We do a similar thing for Aruba, it was getting a little slow poking
the controller for each AP separately. So instead, we do an snmp
walk for a few interesting OIDs every minute to get the details for
everything, and stick them in the database. Then the probe just
looks in the database for the information, and cross references with
our (home-grown) NAC system, and updates the details in the probe to
show connections, usernames, locations, SNR, radio type, etc..
We're relatively small, only 300 APs (well, small compared to
Debbie's > 2000 APs anyway). But still, poking at the controller to
get all the stats I wanted for each AP, with a 1 minute poll interval
seemed to have a long (~2-4 seconds) response time sometimes.
Now that IM has a database you can sort of get to, it might be a bit
easier to integrate the probe. I have not revisited my scripts to
see how to put them into a newer separate-database driven IM.
Just wanted to give some ideas on how it could be done.
- - - Jon Myers
(Top post to leave bottom part for reference only)
At 01:41 PM 4/7/2010, Debbie Fligor wrote:
We do have Meru and we do monitor it. However, we found that the
controllers were not very responsive to SNMP, and we wanted to
summarize by building (we have > 2000 APs in ~ 230 buildings). so
we run a script on a unix system that talks SNMP to the controller
and generates a per-building summary (into a database these days,
IIRC), that has about a 5 minute history built in (to deal with the
SNMP failures). We also have a daemon listening on a socket that can
query the database. A simple TCP probe on Intermapper gets
up/down/warn status by asking for a specific building number and
getting back the number of down APs and total APs for that building
number. Since we name our access points wap-####-xx where #### is
the building number (and xx is sequence number), this isn't too hard to do.
If this complex type of monitoring is of interest, I'll see about
sharing our scripts, we can usually do that.
On Apr 7, 2010, at 10:44, <[email protected]> wrote:
> Does anyone use InterMapper to poke Meru wireless controllers? I
would not want to reinvent the wheel. If not, I'll start writing
one (the probe :), not the wheel) and share it out.
>
> Andrey
>
>
> --------------
> Andrey Khomyakov | Senior Network Engineer | +1.617.879.5945
>
>
-----
-debbie
Debbie Fligor, n9dn Network Engineer, CITES, Univ. of Il
email: [email protected] <http://www.uiuc.edu/ph/www/fligor>
"My turn." -River Tam
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