![]() Choose Add a DHCP option to bring up additional fields. Several typical options are available in the Option field, or custom codes can be used for additional options. DHCP options - These can be used to provide additional information to clients, as desired by the administrator.Please note that forward slashes ("/") should be used in place of back slashes ("\"), otherwise Dashboard may report an "invalid path" error. Boot filename - The name of the file to load from the server and use to boot.Boot next-server - The address of the server to load the boot file from.Boot options - Used to provide necessary information to clients booting from TFTP.These servers are listed in the Custom nameservers box that will appear, with a single address per line. Specify nameservers. - Clients will be given a list of DNS servers configured by the administrator.Use Umbrella - Clients will be instructed to send DNS queries to Cisco Umbrella DNS Servers.Use Google Public DNS - Clients will be instructed to send DNS queries to Google's Public DNS servers.Proxy to upstream DNS - (MX only) The MX will provide clients with its LAN IP as the DNS server, then proxy any DNS queries to the server(s) it has been configured to use on its Internet port(s).These are used to resolve names (such as ) to IP addresses. DNS nameservers - Which addresses are provided to clients requesting DNS servers. ![]() Lease time - How long clients will have an address allocated to them, before the lease expires and the client must renew.This address must be in the same subnet as the clients. Gateway IP - (Only for Static routes) Indicates what default gateway IP address should be given to clients in this subnet.If set to 'Run a DHCP server', the following options will become available: If DHCP is still desired, another server must exist to handle the requests. This disables the DHCP service for this subnet. Do not respond to DHCP requests - The MX/MS will not process or forward DHCP messages on this subnet.Whichever server responds back first is where the communication will continue. Note: If there are multiple DHCP relay server IPs configured for a single subnet, the MX/MS will send the DHCP discover message to all servers. ![]() The DHCP server IP field will appear and is used to indicate where DHCP messages should be forwarded to.
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