HP Cisco MDS 9020 Cisco Nexus 5000 Series Command Reference Release 4.0(1a)N2( - Page 390
Distance Vector Multicast Routing Protocol, Protocol Independent Multicast
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permit (IPv4) Chapter 6 Security Commands Send comments to [email protected] precedence precedence (Optional) Specifies that the rule matches only packets that have an IP Precedence field with the value specified by the precedence argument. The precedence argument can be a number or a keyword as follows: • 0-7-Decimal equivalent of the 3 bits of the IP Precedence field. For example, if you specify 3, the rule matches only packets that have the following bits in the DSCP field: 011. • critical-Precedence 5 (101) • flash-Precedence 3 (011) • flash-override-Precedence 4 (100) • immediate-Precedence 2 (010) • internet-Precedence 6 (110) • network-Precedence 7 (111) • priority-Precedence 1 (001) • routine-Precedence 0 (000) fragments (Optional) Specifies that the rule matches only those packets that are noninitial fragments. You cannot specify this keyword in the same rule that you specify Layer 4 options, such as a TCP port number, because the information that the switch requires to evaluate those options is contained only in initial fragments. log (Optional) Specifies that the switch generates an informational logging message about each packet that matches the rule. The message includes the following information: • ACL name • Whether the packet was permitted or denied • Whether the protocol was TCP, UDP, ICMP or a number time-range time-range-name • Source and destination addresses and, if applicable, source and destination port numbers (Optional) Specifies the time range that applies to this rule. You can configure a time range by using the time-range command. icmp-message (Optional; IGMP only) Rule matches only packets of the specified ICMP message type. This argument can be an integer from 0 to 255 or one of the keywords listed under "ICMP Message Types" in the "Usage Guidelines" section. igmp-message (Optional; IGMP only) Rule matches only packets of the specified IGMP message type. The igmp-message argument can be the IGMP message number, which is an integer from 0 to 15. It can also be one of the following keywords: • dvmrp-Distance Vector Multicast Routing Protocol • host-query-Host query • host-report-Host report • pim-Protocol Independent Multicast • trace-Multicast trace 6-56 Cisco Nexus 5000 Series Command Reference OL-16599-01