Name: Juniper EX3400
Brand: Juniper
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[edit forwarding-options dhcp-relay relay-option-82]

user@host# set circuit-id

•

To insert the Agent Remote ID:

[edit forwarding-options dhcp-relay relay-option-82]

user@host# set remote-id

•

To insert both, configure both set commands.

3. (Optional) Configure a prefix that is used in the option 82 information in the DHCP

packets.

See “Including a Prefix in DHCP Options” on page 63.

4. (Optional) Configure the DHCP relay agent to include the interface’s textual description

instead of the interface identifier in the option 82 information.

See “Including a Textual Description in DHCP Options” on page 65.

Including a Prefix in DHCP Options

When you configure the DHCP relay agent to include DHCP options in the packets that

the relay agent sends to a DHCP server, you can specify that the relay agent add a prefix

to the DHCP option. You can add a prefix to the following DHCP options:

•

DHCPv4 option 82 Agent Circuit ID (suboption 1)

•

DHCPv4 option 82 Agent Remote ID (suboption 2)

•

DHCPv6 option 18 Relay Agent Interface-ID

•

DHCPv6 option 37 Relay Agent Remote-ID

The prefix is separated from the DHCP option information by a colon (:), and it can include

any combination of the host-name, logical-system-name, and routing-instance-name

options. The DHCP relay agent obtains the values for the host-name, logical-system-name,

and routing-instance-name as follows:

•

If you include the host-name option, the DHCP relay agent uses the hostname of the

device configured with the host-name statement at the [edit system] hierarchy level.

•

If you include the logical-system-name option, the DHCP relay agent uses the logical

system name configured with the logical-system statement at the [editlogical-system]

hierarchy level.

•

If you include the routing-instance-name option, the DHCP relay agent uses the routing

instance name configured with the routing-instance statement at the [edit

routing-instances] hierarchy level or at the [edit logical-system logical-system-name

routing-instances] hierarchy level.

If you include the hostname and either or both of the logical system name and the routing

instance name in the prefix, the hostname is followed by a forward slash (/). If you include

both the logical system name and the routing instance name in the prefix, these values

are separated by a semicolon (;).

Chapter 4: DHCP Relay Agent

Juniper EX3400 Specifications

General

Switch type	Managed
Switch layer	L2/L3
Quality of Service (QoS) support	Yes
Safety	UL-UL60950-1, C-UL CAN/CSA 22.2 No.60950-1, TUV/GS to EN 60950-1, CB-IEC60950-1, EN 60825-1
Form factor	1U
Product color	Black
Electromagnetic compatibility	FCC 47CFR 15 A, EN 55022 A, ICES-003 A, VCCI A, AS/NZS CISPR 22 A, CISPR 22 A, EN 55024, EN 300386, CE
SFP+ module slots quantity	4
QSFP+ module slots quantity	2
Installed SFP+ modules quantity	0
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	48
Memory type	DRAM
Noise level	35 dB
Flash memory	2000 MB
Processor frequency	1000 MHz
Virtual stacking (units)	10
Throughput	250 Mpps
Jumbo frames	9216
MAC address table	32000 entries
Number of VLANs	4093
Networking standards	IEEE 802.1D, IEEE 802.1Q, IEEE 802.1ab, IEEE 802.1p, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3ae, IEEE 802.3u, IEEE 802.3z
Virtual LAN features	Port-based VLAN
Copper ethernet cabling technology	10BASE-T, 100BASE-T, 1000BASE-T
Power consumption (max)	120 W
Number of power supply units	1
Operating altitude	0 - 3048 m
Non-operating altitude	3048 - 4877 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 45 °C
Storage relative humidity (H-H)	0 - 95 %
Operating relative humidity (H-H)	10 - 85 %
DHCP features	DHCP server, DHCP client
Authentication	MAC-based authentication, Port-based authentication
Security algorithms	802.1x RADIUS, HTTPS, SNMP, SSH-2
Fiber ethernet cabling technology	1000BASE-X