Cisco N7K-C7010 Configuration Guide - Page 22
Port-Channel Interfaces, vPCs, Subinterfaces, VLAN Network Interfaces, Loopback Interfaces, Tunnel
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Information About Interfaces Chapter 1 Overview Send document comments to [email protected] Port-Channel Interfaces A port channel is a logical interface that is an aggregation of multiple physical interfaces. You can bundle up to 8 individual links to physical ports into a port channel to improve bandwidth and redundancy. You can also use port channeling to load balance traffic across these channeled physical interfaces. For more information about port-channel interfaces, see Chapter 6, "Configuring Port Channels." vPCs Virtual port channels (vPCs) allow links that are physically connected to two different Cisco Nexus 7000 series devices to appear as a single port channel by a third device. The third device can be a switch, server, or any other networking device. You can configure a total of 768 vPCs on each device. vPCs provide Layer 2 multipathing. For more information about vPCs, see Chapter 7, "Configuring vPCs." Subinterfaces You can create virtual subinterfaces on a parent interface configured as a Layer 3 interface. A parent interface can be a physical port or a port channel. Subinterfaces divide the parent interface into two or more virtual interfaces on which you can assign unique Layer 3 parameters such as IP addresses and dynamic routing protocols. For more information on subinterfaces, see the "Subinterfaces" section on page 4-2. VLAN Network Interfaces A VLAN network interface is a virtual routed interface that connects a VLAN on the device to the Layer 3 router engine on the same device. You can route across VLAN network interfaces to provide Layer 3 inter-VLAN routing. For more information on VLAN network interfaces, see the "VLAN Interfaces" section on page 4-3. Loopback Interfaces A virtual loopback interface is a virtual interface with a single endpoint that is always up. Any packet that is transmitted over a virtual loopback interface is immediately received by that interface. Loopback interfaces emulate a physical interface. For more information on subinterfaces, see the "Loopback Interfaces" section on page 4-4. Tunnel Interfaces Tunneling allows you to encapsulate arbitrary packets inside a transport protocol. This feature is implemented as a virtual interface to provide a simple interface for configuration. The tunnel interface provides the services necessary to implement any standard point-to-point encapsulation scheme. You can configure a separate tunnel for each link. For more information, see Chapter 8, "Configuring IP Tunnels." Cisco Nexus 7000 Series NX-OS Interfaces Configuration Guide, Release 5.x 1-4 OL-23435-03