Netgear XCM8806 Chassis Hardware Installation Guide - Page 862
enable icmp port-unreachables
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NETGEAR 8800 Chassis Switch CLI Manual Default Enabled. Usage Guidelines Enables the generation of an ICMP parameter-problem message (type 12) when the switch cannot properly process the IP header or IP option information. If a VLAN is not specified, the command applies to all IP interfaces. This command only affects the generation of certain ICMP packets. Filtering of ICMP packets usually forwarded by the switch is controlled by the access-list commands. Example The following command enables the generation of an ICMP parameter-problem message on VLAN accounting: enable icmp parameter-problem vlan accounting enable icmp port-unreachables enable icmp port-unreachables {vlan } Description Enables the generation of ICMP port unreachable messages on one or all VLANs. Syntax Description name Specifies a VLAN name. Default Enabled. Usage Guidelines Enables the generation of ICMP port unreachable messages (type 3, code 3) when a TCP or UDP request is made to the switch and no application is waiting for the request, or when an access policy denies the request. If a VLAN is not specified, the command applies to all IP interfaces. This command only affects the generation of certain ICMP packets. Filtering of ICMP packets usually forwarded by the switch is controlled by the access-list commands. Example The following command enables ICMP port unreachable messages on VLAN accounting: enable icmp port-unreachables vlan accounting 862 | Chapter 19. IP Unicast Commands