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
To override default DHCP relay agent configuration settings:
1. (DHCPv4 and DHCPv6) Specify that you want to configure override options.
•
DHCPv4 overrides.
Global override:
[edit forwarding-options dhcp-relay]
user@host# edit overrides
Group-level override:
[edit forwarding-options dhcp-relay]
user@host# edit group group-name overrides
Per-interface override:
[edit forwarding-options dhcp-relay]
user@host# edit group group-name interface interface-name overrides
•
DHCPv6 overrides.
Global override:
[edit forwarding-options dhcp-relay dhcpv6]
user@host# edit overrides
Group-level override:
[edit forwarding-options dhcp-relay dhcpv6]
user@host# edit group group-name overrides
Per-interface override:
[edit forwarding-options dhcp-relay dhcpv6]
user@host# edit group group-name interface interface-name overrides
2. (DHCPv4 only) Enable DHCP relay proxy mode.
See “Enabling DHCP Relay Proxy Mode” on page 52.
3. (DHCPv4 only) Overwrite the giaddr in DHCP packets that the DHCP relay agent
forwards.
See “Changing the Gateway IP Address (giaddr) Field to the giaddr of the DHCP Relay
Agent” on page 72.
4. (DHCPv4 only) Replace the IP source address in DHCP relay request and release
packets with the gateway IP address (giaddr).
See “Replacing the DHCP Relay Request and Release Packet Source Address” on
page 72.
5. (DHCPv4 only) Override the DHCP relay agent information option (option 82) in DHCP
packets.
See “Overriding Option 82 Information” on page 71.
69Copyright © 2017, Juniper Networks, Inc.
Chapter 4: DHCP Relay Agent