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Home Documentation Junos OS Junos CLI Reference CLI Reference S

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{ "lLangCode": "en", "lName": "English", "lCountryCode": "us", "transcode": "en_US" }
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server-id-override

date_range 20-Nov-23
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Syntax

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server-id-override;

Hierarchy Level

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[edit forwarding-options dhcp-relay relay-option-82],
[edit forwarding-options dhcp-relay group group-name relay-option-82],
[edit logical-systems logical-system-name forwarding-options dhcp-relay relay-option-82],
[edit logical-systems logical-system-name forwarding-options dhcp-relay group group-name relay-option-82],
[edit logical-systems logical-system-name routing-instances routing-instance-name forwarding-options dhcp-relay relay-option-82],
[edit logical-systems logical-system-name routing-instances routing-instance-name forwarding-options dhcp-relay group group-name relay-option-82],
[edit routing-instances routing-instance-name forwarding-options dhcp-relay relay-option-82],
[edit routing-instances routing-instance-name forwarding-options dhcp-relay group group-name relay-option-82]

Description

Add the suboptions link-selection and server-id override to option-82 information for DHCP packets relayed to the server.

In network configurations where a firewall on the broadband network gateway (BNG) is between the DHCPv4 relay agent and the DHCP server, only the BNG loopback address passes through the BNG firewall. In that case, DHCP unicast packets do not pass through the firewall and and discarded. To enable DHCP unicast packets to pass through the BNG firewall, use the relay-source configuration statement to configure the DHCP relay agent to use the loopback address as the source address in IP headers and DHCP messages. In this case, this configuration statement adds the link-selection suboption to provide the DHCP server information to locate the correct address pool for the DHCP client and adds the server-id override suboption to set the server ID option.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 16.1.

Related Documentation

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