Juniper ACX1000 Configuration Manual page 10

ACX Series Universal Access Router Configuration Guide
Part 4
Chapter 10
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Understanding Timing Defects and Event Management on ACX Series . . . . . . . 301
Understanding SNMP MIB for Timing on ACX Series . . . . . . . . . . . . . . . . . . . . . . 303
Global Positioning System (GPS) and the ACX Series Routers . . . . . . . . . . . . . . 306
Integrated Global Navigation Satellite System (GNSS) on ACX500 Series
Routers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 307
Assisted Partial Timing Support on ACX500 Routers Overview . . . . . . . . . . . . . 308
Configuring DHCP on ACX Series Routers
Configuring DHCP Client and DHCP Server . . . . . . . . . . . . . . . . . . . . . . . . . . 313
Extended DHCP Local Server Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Interaction Among the DHCP Client, Extended DHCP Local Server, and
Address-Assignment Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 315
Minimal Configuration for Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 316
DHCP Local Server and Address-Assignment Pools . . . . . . . . . . . . . . . . . . . 316
Address-Assignment Pools Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 317
Configuring Address-Assignment Pools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 318
Configuring an Address-Assignment Pool Name and Addresses . . . . . . . . . . . . . 319
Configuring a Named Address Range for Dynamic Address Assignment . . . . . . 320
Configuring Static Address Assignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
DHCP Attributes for Address-Assignment Pools . . . . . . . . . . . . . . . . . . . . . . . . . . 321
Configuring How the Extended DHCP Local Server Determines Which
Address-Assignment Pool to Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Use of DHCP Option 50 to Request a Specific IP Address . . . . . . . . . . . . . . . . . . 324
Configuring DHCP Client-Specific Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Grouping Interfaces with Common DHCP Configurations . . . . . . . . . . . . . . . . . . 326
Guidelines for Configuring Interface Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Group-Specific DHCP Local Server Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328
Overriding Default DHCP Local Server Configuration Settings . . . . . . . . . . . . . . 329
Deleting DHCP Local Server Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
Specifying the Maximum Number of DHCP Clients Per Interface . . . . . . . . . . . . 331
Disabling ARP Table Population . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
DHCP Auto Logout Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
Auto Logout Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
How DHCP Identifies and Releases Clients . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Option 60 and Option 82 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
Automatically Logging Out DHCP Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335
DHCP Local Server Handling of Client Information Request Messages . . . . . . . 335
Enabling Processing of Client Information Requests . . . . . . . . . . . . . . . . . . . . . . 336
Subscriber Binding Retention During Interface Delete Events . . . . . . . . . . . . . . . 337
Configuring the Router to Maintain DHCP Subscribers During Interface Delete
Events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
Verifying and Managing the DHCP Maintain Subscribers Feature . . . . . . . . . . . . 339
Preserving Subscriber Binding Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
Configuring DHCP Local Server to Preserve Subscriber Binding Information . . . 340
Understanding Dynamic Reconfiguration of Extended DHCP Local Server
Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
Default Client/Server Interaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Dynamic Client/Server Interaction for DHCPv4 . . . . . . . . . . . . . . . . . . . . . . 342
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