Cabletron Systems CyberSWITCH CSX400 User Manual

Also see for CyberSWITCH HSIM-W6: Setup guide Configuration guide User guide Installation guide

Contents

IP Configuration ScreenLocal Management User’s Guide1-39The UDP Broadcast Redirector enables you to configure any Routing Services enabled device toforward the UDP packets that it receives as LAN broadcasts, directly to the appropriate server.UDP service requests that are sent as LAN broadcasts by clients of applications such as HostName, Domain Name, and Bootstrap servers, can be redirected to any server on any networksegment.To configure the UDP Broadcast Redirector, complete the following steps:1. Use the arrow keys to highlight the UDP Port option under System Level Setup.2. Enter the UDP port number of the UDP service request packets that you want to redirect (referto Table 1-4) and then press ENTER.3. Use the arrow keys to highlight the SAVE command field at the bottom of the screen and thenpress ENTER. The message “SAVED OK” displays.The entry for the UDP Port option reflects the UDP port number that is currently selected. Theentry for UDP Type names the UDP service to which that port number corresponds.Enabling Proxy ARP on a PortBy default, Proxy Address Resolution Protocol (ARP) is disabled on all ports, and IP RoutingServices respond only to ARP requests addressed to its own IP address.For one IP host to communicate with another IP host, knowledge of the target host’s MAC addressmust be known. To learn this MAC address, the IP host sends an ARP request packet as a LANbroadcast with the destination IP address of the target IP host. All hosts receive this broadcast andthe one host that matches the target IP address responds with its MAC-layer address.However, because each subnet constitutes a separate broadcast domain and LAN broadcasts arenot forwarded across routers, ARP does not work beyond a host’s local network or subnetwork.One of the primary purposes of a router is to confine LAN broadcast traffic to each local networkor subnetwork.NOTEYou can type in the UDP port number, or you can use the +REDIRECTOR- option atthe bottom of the screen to scroll through a list of commonly used UDP port numbers.To use the +REDIRECTOR- option, use the arrow keys to highlight the + (to goforward), or the - (to go backward), and then press the ENTER key to scroll in thedirection that you selected.