]'"
> <Ian.C.Stong@mail.sprint.com>;
> <ccielab@groupstudy.com>
> Sent: Monday, January 13, 2003 3:01 PM
> Subject: RE: Selecting a preferred route when using
> EIGRP
>
>
> > I provided the link for reference to EIGRP
> tweaking and does not depict my
> > scenario.
> > The remote sites have only one physical link to
> frame relay provider and
> > have 2 PVCs one each to both head ends. Tweaking
> the EIGRP parameters will
> > allow to select the PVC circuit I want to use at
> the remote site.
> >
> > Since both heads will be talking EIGRP with each
> others and both will have
> > routes to all remote sites, how do I designate
> half of the remote sites
> to
> > be active on head-end 1 and remaining half on
> head-end 2?
> >
> > Vinay
> >
> >
> > -----Original Message-----
> > From: Stong, Ian C [GMG]
> [mailto:Ian.C.Stong@mail.sprint.com]
> > Sent: Monday, January 13, 2003 1:51 PM
> > To: Vinay Arora; ccielab@groupstudy.com
> > Subject: RE: Selecting a preferred route when
> using EIGRP
> >
> >
> > I haven't implemented this in production in awhile
> since most larger
> > networks use OSPF or ISIS so take with a grain of
> salt...
> > I'm not clear as to your remote sites and whether
> they will also have
> > redundant links but will assume not. If you have
> equal cost paths into
> your
> > network you can let EIGRP naturally load balance
> from the provider to your
> > network. I'm not sure that the link and configs
> you provided apply to
> your
> > situation. The likelihood is your remote sites
> will compute the total
> cost
> > from end to end and take whichever pipe has the
> least total cost. You can
> > influence the paths some by using more than the
> standard bandwidth and
> delay
> > that are used by default but not sure how much
> that would buy you if the
> > links turn out to have equal costs. If the costs
> are not equal than one
> > will be preferred over the other of course. If
> you do decide to tweak I
> > would suggest using the bandwidth and
> administrative distance options with
> > care. Try the other options first such as
> changing the composite metric
> or
> > delay values.
> >
> >
> > Best of luck,
> >
> > Ian
> >
> > www.ccie4u.com
> > Rack Rentals and Scenarios
> >
> >
> > -----Original Message-----
> > From: Vinay Arora [mailto:cybervinay@yahoo.com]
> > Sent: Monday, January 13, 2003 12:55 PM
> > To: ccielab@groupstudy.com
> > Subject: Selecting a preferred route when using
> EIGRP
> >
> >
> > We have a hub and spoke architecture with all
> remote sites being connected
> > to and accessing servers at the central site.
> EIGRP is the routing
> protocol
> > and remote sites need to communicate to central
> site only and not to each
> > other.
> >
> > We will be having two physical frame-relay T1
> pipes at central site to the
> > frame relay provider's cloud. These two will be
> terminating to different
> > head end routers at central site. We will be
> having two PVCs each for
> remote
> > locations and these PVCs will terminate on
> different head-end routers.
> >
> > I need to make half of the PVC active on first
> head end and remaining PVC
> on
> > second head-end.
> > When one of the head-end routers goes down the PVC
> on second should
> > automatically become active.
> > I know I will have to do changes to the EIGRP
> config of routers at remote
> > locations (EIGRP variables delay, offset, AD, BW
> etc.)
> >
> > I am considering the various options for selecting
> a preferred route when
> > using EIGRP as detailed in the document at
> > http://www.cisco.com/warp/public/103/14.shtml#O2
> >
> > This is a very common scenario and I want to check
> how people do it
> > normally? Appreciate any thoughts, ideas and
> concerns.
> >
> > TIA
> >
> > Vinay Arora
> > .
> > .
> .
>
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