799
Configuring IP Unicast Routing
Configuring IP Addressing
— A switch virtual interface (SVI): a VLAN interface created by using the interface vlan vlan_id global configuration
command and by default a Layer 3 interface.
— An EtherChannel port channel in Layer 3 mode: a port-channel logical interface created by using the interface
port-channel port-channel-number global configuration command and binding the Ethernet interface into the
channel group.
The switch does not support tunnel interfaces for unicast routed traffic.
All Layer 3 interfaces on which routing will occur must have IP addresses assigned to them. See Assigning IP
Addresses to Network Interfaces, page 800.
A Layer 3 switch can have an IP address assigned to each routed port and SVI. The number of routed ports and SVIs
that you can configure is not limited by software. However, the interrelationship between this number and the number
and volume of features being implemented might have an impact on CPU utilization because of hardware limitations.
To support IPv4 routing, use the sdm prefer default global configuration command to set the Switch Database
Management (sdm) feature to balance resources. For more information on the SDM templates, see the sdm prefer
command in the command reference listed in the Related Documents, page 924.
Steps for Configuring Routing
Configuring IPv4 routing consists of several main procedures:
Configure Layer 3 interfaces.
Enable IPv4 routing on the switch.
Assign IPv4 addresses to the Layer 3 interfaces.
Enable selected routing protocols on the switch.
Configure routing protocol parameters (optional).
Configuring IP Addressing
IP routing requires that Layer 3 network interfaces are assigned IP addresses to enable the interfaces and to allow
communication with the hosts on interfaces that use IP. These sections describe how to configure various IP addressing
features. Assigning IP addresses to the interface is required; the other procedures are optional.
Default Addressing Configuration, page 800
Assigning IP Addresses to Network Interfaces, page 800
Configuring Address Resolution Methods, page 803
Routing Assistance When IP Routing is Disabled, page 807
Configuring Broadcast Packet Handling, page 810
Monitoring and Maintaining IP Addressing, page 815
To Next Page
Loading...
Need help?
General