On this list? The Cisco IOS software provides the global configuration command What if Company XYZ needs to forward requests for a service not The ip helper-address command to define the address to which UDPīroadcasts for services should be forwarded.īy default, the ip helper-address command forwards the eight UDP To configure the helper address, identify the router interface that will Alternatively, the router canįorward these requests as directed broadcasts to a specific network or Helper-address command to relay broadcast requests for these key Userīy using the ip helper-address command, a router can be configured toĪccept a broadcast request for a UDP service and then forward it as a unicast toĪ specific IP address, as shown in Figure 2-21. Running services such as DHCP or DNS on severalĬomputers creates overhead and administrative problems, so the first option is Must provide DHCP and DNS servers on all subnets or use the Cisco IOS software

Some clients are unable to make aĬonnection without services such as DHCP. Such remoteĬlients broadcast to locate these servers, but routers, by default, do notįorward client broadcasts beyond their subnet. Network, clients might not reside on the same subnet as key servers. Need to broadcast to locate a TACACS security server. Other devices might use broadcasts to locate TFTP servers. This sectionĭescribes some of the purposes of and scenarios in which to use helperĭHCP is not the only critical service that uses broadcasts.

This section describes how networks and routers use helper addresses toįorward broadcasts to another server or router on another network.

Cisco tftp server commands