•
remote ID—Identifies the host. By default, the remote ID is the MAC address of the
switch. You can specify that the remote ID be the hostname of the switch, the interface
description, or a character string of your choice. You can also add an optional prefix to
the remote ID.
•
vendor ID—Identifies the vendor of the host. If you specify the
vendor-id
option but do
not enter a value, the default value
Juniper
is used. To specify a value, you type a
character string.
Configurations of the EX Series Switch That Support Option 82
Configurations of the EX Series switch that support option 82 are:
•
Switch and Clients Are on Same VLAN as DHCP Server on page 2842
•
Switch Acts as Relay Agent on page 2842
Switch and Clients Are on Same VLAN as DHCP Server
If the DHCP clients, the switch, and the DHCP server are all on the same VLAN, the switch
forwards the requests from the clients on untrusted access interfaces to the server on a
trusted interface. See Figure 66 on page 2842.
Figure 66: DHCP Clients, Switch, and DHCP Server Are All on Same VLAN
For the configuration shown in Figure 66 on page 2842, you set DHCP option 82 at the
[edit
ethernet-switching-options secure-access-port vlan]
hierarchy level.
Switch Acts as Relay Agent
The switch functions as a relay agent when the DHCP clients or the DHCP server is
connected to the switch through a Layer 3 interface. On the switch, these interfaces are
configured as routed VLAN interfaces, or RVIs. Figure 67 on page 2843 illustrates a scenario
Copyright © 2010, Juniper Networks, Inc.
2842
Complete Software Guide for Junos
®
OS for EX Series Ethernet Switches, Release 10.3
Summary of Contents for JUNOS OS 10.3 - SOFTWARE
Page 325: ...CHAPTER 17 Operational Mode Commands for System Setup 229 Copyright 2010 Juniper Networks Inc ...
Page 1323: ...CHAPTER 56 Operational Mode Commands for Interfaces 1227 Copyright 2010 Juniper Networks Inc ...
Page 2841: ...CHAPTER 86 Operational Commands for 802 1X 2745 Copyright 2010 Juniper Networks Inc ...
Page 3367: ...CHAPTER 113 Operational Mode Commands for CoS 3271 Copyright 2010 Juniper Networks Inc ...
Page 3435: ...CHAPTER 120 Operational Mode Commands for PoE 3339 Copyright 2010 Juniper Networks Inc ...
Page 3529: ...CHAPTER 126 Operational Mode Commands for MPLS 3433 Copyright 2010 Juniper Networks Inc ...