Foundry Networks Switch and Router Installation And Configuration Manual page 457

Table 15.2: IP Interface Parameters – Layer 3 Switches (Continued)
Parameter Description
UDP broadcast The router can forward UDP broadcast packets for
forwarding UDP applications such as BootP. By forwarding the
UDP broadcasts, the router enables clients on one
sub-net to find servers attached to other sub-nets.
Note: To completely enable a client's UDP
application request to find a server on another sub-
net, you must configure an IP helper address
consisting of the server's IP address or the directed
broadcast address for the sub-net that contains the
server. See the next row.
IP helper The IP address of a UDP application server (such as
address a BootP or DHCP server) or a directed broadcast
address. IP helper addresses allow the router to
forward requests for certain UDP applications from a
client on one sub-net to a server on another sub-net.
a.Some devices have a factory default, such as 209.157.22.154, used for troubleshooting during installation.
For Layer 3 Switches, the address is on port 1 (or 1/1). NetIron Internet Backbone routers do not have a
default IP address.
December 2000
Configuring IP
Default See page...
The router helps 15-71
forward broadcasts for
the following UDP
application protocols:
• bootps
• dns
• netbios-dgm
• netbios-ns
• tacacs
• tftp
• time
None configured 15-72
15 - 15