For DHCP clients connected through the unnumbered interfaces, the DHCP relay agent automatically adds a static host route once the DHCP client obtains an address, specifying the unnumbered interface as the outbound interface. The Cisco IOS DHCP relay agent supports the use of unnumbered interfaces, including use of smart relay agent forwarding. The reply from the server is forwarded back to the client after removing option 82. The relay agent sets the gateway IP address (giaddr field of the DHCP packet) and, if configured, adds the relay agent information option (option82) in the packet and forwards it to the DHCP server. By contrast, relay agents receive DHCP messages and then generate a new DHCP message to send out on another interface.
Relay agent forwarding is distinct from the normal forwarding of an IP router, where IP datagrams are switched between networks rather transparently. Relay agents are used to forward requests and replies between clients and servers when they are not on the same physical subnet. When the clients and servers are not on the same physical subnet, the relay agents are used to forward requests and replies between them.Ī DHCP relay agent is any host that forwards DHCP packets between clients and servers. A DHCP relay agent is a host that forwards DHCP packets between clients and servers. Name that uniquely identifies the relay or snoop profile.Ĭonfigures a DHCP relay profile. Specifies a relay profile on an interface.Ĭonfigures a relay profile for the DHCP IPv4 component.Ĭonfigures a DHCP server to validate the relay agent information option in forwarded BOOTREPLY messages.Įnables the system to insert a DHCP relay agent information option in forwarded BOOTREQUEST messages to a DHCP server.Ĭonfigures the DHCP component to not drop BOOTREQUEST messages that have the relay information option set and the giaddr set to zero.Ĭonfigures how a relay agent processes BOOTREQUEST messages that already contain a relay information option. Enables Dynamic Host Configuration Protocol (DHCP) for IPv4 and enters DHCP IPv4 configuration mode.Ĭonfigures how a relay agent processes BOOTREQUEST messages that already contain a nonzero giaddr attribute.
0 kommentar(er)
