Cisco Nexus 2248TP-E User Manual

Overview
This chapter provides an architectural overview of the Cisco Nexus 2000 Series Fabric Extender and includes
the following sections:
•
Information About the Cisco Nexus 2000 Series Fabric Extender, page 2
•
Fabric Extender Terminology, page 2
•
Fabric Interface Features , page 3
•
Host Interfaces, page 3
•
Host Interface Port Channels, page 4
•
VLANs, page 6
•
Protocol Offload, page 6
•
Quality of Service, page 6
•
Access Control Lists, page 6
•
IGMP Snooping, page 7
•
Switched Port Analyzer, page 7
•
Oversubscription, page 7
•
Management Model, page 8
•
Forwarding Model, page 9
•
Port Channel Fabric Interface Connection, page 10
•
Port Numbering Convention, page 10
•
Fabric Extender Image Management, page 11
•
Licensing Requirements for the Fabric Extender, page 11
•
Guidelines and Limitations for the Fabric Extender, page 11
•
Default Settings, page 19
Cisco Nexus 2000 Series NX-OS Fabric Extender Software Configuration Guide for Cisco Nexus 7000 Series
Switches, Release 5.2
1

Cisco Nexus 2248TP-E Specifications

General

Brand	Cisco
Model	Nexus 2248TP-E
Category	Extender
Language	English

Summary

Overview of Cisco Nexus Fabric Extenders

Information About the Cisco Nexus 2000 Series Fabric Extender

Provides an architectural overview of the Cisco Nexus 2000 Series Fabric Extender.

Fabric Extender Terminology

Defines key terms used in the document for Fabric Extenders and their components.

Fabric Interface Features

Details the features of FEX fabric interfaces, including SFP+ validation and link checks.

Host Interfaces

Describes Layer 3 and Layer 2 host interfaces on a Fabric Extender for server connectivity.

Host Interface Port Channels

Explains how to configure port channels for host interfaces on a Fabric Extender.

VLANs

Covers VLAN trunking and encapsulation support on the Fabric Extender.

Protocol Offload

Discusses offloading link-level protocol processing to the Fabric Extender CPU.

Quality of Service

Explains how the Fabric Extender uses QoS values and supports pause frames.

Access Control Lists

Details the support for ingress access control lists (ACLs) on the Fabric Extender.

IGMP Snooping

Describes IGMP snooping support on host interfaces for multicast traffic.

Switched Port Analyzer

Explains configuring host interfaces as SPAN source ports for monitoring traffic.

Oversubscription

Discusses the practice of oversubscription and its ratios for different FEX models.

Management Model

Outlines the zero-touch configuration model managed by the parent switch.

Forwarding Model

Explains that the FEX does not perform local switching; all traffic goes to the parent switch.

Port Channel Fabric Interface Connection

Describes configuring port channels for fabric interface connections for load balancing.

Port Numbering Convention

Details the port numbering convention used for Fabric Extender interfaces.

Fabric Extender Image Management

Explains that FEX software is bundled with the parent switch image and managed by it.

Licensing Requirements for the Fabric Extender

Lists the licensing requirements for the Cisco Nexus 2000 Series Fabric Extender.

Guidelines and Limitations for the Fabric Extender

Lists configuration guidelines and limitations for the Fabric Extender.

Default Settings

Lists the default parameter settings for the Fabric Extender.