The following commands support TCP/IP routing. See Operating TCP/IP Software for information on how to use these commands.

NW TCPIP ROUTE Command

The NW TCPIP ROUTE command configures networks reachable through known routers. It enables you to configure routes that are more flexible, support resilient network topologies, and support VLSM or CIDR addressing and routing. Specific routes to remote hosts, subnets, networks, and supernets can be manually configured using the ROUTE ADD form of this command by supplying a destination and a next-hop router through which the destination can be reached.

For IPv4 networks, VLSM-addressed or CIDR-addressed routes can be configured by adding a destination with the optional mask or / (slash) notation followed by the network-prefix attribute.

For IPv6 networks, the IPv6 address autoconfiguration feature defaults to disabled. You can use the NW TCPIP ROUTE command to configure an IPv6 address on an interface. This initializes the IPv6 networking stacks and appropriate data structures for that interface.

IPv6 networks do not support the mask attribute and use the / notation followed by the network-prefix attribute. Destinations that are configured without the mask or / network-prefix attribute notation are treated as host-specific routes.

The ROUTE ADD form of the command can also be used to configure default routes. A default route is a route that is taken in the absence of a specific route (dynamically learned or manually configured) to a destination. Default routes can be assigned to specific VLSM or CIDR address aggregations (subnet/network/supernet) using the optional mask attribute (supported by IPv4 only) or “/” network-prefix attribute (supported by IPv4 and IPv6), and are referred to as assigned default routes. Default routes that are configured without the mask or “/” route-prefix attribute are treated as system default routes.

The ROUTE DELETE form of the ROUTE command enables you to manually delete specific static (manually configured) routes to remote hosts, subnets, networks, or supernets and default routes. Only inactive routes (those without open dialogs) can be deleted unless forced by using the optional "NOW" keyword.

NW TCPIP [TCPIP]IDENTITY Command

The NW TCPIP [TCPIP]IDENTITY (TCPIP ID) command enables an IPv4 network administrator to configure and delete multiple local IP addresses or address and mask pairs for each network interface. This extends MCP TCP/IP multihoming capabilities to support multiple logical networks. With IPv4 networks, you can also use this command to set the RIP Authentication type for each network interface.

For IPv6, the network administrator can use the NW TCPIP ID command to enable autoconfiguration and duplicate address detection. If autoconfiguration is enabled, IPv6 hosts are automatically configured when connected to a routed IPv6 network. This means that you can use the TCPIP ID command without specifying an IPv6 address.

If autoconfiguration is not enabled, IPv6 addresses must be assigned manually for communication to occur within an IPv6 network. Both a link-local address and any routed unicast addresses in which the interface will participate must be manually specified. If a link-local address is missing on an interface that is configured for IPv6, then a waiting entry is generated. For example:

2422/ 2750 75 :03 TCPIP/WARNING/TASK/ACCEPT/211/1/0
ACCEPT:No IPv6 link local address for interface on Network processor
211 Line 1 VLAN 0. *** ENTER: 'AX OK', OR DS
				

You can also specify the number of consecutive Neighbor Solicitation messages sent while performing duplicate address detection on a tentative address. This ensures that an address is not already in use by another interface before it is permanently assigned to an interface.

NW TCPIP RIP and NW TCPIP RIP RIPAUTHENTICATION Commands

The NW TCPIP RIP and NW TCPIP RIP RIPAUTHENTICATION (TCPIP RIP RIPAA) commands are supported only by IPv4.

The NW TCPIP RIP command provides current Routing Information Protocol (RIP) status and configuration information.

The NW TCPIP RIP RIPAA command sets the type of RIPv2 authentication that is in effect for a specified network processor and line. Network administrators can also inquire on the current authentication types set on each device and line configured on the system.

IPv6 uses dynamic route discovery to perform the same functions as RIP in IPv4. Dynamic route discovery gathers information learned from router advertisements in order to build a list of routers to which packets can be sent. If autoconfiguration is enabled, local addresses are parsed and built from the prefixes in the router advertisements.