User`s guide

296 XSR User’s Guide
Features Chapter 12
Configuring DHCP
Features
The XSR offers the DHCP features:
 Persistent storage/database of network values for network clients.
 Persistent storage of network client lease states kept across reboot.
 Temporary or permanent network (IP) address allocation to clients.
 Network configuration parameter assignment to clients.
 Provisioning of differentiated network values by Client Class
 Persistent and user-controllable conflict avoidance to prevent
duplicate IP address including configurable ping checking.
 Visibility of DHCP network activity and leases through operator
reports statistics and logs.
 Nested scopes
DHCP Server Standards
The XSR supports the following:
 DHCP Server as defined in RFC-2131, BOOTP Server and BOOTP
Relay as defined in RFC-951/RFC-1542, and BOOTP Client as defined
in RFC-1534: Interoperation Between DHCP and BOOTP (static BOOTP
only)
 DHCP Server also supports RFC-2132: DHCP Options and BOOTP
Vendor Extensions and RFC-3004: User Class Option for DHCP.
 DHCP Server and DHCP/BOOTP Relay services run on FastEthernet
ports only.
NOTE
If either DHCP/BOOTP Relay (using the ip helper-address command)
or DHCP Server is enabled on one FastEthernet port, you cannot also
configure the other service on the second FastEthernet port. The
XSR permits either one or the other service to operate, not both.