[j-nsp] monitor interface rate

[Chris Kawchuk]

You can override the SNMP-reported "bandwidth" of an interface by the  
following:

interfaces {
     ge-1/3/0 {
         vlan-tagging;
         unit 101 {
             bandwidth 100m;
             vlan-id 101;
             family inet {
                 address x.x.x.x/x;
             }
         }

The "bandwidth" line is what will be reported as the SNMP interface  
bandwidth of say, a VLAN interface. Note the original interface is 1G,  
and all VLAns will also be reported as 1G. However, since I know this  
interface eventually connects to a 100M LAN switch, I can set it  
lower. Your SNMP manager will then read this during it's interface  
collection/sweep, and do the calculation to see if it exceeds some pre- 
defined threshold (50%, 70%, 90%) etc. Cacti does it (and can raise an  
alarm), network-weathermap does it (and email you), etc...

Commercially, I use Intermapper for this - does it out of the box: http://www.intermapper.com/

Regards,

- Chris.


On 13-Aug-09, at 7:06 AM, harbor235 wrote:

> To all,
>
> I would like to monitor a juniper router interface via snmp, simple  
> enough.
> However, I do not want bps, I want to monitor the interface as a  
> percentage
> of it's total capacity. In the end I want to be notified if my  
> interface
> exceeds 70%
> of capacity so I can initiate capacity management planning.
>
> I know I can on an interface by interface basis figure out 70% and  
> program
> that into
> each interface collection, however, that does not scale. Is there  
> anyone out
> there
> that knows of a MIB obect that does this?
>
> thanx,
>
> Mike
> _______________________________________________
> juniper-nsp mailing list juniper-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/juniper-nsp