caqIpDownloadAceProtocolType 1.3.6.1.4.1.9.9.179.1.10.2.1.4

The protocol number field in the IP header used to indicate the higher layer protocol as specified in RFC 1700. A value value of 0 matches every IP packet. For example : 0 is IP, 1 is ICMP, 2 is IGMP, 4 is IP in IP encapsulation, 6 is TCP, 9 is IGRP, 17 is UDP, 47 is GRE, 50 is ESP, 51 is AH, 88 is IGRP, 89 is OSPF, 94 is KA9Q/NOS compatible IP over IP, 103 is PIMv2, 108 is PCP.