Specifications

Chapter 6. Managing the Router 153
Relaying BootP Requests
The DHCP relay list is an optional list of IP addresses of servers on the network. You create the list manually;
addresses are not automatically added or removed. You add addresses to the list using the command dhcp
addrelay (page 310) and remove addresses from the list using the command dhcp delrelay (page 313).
While the relay list contains at least one address, the DHCP server in the router is disabled, and the router
forwards all DHCP requests and BootP requests to all servers in the relay list. It forwards every reply received
from any of the servers in the relay list to the appropriate LAN.
If you remove all addresses from the DHCP relay list, the DHCP server is re-enabled and resumes processing
DHCP requests and also BootP requests if BootP processing is enabled.
Syslog Client
The router can act as a Syslog client, automatically sending system event messages to one or more Unix Syslog
servers. (For example, if you request an IP filter watch, the messages are sent to the Syslog servers; see ETH IP
FILTER, on page 237.) Messages generated by the router and sent to a Syslog server are sent to facility local0
with priority notice.
To send messages to Syslog servers, the router must know:
¥ The Syslog port number, and
¥ The IP address(es) of the Syslog servers.
To disable, re-enable, or redefine the Syslog port, use the command system syslogPort (page 227
).
The router can learn the IP addresses of Syslog servers in two ways:
¥ Via DHCP. The router can, under certain circumstances, send out a DHCP message and learn the IP
address(es) of Syslog servers. For more information, see DHCP Client Requests, on page 82.
¥ By explicit configuration. To configure the IP address of a Syslog server, use the command system
addSyslogServer (page 211).
You can limit the Syslog server addresses that the router learns through DHCP. To do so, set a filter for valid
Syslog server addresses using the command system addSyslogFilter (page 210).