From: Scott Vermillion (scott_ccie_list@it-ag.com)
Date: Mon Jan 07 2008 - 15:18:03 ARST
John,
Look into PBR and track objects (and possibly tunnels, but likely not
necessary for only two links). The idea is to conditionally static route if
a particular track object is available. Logic is something like this:
Set a static route to a router D loopback pointing out the static path
physical interface (do NOT advertise this loopback into EIGRP at router D).
(Alternatively, you could just track the physical interface on router D that
terminates the static path, but I generally prefer loopbacks for this sort
of thing). Track this object for reachability at router A. Set a PBR
policy at router A to route everything via the static path as long as that
track object is reachable. Otherwise, punt to the routing table, which is
the default PBR behavior.
Regards,
Scott
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of john
white
Sent: Monday, January 07, 2008 8:40 AM
To: ccielab@groupstudy.com
Subject: EIGRP and Static Routing failover
Hi All,
I have a router A that connects to Router B and Router C. Router B in turn
connects to another Router D. Router C also connects to Router D but via
another router X.
Hence there are 2 paths on the network from router A to router D
i.e Path1: A ----- B -------- D and Path 2: A -------- C -------X
-------D
Path 1 has EIGRP configured all the way for all networks i.e Router A runs
Eigrp with router B which also runs eigrp with router D
Path 2 has static routing configured all the way for all networks
Routing works perfectly fine with both of them independently .
But I need to have them function in automatic failover mode. I.e. once the
static route fails, the EIGRP-learned route should kick in without manual
intervention.
Right now, if there is a failure between Router C and Router X, the EIGRP
learned route to Router D's loopback does not kick in and so I loose
connectivity from Router A to Router D's loopback because the static route
is still in the routing table cause of its lower AD until I manually
intervene but I need the failover to be automated.
Which solutions can i use to achieve this automatic failover? I am
preparing for my CCIE lab.
Thanks
BR
John White
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