Dhcp Local Server Handling Of Client Information Request Messages - Juniper EX3400 Features Manual

Related
Documentation

DHCP Local Server Handling of Client Information Request Messages

Copyright © 2017, Juniper Networks, Inc.
[edit system services dhcp-local-server overrides]
user@host# set interface-client-limit
NOTE: For DHCP local server and DHCP relay agent, you can use either the
interface-client-limit
statement to set a limit of one client per interface. The
statement with a value of 1 retains the existing client and rejects any new
client connections. The
deletes the existing client and allows a new client to connect.
Overriding Default DHCP Local Server Configuration Settings on page 28
Allowing Only One DHCP Client Per Interface
Deleting DHCP Local Server and DHCP Relay Override Settings on page 30
Extended DHCP Local Server Overview on page 22
Extended DHCP Relay Agent Overview on page 46
DHCP clients that already have externally provided addresses may solicit further
configuration information from a DHCP server by sending a DHCP information request
that indicates what information is desired. By default, DHCP local server and DHCPv6
local server ignore any DHCP information requests that they receive. You can override
this default behavior to enable processing of these messages.
If you enable processing of information requests, DHCP local server responds to the client
with a DHCP acknowledgment message that includes the requested information—if it
is available. DHCPv6 local server responds in the same manner but uses a DHCP reply
message. No subscriber management or DHCP-management is applied as a result of
the DHCP information request message.
By default, DHCP relay and DHCP relay proxy automatically forward DHCP information
request messages without modification if the messages are received on an interface
configured for a DHCP server group. DHCP relay and relay proxy drop information request
messages received on any other interfaces. You cannot disable this default DHCP relay
and relay proxy behavior.
The information requested by these clients has typically been configured with the
statement for an address pool defined by the
dhcp-attributes
statement at the
pool-name
When you enable processing of DHCP information requests, you can optionally specify
the name of the pool from which the local server retrieves the requested configuration
information for the client. If you do not do specify a local pool, then the local server
requests that AAA selects and returns only the name of the relevant pool.
number
statement or the
client-discover-match incoming-interface
client-discover-match incoming-interface
hierarchy level.
[edit access]
Chapter 8: Managing DHCP Clients
interface-client-limit
statement
address-assignment pool
107