What is DHCP relay IP?
What is DHCP relay IP?
The DHCP relay agent is any TCP/IP host which is used to forward requests and replies between the DHCP server and client when the server is present on a different network. Relay agents receive DHCP messages and then generate a new DHCP message to send out on another INTERFACE.
What is DHCP and DHCP relay?
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 does IP DHCP smart relay do?
The DHCP smart relay feature allows the DHCP relay agent to use secondary IP addresses when the DHCP server does not reply the DHCP-OFFER message. The relay agent initially encapsulates its primary IP address to the giaddr field before forwarding a request to the DHCP server.
What is DHCP relay agent in router?
The router ,with DHCP relay agent feature enabled,replaces the source address with its own address and the destination IP address with DHCP server IP address i.e. the DHCP relay agent unicast the packet to DHCP server.
What is DHCPDISCOVER relay?
Dynamic Host Configuration Protocol (DHCP) relay is used to forward DHCP client’s broadcast request, DHCPDiscover, from one VLAN to the DHCP server’s VLAN. This request forwarding is done by the local router gateway of the DHCP client.
How do I override the IP DHCP relay information trust all?
Use the ip dhcp relay information trust-all command to override this behavior and accept the packets. This command is useful if there is a switch placed between the client and the relay agent that may insert option 82. Use this command to ensure that these packets do not get dropped.
How does the relay agent insert the ip helper address?
As part of this DHCP message, the relay agent inserts the IP address of the interface containing the ip helper-address command into the gateway IP address (giaddr) field of the DHCP packet. This IP address enables the DHCP server to determine which subnet should receive the offer and identify the appropriate IP address range to offer.
