From: Ian Stong (istong@stong.org)
Date: Thu Sep 29 2005 - 23:40:46 GMT-3
Couple of thoughts. If you have the option of putting a switch in front of
R1 and R2 then you could run HSRP on the outside as well to influence which
router accepts incoming packets.
If you want to maintain separate connections on the outside and not run HSRP
on the outside but want to do what you ask - then I would respond by saying
what is the scenario where R1 is no longer master and R2 becomes master?
I.E. if R1 is no longer master than likely the router has a problem and
won't advertise or route packets anyway. So seems to me that R2 being the
live router would advertise and hence receive the traffic anyway. As a side
affect it also becomes the master. You could tweak it a bit more by tracking
the outside interface of each router for your inside HSRP interfaces.
One side scenario would be to link R1 and R2 directly together to handle the
one scenario where R1's internal link is down but R1 is up and receiving
traffic - it could pass the traffic to R2 and R2 would send to the internal
lan. But again if R1's internal interface is down and you have configured
dynamic routing - R1 would stop advertising the internal lan and hence
traffic would be advertised and come in via R2.
If I'm not understanding your scenario properly please advise.
Thanks,
Ian
www.ccie4u.com
Rack Rentals and discounted lab scenarios
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Geert Nijs
Sent: Thursday, September 29, 2005 6:03 AM
To: ccielab@groupstudy.com
Subject: changing incoming routing based on vrrp/hsrp
Hi all,
I am looking for a way to change incoming packets based on which router
is HSRP active, in the following topology:
| |
| |
R1 R2
| |
-------LAN 1 -----------
Router R1 and R2 are running VRRP or HSRP for LAN 1
If R1 is HSRP master, i want packets for LAN1 to come in via R1
If R2 becomes HSRP master, i want packets for LAN1 to come in via R2
This can be done by changing the routing metric of the R1 and R2 uplinks
or by configuring R1 and R2 in such a way that it wil
not advertise LAN1 when it is HSRP slave, but how to do this
automatically ??
Anyone an idea on how to accomplish this..........mmm..there must be a
way....
regards,
Geert Nijs
CCIE #13729
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