NV 7.1.3 FP 1 RH Linux 7.2

I have a lot of old Cisco 25xx routers in my network. There are plans to
replace these older devices this year but not until much later in the year.
I poll all of my routers via SNMP.  I see a lot of missed SNMP queries of
these routers. This causes NetView to report the router down when it is in
fact still reachable.  I was wondering if anyone on the list has
experienced this of has any suggestions on how to better monitor older
Cisco routers.

Thanks
Alan E. Hennis
Caterpillar Inc
Systems+Process Division
309.494.3308
hennis_alan_e AT cat DOT com