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
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