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What does a DHCP relay agent do?
A DHCP relay agent is any host that forwards DHCP packets between clients and servers. Relay agents are used to forward requests and replies between clients and servers when they are not on the same physical subnet.
What is DHCP server binding?
The DHCP Bindings page displays the statistics of the DHCP client information such as IP address, MAC address, Lease Expire Time and Type of Binding (static or dynamic). MAC Address — The MAC address of the clients’ assigned IP address. Lease Expires — Lease time for the client’s system.
Why would a DHCP relay be needed?
A DHCP relay agent is a host or router that forwards DHCP packets between clients and servers. Network administrators can use the DHCP Relay service of the SD-WAN appliances to relay requests and replies between local DHCP Clients and a remote DHCP Server.
What is DHCP decline message?
A DHCP Decline message is sent by a DHCP client to notify the DHCP server that the assigned IP address conflicts with another IP address. A DHCP Release message is sent by a DHCP client to release its IP address. After receiving a DHCP Release message, the DHCP server can assign this IP address to another DHCP client.
What is DHCP binding in router?
A DHCP binding is a mapping of the IP addresses to the Media Access Control (MAC) addresses of the device that are found in the DHCP server database. The bindings are saved as records for easy maintenance.
What are the four types of messages used in DHCP?
Option 53 defines DHCP message types, including the DHCPDISCOVER, DHCPOFFER, DHCPREQUEST, DHCPACK, DHCPNAK, DHCPDECLINE, DHCPRELEASE, and DHCPINFORM messages.
What is the function of a DHCP relay agent?
The DHCP relay agent operates as the interface between DHCP clients and the server. The DHCP Relay Agent relays DHCP messages between DHCP clients and DHCP servers on different IP networks. For more information, read this topic.
How to clear the DHCP client binding information?
To clear the DHCP client binding information configured on a given interface and set the binding information again, use the clear dhcp ipv4 client command in XR EXEC mode. Specifies DHCP IPv4 client enabled interface name. Specifies DHCP IPv4 client enabled interface number. Release 6.0.1 This command was introduced.
How many IPv6 address does a DHCP relay need?
Thereby, the DHCPv6 relay agent acts as a stateful relay agents and maintains DHCPv6 binding and respective route entry for the allocated IPv6 addresses. You can configure up to 500 client sessions over a BVI interface for DHCP relay. Each DHCPv6 relay profile can be configured with upto 8 DHCPv6 server addresses.
Which is the helper address for DHCP server?
The helper-address command in DHCP relay profile submode will only support global unicast IP address as the helper address. Only interface-id and remote-id DHCP option code are added by a relay agent while forwarding the packet to a DHCP server. Configuring DHCP option code is not supported in DHCP relay profile submode.