Foundry Networks Switch and Router User Manual

Configuring IP
December 2000 15 - 15
UDP broadcast
forwarding
The router can forward UDP broadcast packets for
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.
The router helps
forward broadcasts for
the following UDP
application protocols:
• bootps
• dns
• netbios-dgm
• netbios-ns
• tacacs
• tftp
• time
15-71
IP helper
address
The IP address of a UDP application server (such as
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.
None configured 15-72
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.
Table 15.2: IP Interface Parameters – Layer 3 Switches (Continued)
Parameter Description Default See page...

Foundry Networks Switch and Router Specifications

General

Brand	Foundry Networks
Model	Switch and Router
Category	Switch
Language	English