Routing Options

The following options all relate to routing. Except for defining the default route, everything related to routing is covered here. The default route is listed under "Basic Options."

option ip-forwarding 0 | 1 0 tells the client to disable IP forwarding, and 1 says to enable it.

option non-local-source-routing 0 | 1 0 tells the client to disable non-local source routing, and 1 says to enable it. 0 is more secure. Source routes are a potential security problem that can allow intruders to route data off of the local network.

option policy-filter address/mask Lists the only valid destination/mask pairs for incoming source routes. Any source-routed datagram whose next-hop address does not match one of the filters is discarded by the client.

option router-discovery 0 | 1 1 means the client should locate routers with the RFC 1256 Router Discovery mechanism, and 0 means it shouldn't. Because the DHCP server can provide the correct list of routers, router discovery is not commonly used on networks that have a DHCP server.

option router-solicitation-address address Defines the address to which the client should send RFC 1256 Router Discovery requests.

option static-routes destination gateway[,... ] Defines static routes for the client as a list of destination and gateway pairs.

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