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Configuring IP Unicast Routing
Enabling IPv4 Unicast Routing
Enabling IPv4 Unicast Routing
By default, the switch is in Layer 2 switching mode and IP routing is disabled. To use the Layer 3 capabilities of the switch,
you must enable IP routing.
BEFORE YOU BEGIN
Review the Guidelines and Limitations, page 798.
DETAILED STEPS
Use the no ip routing global configuration command to disable routing.
EXAMPLE
This example shows how to enable IP routing using RIP as the routing protocol:
Switch# configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# ip routing
Switch(config)# router rip
Switch(config-router)# network 10.0.0.0
Command Purpose
show arp Display the entries in the ARP table.
show hosts Display the default domain name, style of lookup service, name server
hosts, and the cached list of hostnames and addresses.
show ip aliases Display IP addresses mapped to TCP ports (aliases).
show ip arp Display the IP ARP cache.
show ip interface [interface-id] Display the IP status of interfaces.
show ip irdp Display IRDP values.
show ip masks address Display the masks used for network addresses and the number of
subnets using each mask.
show ip redirects Display the address of a default gateway.
show ip route [address [mask]] |
[protocol]
Display the current state of the routing table.
show ip route summary Display the current state of the routing table in summary form.
Command Purpose
1. configure terminal Enter global configuration mode.
2. ip routing Enable IP routing.
3. router ip_routing_protocol Specify an IP routing protocol. This step might include other
commands, such as specifying the networks to route with
the network (RIP) router configuration command. For
information on specific protocols, see sections later in this
chapter.
4. end Return to privileged EXEC mode.
5. show running-config Verify your entries.
6. copy running-config startup-config (Optional) Save your entries in the configuration file.
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