Configure an HWIC-4ESW / HWIC-D-9ESW Switch module on Cisco Router

In this post I covered the configuration procedure for the 4-port Cisco HWIC-4ESW and the 9-port Cisco HWIC-D-9ESW EtherSwitch high speed WAN interface cards (HWICs) and this module feature supported on Cisco 1800 (modular), Cisco 2800, and Cisco 3800 series integrated services Routers (ISR). The Cisco HWIC-4ESW / HWIC-D-9ESW are having 10/100BaseT Layer 2 Ethernet switching with Layer 3 Routing capability. Please follow the configuration steps bellow:

Limitations of EtherSwitch HWICs:

The following restrictions apply to the Cisco HWIC-4ESW and the Cisco HWIC-D-9ESW EtherSwitch HWICs.

No more than two Ethernet Switch HWICs or network modules may be installed in a host Router.

Multiple Ethernet Switch HWICs or network modules installed in a host Router will not act independently of each other. They must be stacked, otherwise they don’t work at all.

The ports of a Cisco EtherSwitch HWIC must NOT be connected to the Fast Ethernet/Gigabit onboard ports of the Router.

There is no inline power on the ninth port [port 8] of the HWIC-D-9ESW card.

There is no Auto MDIX support on the ninth port [port 8] of the HWIC-D-9ESW card when either speed or duplex is not set to auto.

There is no support for online insertion/removal (OIR) of the EtherSwitch HWICs.

When Ethernet Switches have been installed and configured in a host Router, OIR of the CompactFlash memory card in the router must not occur. OIR of the CompactFlash memory card will compromise the configuration of the Ethernet Switches.

VTP pruning is not supported.

There is a limit of 200 secure MAC addresses per module that can be supported by an EtherSwitch HWIC.


Step by step configuration / setup HWIC-4ESW: / HWIC-D-9ESW:

Adding VLAN instances:

A total of 15 VLANs are supported by an EtherSwitch HWIC. Beginning in privileged EXEC mode, follow these steps to configure a Fast Ethernet interface as Layer 2 access:

Router# vlan database

Router# vlan vlan_id

Router# exit

VTP Configuration:

Find the configuration commands for VLAN Trunking Protocol (VTP) on an EtherSwitch HWIC.

Router# vlan database

Router(vlan)# vtp server

Router(vlan)# vtp domain domain_name

Router(vlan)# vtp password password_value

Router(vlan)# exit

Configuring a Fast Ethernet Interface as a Layer 2 Trunk:

Beginning in global configuration mode, follow these steps to configure a Fast Ethernet interface as Layer 2 Trunk port on EtherSwitch HWIC.

Router(config)# interface fastethernet interface-id

Router(config-if)# switchport mode trunk

Router(config-if)# switchport trunk native vlan vlan-num

Router(config-if)# switchport trunk allowed vlan {add | except | none | remove}

vlan1[,vlan[,vlan[,…]]

Configuring a Fast Ethernet Interface as Layer 2 Access.

Beginning in global configuration mode, follow these steps to configure a Fast Ethernet interface as Layer 2 access port on EtherSwitch HWIC.

Router(config)#interface fastethernet interface-id

Router(config-if)#switchport mode access

Router(config-if)#switchport access vlan vlan_num

Router(config-if)#no shutdown

Router(config-if)#end

Other HWIC etherswitch modules are listed in de table bellow.

Product Number Description
HWIC-4ESW 4-port Cisco EtherSwitch 10BASE-T/100BASE-TX autosensing HWIC
HWIC-4ESW-POE* 4-port Cisco EtherSwitch 10BASE-T/100BASE-TX autosensing HWIC with power daughter card
HWIC-D-9ESW 9-port Cisco EtherSwitch 10BASE-T/100BASE-TX autosensing HWIC
HWIC-D-9ESW-POE* 9-port Cisco EtherSwitch 10BASE-T/100BASE-TX autosensing HWIC with power daughter cardW

*Additional power supply is needed.

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