Overriding Option 82 Information - Juniper EX3400 Features Manual

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Overriding Option 82 Information

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Documentation
Copyright © 2017, Juniper Networks, Inc.
(DHCPv4 and DHCPv6) Disable automatic binding of stray DHCP requests.
16.
See "Disabling Automatic Binding of Stray DHCP Requests" on page
(DHCPv4 and DHCPv6) Assign a single-session DHCP dual-stack group to a specified
17.
group of subscribers. You must assign the group to both legs of the DHCP dual stack.
See Configuring Single-Session DHCP Dual-Stack Support.
(Optional, DHCPv4 and DHCPv6l) Specify that a short lease be sent to the client.
18.
See Configuring DHCP Asymmetric Leasing.
Configuring Group-Specific DHCP Relay Options on page 92
Deleting DHCP Local Server and DHCP Relay Override Settings on page 30
You can configure the DHCP relay agent to add or remove the DHCP relay agent
information option (option 82) in DHCP packets.
This feature causes the DHCP relay agent to perform one of the following actions,
depending on the configuration:
If the DHCP relay agent is configured to add option 82 information to DHCP packets,
it clears the existing option 82 values from the DHCP packets and inserts the new
values before forwarding the packets to the DHCP server.
If the DHCP relay agent is not configured to add option 82 information to DHCP packets,
it clears the existing option 82 values from the packets, but does not add any new
values before forwarding the packets to the DHCP server.
To override the default option 82 information in DHCP packets destined for a DHCP
server:
Specify that you want to configure override options.
1.
[edit forwarding-options dhcp-relay]
user@host# edit overrides
Specify that the option 82 information in DHCP packets is overwritten.
2.
[edit forwarding-options dhcp-relay overrides]
user@host# set always-write-option-82
Extended DHCP Relay Agent Overview on page 46
Overriding the Default DHCP Relay Configuration Settings on page 68
Chapter 4: DHCP Relay Agent
59.
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