[mrtg] Re: serial sub-interface

dmcdonald dmcdonald at mail.digicontech.com
Sun Jun 24 01:32:49 MEST 2001

>The problem is that graph of this Internet subinterface is giving full 
>utilization during off hours. Value drops down to zero after every two hours 
>but stays up for rest of the time. Now we do not have any Internet traffic 
>during off hours at all. Any ideas?

Are you sure you haven't been hacked?  Certain that nobody hasn't set up a quake server on your network?  It would be worth it to start netflow and at least figure out what ports are in use, or set up a time-based access-list and log to syslog all of the unexpected traffic, or maybe drop a sniffer in to watch...

>Second is that I am interested in monitoring voice on my 3640 particullary 
>the following:
>number of calls
Easiest done by using gw-accounting on the router and setting up radius to capture the calls.

>packet loss
Pretty hard to correlate this.  I don't think there are any stats on this kept...

>round trip delay
Again, hard to get.  You might be able to fire up NTP with 12.1.3T or later and query the NTP mib to get link latency times.

Errors are physical layer - pretty hard to correlate with a specific frame relay instance.  Grabing the errors from the Transport.ds1-mib might be the way to go, but they are not simple atomic counters, so they are a little hard to generate useful graphs.

>and bandwidth utilization per call
This will be in the radius record, along with the time, destination, and lots of other goodies.

>I requested cisco and they started asking me CCO login, contract number etc 
>which I do not have.

Running VOIP on Cisco without a SmartNet contract is a dangerous proposition.  The images that support all of the VOIP features are not on the GD Track, so you'll need to upgrade a number of times to get more stable code as it is released.  In order to get those upgrades you need a SmartNet contract.  You should talk to the reseller you purchased the gear from about getting a SmartNet contract.

Daniel J McDonald
Principal Network Specialist
Digicon Technologies

Pots: 1.512.708.8448x25
FAX:  1.512.708.849
e-mail: dmcdonald at digicontech.com

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