SNMP counter¶ This document explains the meaning of SNMP counters. General IPv4 counters¶ All layer 4 packets and ICMP packets will change these counters, but these counters won’t be changed by layer 2 packets (such as STP) or ARP packets. IpInReceives Defined in RFC1213 ipInReceives The number of packets received by the IP layer. It gets increasing at the beginning of ip_rcv function, always be u