ip dhcp-external recreate-subscriber-interface
command from Global Configuration
mode.
When a bound DHCP client restarts the discovery process on a different primary IP
interface than the interface on which it initiated the original discovery process, the
DHCP external server application always deletes and re-creates the existing dynamic
subscriber interfaces for that client.
You must use the
ip dhcp-external recreate-subscriber-interface
command within
a specific virtual router context. Because you issue this command on a per-virtual
router basis, different virtual routers configured in the same router can use different
settings for this command.
In some lower-numbered JUNOSe software releases, the default behavior for the
DHCP external server was to delete and re-create the dynamic subscriber interface
after a bound client restarted the discovery process on its primary IP interface. If
you are upgrading the JUNOSe software on the router from one of these releases to
the current release, keep in mind that you must explicitly issue the
ip dhcp-external
recreate-subscriber-interface
command to continue to delete and re-create the
dynamic subscriber interface. The router no longer deletes and re-creates the dynamic
subscriber interface by default in this situation.
See
DHCP External Server
in the
Known Behavior
section of the
JUNOSe Release Notes
for a list of the JUNOSe releases in which deleting and re-creating the dynamic
subscriber interface was the default behavior for the DHCP external server.
Related Topics
Configuring DHCP External Server to Control Preservation of Dynamic Subscriber
Interfaces on page 526
■
■
ip dhcp-external recreate-subscriber-interface
DHCP External Server Identification of Clients with Duplicate MAC Addresses
Overview
You can configure the DHCP external server application to use a combination of the
media access control (MAC) address and the gateway IP address (giaddr) to uniquely
identify DHCP clients attached to the router. Using this feature enables you to manage
DHCP clients in network environments in which MAC addresses are not unique.
In some network environments where the DHCP external server application manages
DHCP clients from multiple DHCP relays, the same MAC address might be assigned
to more than one DHCP client. This can occur, for example, when network adapters
are manufactured with the same hardware address, resulting in duplicate MAC
addresses among the DHCP clients attached to the router.
To better manage DHCP clients in network environments with multiple DHCP relays
in which MAC addresses are not unique, you can configure the DHCP external server
application to use a combination of the MAC address and the giaddr to uniquely
identify the clients connected to the router. This setting for DHCP external server is
also referred to as
duplicate MAC mode
.
520
■
DHCP External Server Identification of Clients with Duplicate MAC Addresses Overview
JUNOSe 11.0.x Broadband Access Configuration Guide
Содержание JUNOSE 11.0.X MULTICAST ROUTING
Страница 6: ...vi...
Страница 28: ...xxviii Table of Contents JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 36: ...xxxvi List of Tables JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 42: ...2 Managing Remote Access JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 204: ...164 Managing RADIUS and TACACS JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 274: ...234 CLI Commands Used to Modify RADIUS Attributes JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 292: ...252 Monitoring RADIUS Relay Server JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 336: ...296 RADIUS Client Terminate Reasons JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 368: ...328 Managing L2TP JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 408: ...368 Configuring the Weighted Load Balancing Method JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 444: ...404 PPP Accounting Statistics JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 492: ...452 Monitoring Operational Status within the Current VR Context JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 494: ...454 Managing DHCP JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 510: ...470 DHCP Local Server Configuration Tasks JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 528: ...488 Configuring the Router to Work with the SRC Software JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 556: ...516 Configuring DHCP Relay Proxy JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 616: ...576 Managing the Subscriber Environment JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 632: ...592 Subscriber Management Configuration Examples JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 636: ...596 Monitoring Active IP Subscribers Created by Subscriber Management JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 672: ...632 Monitoring Active IP Subscribers Created by Subscriber Management JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 674: ...634 Managing Subscriber Services JUNOSe 11 0 x Broadband Access Configuration Guide...
Страница 767: ...Part 7 Index Index on page 729 Index 727...
Страница 768: ...728 Index JUNOSe 11 0 x Broadband Access Configuration Guide...