Dell Force10 E600i FTOS Version 8.4.1.5 Configuration Guide for ExaScale - Page 469
UDP Helper, Configuring UDP Helper, Important Points to Remember about UDP Helper
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To view if ICMP redirect messages are sent on the interface, use the show config command in the INTERFACE mode. If it is not listed in the show config command output, it is enabled. Only nondefault information is displayed in the show config command output. UDP Helper UDP helper allows you to direct the forwarding IP/UDP broadcast traffic by creating special broadcast addresses and rewriting the destination IP address of packets to match those addresses. Configurations using this feature are described in the section Configurations Using UDP Helper. Configuring UDP Helper Configuring FTOS to direct UDP broadcast is a two-step process: 1. Enabling UDP Helper. 2. Configuring a Broadcast Address. Important Points to Remember about UDP Helper • The existing command ip directed broadcast is rendered meaningless if UDP helper is enabled on the same interface. • The broadcast traffic rate should not exceed 200 packets per second when UDP helper is enabled. • You may specify a maximum of 16 UDP ports. • UDP helper is compatible with IP helper (ip helper-address): • UDP broadcast traffic with port number 67 or 68 are unicast to the DHCP server per the ip helper-address configuration whether or not the UDP port list contains those ports. • If the UDP port list contains ports 67 or 68, UDP broadcast traffic forwarded on those ports. IPv4 Addressing | 469
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