Juniper EX3400 Features Manual page 5

Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Copyright © 2017, Juniper Networks, Inc.
Suppressing DHCP Access, Access-Internal, and Destination Routes . . . . . . . . . . 81
Preventing DHCP from Installing Access, Access-Internal, and Destination Routes
by Default . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
DHCPv6 Relay Agent . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
DHCPv6 Relay Agent Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Inserting DHCPv6 Interface-ID Option (Option 18) In DHCPv6 Packets . . . . . . . . 86
Verifying and Managing DHCPv6 Relay Configuration . . . . . . . . . . . . . . . . . . . . . . 87
Configuring Groups of DHCP Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Grouping Interfaces with Common DHCP Configurations . . . . . . . . . . . . . . . . . . . 89
Guidelines for Configuring Interface Ranges for Groups of DHCP Interfaces . . . . 90
Configuring Group-Specific DHCP Local Server Options . . . . . . . . . . . . . . . . . . . . 91
Configuring Group-Specific DHCP Relay Options . . . . . . . . . . . . . . . . . . . . . . . . . 92
DHCP Liveness Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
DHCP Liveness Detection Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95
Configuring Detection of DHCP Local Server Client Connectivity . . . . . . . . . . . . . 96
Configuring Detection of DHCP Relay or DHCP Relay Proxy Client
Connectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Managing DHCP Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Using External AAA Authentication Services with DHCP . . . . . . . . . . . . . . . . . . . 101
Configuring Passwords for Usernames . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Creating Unique Usernames for DHCP Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Specifying the Maximum Number of DHCP Clients Per Interface . . . . . . . . . . . . 106
DHCP Local Server Handling of Client Information Request Messages . . . . . . . . 107
Enabling Processing of Client Information Requests . . . . . . . . . . . . . . . . . . . . . . 108
Forcing Dynamic Reconfiguration of Clients from a DHCP Local Server . . 111
Understanding Dynamic Reconfiguration of Extended DHCP Local Server
Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Default Client/Server Interaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Dynamic Client/Server Interaction for DHCPv4 . . . . . . . . . . . . . . . . . . . . . . . 112
Dynamic Client/Server Interaction for DHCPv6 . . . . . . . . . . . . . . . . . . . . . . . 112
Manually Forcing the Local Server to Initiate the Reconfiguration
Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Action Taken for Events That Occur During a Reconfiguration . . . . . . . . . . . . 113
Configuring Dynamic Client Reconfiguration of Extended Local Server
Clients . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Requesting DHCP Local Server to Initiate Reconfiguration of Client Bindings . . . 116
Configuring Dynamic Reconfiguration Attempts for DHCP Clients . . . . . . . . . . . . 117
Configuring Deletion of the Client When Dynamic Reconfiguration Fails . . . . . . . 118
Configuring Reconfiguration of the Client on Receipt of RADIUS-Initiated
Disconnect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
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