[j-nsp] snmp count for arp policer?

[Clarke Morledge]

On an IP interface (on a router like the MX), you can configure filters to 
count different types of IP packets.  But there does not appear to be a 
way to count ARP packets, since they do not have an IP header.

I would like to be able to have some type of ARP packet counter per 
interface that I can query with SNMP, just like you would with the IP 
counters via filters that can be programmed into the router hardware.

The closest thing I can find that might do it is using an ARP policer. 
Unfortunately, this will only catch packets that hit some limit on your 
policer.   This is better than nothing, but not great.   From the CLI, you 
can look at the number of hits on the __default_arp_policer__, which I 
assume will get superceded by any interface specific ARP policer.  In this 
context, the "show policer" output via the CLI is helpful:

> show policer
Policers:
Name                                                Bytes 
Packets
__default_arp_policer__                       22143436345 
330586727

But I do not know how to collect this information via SNMP.

Does anyone have any clues on how to do this, aside from scripting it out 
via junoscript and the utility mib?


Clarke Morledge
College of William and Mary
Information Technology - Network Engineering
Jones Hall (Room 18)
Williamsburg VA 23187