commands similar to the following to create demultiplexer table entries and a subnet
route that points to the static subscriber interface.
In the example, the host routes are associated with the primary IP interface on Gigabit
Ethernet 1/0. Because the host routes are statically configured with the subscriber
interface, there is no need for the router to install DHCP host routes. Therefore, in
step 7, the set dhcp relay inhibit-access-route-creation command is used to prevent
DHCP relay from installing host routes.
1.
Create a shared IP interface.
host1(config)#
interface ip ip53001
2.
Associate the shared IP interface with a static layer 2 interface.
host1(config-if)#
ip share-interface gigabitEthernet 1/0
3.
Make the shared interface an unnumbered interface.
host1(config-if)#
ip unnumbered loopback 53
4.
Specify the source addresses that the subscriber interface uses to demultiplex
traffic.
host1(config-if)#
ip source-prefix 10.10.10.0 255.255.255.252
5.
Exit Interface Configuration mode.
host1(config-if)#
exit
6.
Create a static route that sends traffic for destination address 10.10.10.0 to
subscriber interface ip53001.
host1(config)#
ip route 10.10.10.0 255.255.255.252 ip ip53001
7.
Prevent DHCP relay from installing host routes—this avoids a conflict that can
cause undesirable ARP behavior.
host1(config)#
set dhcp relay inhibit-access-route-creation
In the example, if you do not prevent DHCP relay from installing host routes, the
ARP spoof-checking mechanism associates the ARP traffic with the primary IP
interface (Gigabit Ethernet 1/0), although packets actually arrive on the subscriber
interface (ip53001), causing the router to detect a spoof and drop the packet.
Including Relay Agent Option Values in the PPPoE Remote Circuit ID
You can enable the router to capture and format a vendor-specific tag containing a
PPPoE remote circuit ID value transmitted from a digital subscriber line access
multiplexer (DSLAM) device. The router can then send this value to a Remote
Authentication Dial-In User Service (RADIUS) server or to a Layer 2 Tunneling Protocol
(L2TP) network server (LNS) to uniquely identify subscriber locations.
By default, the router formats the captured PPPoE remote circuit ID to include only
the agent-circuit-id suboption (suboption 1) of the DHCP relay agent information
Configuring DHCP Relay and BOOTP Relay
■
495
Chapter 20: Configuring DHCP Relay
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...