Re: [nv-l] HSRP

[Leslie Clark <lclark@us.ibm.com>]

The question is not very clear, so if
this does not help, please ask again.

I suspect that you are trying to discover
two routers named xxx.xxx.xxx.201 and xxx.xxx.xxx.202,
and that you are also getting a third router called xxx.xxx.xxx.203, but
that is really the hsrp interface that moves between the other two.

I've recently struggled with the discovery
of HSRP at current maintenance levels, and came to some new conclusions.

First, those $ entries say to poll those
devices via snmp. You don't want to do that. The hsrp interfaces are not
in the Interface table, so they cannot be polled via snmp. To force or
allow the discovery of the two real routers ,  put this in the seedfile,
without the hsrp records:
        xxx.xxx.xxx.201
      xxx.xxx.xxx.202
Stop netmon. 
Delete what was discovered incorrectly.
Restart netmon, and rediscover the two routers you
want.
After they are properly drawn on the IP Internet level
of the map, add the hsrp entry to the seedfile:
   %xxx.xxx.xxx.203
   xxx.xxx.xxx.203
The first entry says 'this is an hsrp address'.
The second entry says 'please discover this address'
Stop and start netmon so it re-reads the seedfile.

Now it should add the 203 iterface to one or the other
of the two real routers as an hsrp interface. There will be events in trapd.log
saying that an hsrp interface was added. It may take 5 or 10 minutes to
happen. The hsrp poll happens every 5 minutes.

Changes to the hsrp directives (%) (and also the snmp
directives, $) are only read at netmon startup.)

I usually only have to be this careful when discoverying
very large routers, especially when all interfaces, including hsrp interfaces,
resolve to different names. I think it is just a timing thing. Removing
those hsrp entries during initial discovery prevents netmon from erroneously
creating a node from an hsrp interface which it might have trouble merging
later on. 

Cordially,

Leslie A. Clark
IBM Global Services - Systems Mgmt & Networking
Detroit

Javier Morate Guerrero <jmorate@carrefour.com>
Sent by: owner-nv-l@lists.us.ibm.com

03/31/2005 11:42 AM

Please respond to
nv-l

To	nv-l@lists.us.ibm.com
cc
Subject	[nv-l] HSRP

      Hi,

      AIX 5.1.0.55.    NetView 7.1.4  FP
2

      I have a problem with HSRP.

      I have  two routers  (xxx.xxx.xxx.201 and
xxx.xxx.xxx.202) with HSRP
ip xxx.xxx.xxx.200.

      In the seedfile I have these entries:

      xxx.xxx.xxx.201
      $xxx.xxx.xxx.201
      xxx.xxx.xxx.202
      $xxx.xxx.xxx.202
      %xxx.xxx.xxx.200

      Only I want to have, in the map, the physical routers
(201 and 202)
and not the HSRP router (200).

      Is it possible?

       Un saludo,

Francisco Javier Morate Guerrero
Dpto. Gestión de Sistemas
Carrefour España
jmorate@carrefour.com