Juniper EX3400 Features Manual
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Brand: Juniper
Category: Network Router , Switch
Type: Features manual
Model: Juniper EX2300 , Juniper EX4300 , Juniper EX3400
Pages: 476
You can change DHCP client configurations from the switch, using client identifiers to
indicate which clients you want to configure.
To configure a DHCP client, you configure an interface to belong to the DHCP family and
specify additional attributes, as desired:
[edit]
user@switch# set interfaces interface-name unit number family inet dhcp
configuration-statement
The options that you can configure are listed in Table 6 on page 18. Replace the variable
configuration-statement with one or more of the statements listed in this table. If you do
not explicitly configure these options, the switch uses default values for them.
Table 6: DHCP Client Settings
DescriptionConfiguration Statement
Unique client ID—By default this consists of the hardware type (01 for Ethernet)
and the MAC address (a.b.c.d). For this example, the value would be 01abcd.
client-identifier
Time in seconds that a client holds the lease for an IP address assigned by a DHCP
server. If a client does not request a specific lease time, then the server sends the
default lease time. The default lease time on a Junos OS DHCP server is 1 day.
lease-time
Number of times the client attempts to retransmit a DHCP packet.retransmission-attempt
Time between transmission attempts.retransmission-interval
IP address of the server that the client queries for an IP address.server-address
TCP/IP settings learned from an external DHCP server to the DHCP server running
on the switch are propagated.
update-server
Vendor class ID (CPU's manufacturer ID string) for the DHCP client.vendor-option
Related
Documentation
Configuring a DHCP Server on Switches (CLI Procedure)•
• Understanding DHCP Services for Switches on page 3
Configuring a DHCP SIP Server (CLI Procedure)
You can use the sip-server statement on the EX Series switch to configure option 120 on
a DHCP server. The DHCP server sends configured option values—Session Initiation
Protocol (SIP) server addresses or names—to DHCP clients when they request them.
Previously, you were only allowed to specify a SIP server by address using [edit system
services dhcp option 120]. You specify either an IPv4 address or a fully qualified domain
name to be used by SIP clients to locate a SIP server. You cannot specify both an address
and name in the same statement.
To configure a SIP server using the address option:
Copyright © 2017, Juniper Networks, Inc.18
DHCP and Other System Services Feature Guide for EX2300, EX3400, and EX4300 Switches