Re: EIGRP with HSRP Question.

From: JB Poplawski <jb.poplawski_at_gmail.com>
Date: Thu, 7 Feb 2013 23:29:51 -0600

Routing entry for 192.168.0.0/8
  Known via "eigrp 100", distance 170, metric 51456, type external
  Redistributing via eigrp 100
  Last update from 192.168.1.2 on GigabitEthernet0/1, 06:14:27 ago
  Routing Descriptor Blocks:
  * 192.168.1.3, from 192.168.1.3, 06:14:27 ago, via GigabitEthernet0/1
      Route metric is 51456, traffic share count is 1
      Total delay is 1010 microseconds, minimum bandwidth is 100000 Kbit
      Reliability 255/255, minimum MTU 1492 bytes
      Loading 1/255, Hops 1
    192.168.1.2, from 192.168.1.2, 06:14:27 ago, via GigabitEthernet0/1
      Route metric is 51456, traffic share count is 1
      Total delay is 1010 microseconds, minimum bandwidth is 100000 Kbit
      Reliability 255/255, minimum MTU 1492 bytes
      Loading 1/255, Hops 1

On Thu, Feb 7, 2013 at 11:13 PM, marc edwards <renorider_at_gmail.com> wrote:

> Longest prefix match always wins. Remove summary to reveal more
> specific routes. Could be that simple or as complicated as you want to
> make it.
>
> Regards,
>
> Marc
>
> On Thu, Feb 7, 2013 at 8:00 PM, JB Poplawski <jb.poplawski_at_gmail.com>
> wrote:
> > Both core routers/switches advertise the same subnet. WAN Router sees
> both
> > routes, but prefers the higher IP (or so it seems).
> >
> > If I had 5 routers, highest IP wins, right? If that's the case, I need
> to
> > get my primary HSRP/STP Switch to have the higher IP in the group.
> >
> > Trying to avoid any latency or additional hop in this solution.
> >
> >
> > On Thu, Feb 7, 2013 at 9:41 PM, marc edwards <renorider_at_gmail.com>
> wrote:
> >>
> >> Take advertisement off R1 and let it advertise all specific subnets in
> >> 192.168. Hard to say what without knowing what is attempting to be
> >> accomplished. When you say Router 2 leads the pack, I assume that this
> >> is from the view of your WAN router?Again without knowing exactly what
> >> is trying to be accomplished, if this is for lab or real design makes
> >> it tough to validate any decisions. But I can guarantee that longest
> >> prefix match will be the #1 routing selection and easiest to change by
> >> simply removing R1's summary.
> >>
> >> Regards,
> >>
> >> Marc
> >>
> >> On Thu, Feb 7, 2013 at 4:26 PM, Johnny Morris <johnnymorris01_at_gmail.com
> >
> >> wrote:
> >> > What is your IGP ? You wouldn't necessarily mess with HSRP to
> influence
> >> > an
> >> > outbound route to a neighbor, You can use an offset-list for example
> >> > with
> >> > EIGRP on the two routers facing the 3rd router and reference an ACL
> with
> >> > the redistributed static route going to your third router. I would
> look
> >> > at
> >> > the metric that is being received from both routers and offset it
> >> > depending
> >> > on your IGP or routing protocol. For example of the route was received
> >> > with
> >> > the same metric and you had two routes to get to the network you could
> >> > do
> >> > the following with eigrp:
> >> >
> >> > An example would be
> >> >
> >> > R1
> >> >
> >> > router eigrp 1
> >> >
> >> > red static
> >> >
> >> > Offset- list 1 out 132000 INTERFACE
> >> >
> >> > access-list 1 p 192.168.0.0
> >> >
> >> > ip route 192.168.0.0 255.255.0.0 x.x.x.x
> >> >
> >> >
> >> > R2
> >> >
> >> > router eigrp 1
> >> >
> >> > red static
> >> >
> >> > Offset- list 1 out 132500 INTERFACE
> >> >
> >> > access-list 1 p 192.168.0.0
> >> >
> >> > ip route 192.168.0.0 255.255.0.0 x.x.x.x
> >> >
> >> >
> >> > Again depends on your routing protocol you are running between the
> >> > routers,
> >> > because you mentioned Variance I assume you are running EIGRP.
> >> >
> >> >
> >> > On Feb 7, 2013 6:23 PM, "JB Poplawski" <jb.poplawski_at_gmail.com>
> wrote:
> >> >
> >> >> Good afternoon,
> >> >>
> >> >> Have a scenario, it might be nit-picky, but figured I should ask.
> >> >>
> >> >> I have two routers running HSRP
> >> >> HSRP VIP - 192.168.1.1
> >> >> Router 1 Active - 192.168.1.2
> >> >> Router 2 Standby - 192.168.1.3
> >> >>
> >> >> Both routers are redistributing static for a network summary.
> >> >> 192.168.0.0/16
> >> >>
> >> >> I have an additional WAN router that comes in and is on that same
> Layer
> >> >> 3
> >> >> subnet.
> >> >>
> >> >> WAN - 192.168.1.10
> >> >>
> >> >> If I do a show ip route 192.168.0.0, I see both routers advertising
> the
> >> >> summary, Router 2 is leading the pack for who owns that route. My
> >> >> Router 1
> >> >> is both the VIP holder AND STP root, though.
> >> >>
> >> >> What am I doing wrong? I assume I can add distance statement and
> drop
> >> >> the
> >> >> standby down a peg or two. Are there any cleaner ways? Drop
> variance
> >> >> down?Any help is greatly appreciated.
> >> >>
> >> >> Regards,
> >> >> JB
> >> >>
> >> >>
> >> >> Blogs and organic groups at http://www.ccie.net
> >> >>
> >> >>
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Received on Thu Feb 07 2013 - 23:29:51 ART

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