Enabling Ip Unicast Routing - Cisco Catalyst 3750 Software Configuration Manual

Chapter 28 Configuring IP Unicast Routing
Table 28-3 Commands to Display Caches, Tables, and Databases
Command
show arp
show hosts
show ip aliases
show ip arp
show ip interface [interface-id]
show ip irdp
show ip masks address
show ip redirects
show ip route [address [mask]] | [protocol]
show ip route summary

Enabling IP 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.
Beginning in privileged EXEC mode, follow these steps to enable IP routing:
Command
Step 1
configure terminal
Step 2 ip routing
Step 3
router ip_routing_protocol
Step 4 end
Step 5
show running-config
Step 6
copy running-config startup-config
Use the no ip routing global configuration command to disable routing.
This example shows how to enable IP routing using RIP as the routing protocol:
Switch# configure terminal
Enter configuration commands, one per line.
Switch(config)# ip routing
Switch(config)# router rip
Switch(config-router)# network 10.0.0.0
Switch(config-router)# end
78-15870-01
Purpose
Display the entries in the ARP table.
Display the default domain name, style of lookup service, name server hosts,
and the cached list of host names and addresses.
Display IP addresses mapped to TCP ports (aliases).
Display the IP ARP cache.
Display the IP status of interfaces.
Display IRDP values.
Display the masks used for network addresses and the number of subnets
using each mask.
Display the address of a default gateway.
Display the current state of the routing table.
Display the current state of the routing table in summary form.
Purpose
Enter global configuration mode.
Enable IP routing.
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, refer to sections later in this chapter and to the
Cisco IOS IP and IP Routing Configuration Guide for Release 12.1.
Return to privileged EXEC mode.
Verify your entries.
(Optional) Save your entries in the configuration file.
Catalyst 3750 Metro Switch Software Configuration Guide
Enabling IP Unicast Routing
End with CNTL/Z.
28-17