Configuring DHCP Local Server to Support Creation of Dynamic Subscriber Interfaces
You can use the
ip dhcp-local auto-configure agent-circuit-identifier
command to
configure the DHCP local server to support the creation of dynamic subscriber
interfaces built over dynamic VLANs that are based on the agent-circuit-id option
(suboption 1) of the option 82 field in DHCP messages.
■
Use this command within a specific virtual router context.
■
This command requires that the user’s DHCP control traffic and data traffic
traverse the same client-facing ingress port on the E Series router.
The use of the option 82 field enables you to stack an IP interface that is associated
with a particular subscriber over a dynamically created VLAN; the VLAN is dynamically
created based on the agent-circuit-id option (suboption 1) that is contained in the
DHCP option 82 field.
For information about configuring agent-circuit-id–based dynamic VLAN subinterfaces,
see the
Configuring Dynamic Interfaces Using Bulk Configuration
chapter in
JUNOSe
Link Layer Configuration Guide
.
Differentiating Between Clients with the Same Client ID or Hardware Address
A JUNOSe software feature enables the DHCP local server to create unique client IDs
to support roaming clients and to manage situations in which two clients in the
network have the same hardware address.
NOTE:
This feature replaces the previous router behavior for DHCP local server client
roaming and duplicate address support. The
ip dhcp-local unique-client-ids
command replaces the
ip dhcp-local inhibit-roaming
command, which has been
removed from the CLI and has no effect on the DHCP local server.
You can configure the method DHCP local server uses when the router receives a
DISCOVER or REQUEST packet that contains a client ID or hardware address that
matches the ID or address of a currently bound client on another subnet or
subinterface.
In the default configuration, the DHCP local server uses the DHCP client’s subnet or
subinterface to differentiate duplicate clients and support client roaming. When a
new client, with a duplicate ID or hardware address, requests an address lease, DHCP
assigns that client a new address and lease—the existing client’s lease is unchanged.
The following table describes how the DHCP local server differentiates between a
new DHCP client with the same ID or hardware address as a currently bound DHCP
474
■
Configuring DHCP Local Server to Support Creation of Dynamic Subscriber Interfaces
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...