Cisco HWIC-4ESW User Manual

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
Prerequisites for Installing Two Ethernet Switch Network Modules in a Single Chassis
3
Book Title
Prerequisites for Installing Two Ethernet Switch Network
Modules in a Single Chassis
A maximum of two Ethernet switch network modules can be installed in a single chassis. If two Ethernet
switch network modules of any type are installed in the same chassis, the following configuration
requirements must be met:
• Both Ethernet switch network modules must have an optional Gigabit Ethernet expansion board
installed.
• An Ethernet crossover cable must be connected to the two Ethernet switch network modules using
the optional Gigabit Ethernet expansion board ports.
• Intrachassis stacking for the optional Gigabit Ethernet expansion board ports must be configured.
For information about intrachassis stacking configuration, see the 16- and 36-Port Ethernet Switch
Module for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 series feature document.
Note Without this configuration and connection, duplications will occur in the VLAN databases, and
unexpected packet handling may occur.
Information About EtherSwitch HWICs
To configure the Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch HWICs, you should understand the
following concepts:
• VLANs, page 3
• Inline Power for Cisco IP Phones, page 4
• Layer 2 Ethernet Switching, page 4
• 802.1x Authentication, page 4
• Spanning Tree Protocol, page 4
• Cisco Discovery Protocol, page 4
• Switched Port Analyzer, page 4
• IGMP Snooping, page 4
• Storm Control, page 5
• Intrachassis Stacking, page 5
• Fallback Bridging, page 5
VLANs
For information on the concept of VLANs, refer to the material at this URL:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123newft/123t/123t_4/gt1636nm.ht
m#1047027

Cisco HWIC-4ESW Specifications

General

Brand	Cisco
Model	HWIC-4ESW
Category	Switch
Language	English