i have to moniter the TUNNEL of my 1700 series router (1721). for that i need SNMP get method of monitering. but i don't know the OID value which is require for this test. i have the value of 3700 series router which is "1.3.6.1.2.1.2.2.1.8.12" . plz tell me the OID value of CISCO 1700 series router !