Related Documentation - Cisco 1601 - Router - EN Hardware Installation Manual

Hardware installation guide

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10/100BASE-T Ethernet Switch High-Speed WAN Interface Cards

Stacking of Cisco 10/100BASE-T Ethernet Switch HWICs

Stacking is the connection of two Ethernet switch HWICs resident in the same chassis so that they

behave as a single switch. Stacking is accomplished by daisy-chaining the two cards together with an

external RJ-45 crossover cable that is connected to the specified stacking port on each switch.

When a chassis is populated with two Ethernet switch HWICs, the user must configure the cards to

operate in stacked mode.

Note

There is no option to unstack two Ethernet switch HWICs. When two Ethernet switch HWICs are in the

same chassis, they can operate only in stacked mode. If you configure the cards to operate unstacked,

they will not operate correctly.

You must designate one port on each switch to be the stacking port. On the HWIC-4ESW card, this port

is nominally the first port (port 0), although any port can be chosen. On the HWIC-D-9ESW card, this

port is nominally the ninth port (port 8), although any port can be chosen. We recommend the use of port

8 as the stacking port, because it has been designed as an extra port on the HWIC-D-9ESW card and does

not provide inline power.

Only one port on an Ethernet switch HWIC can be configured as a stacking port.

Note

All combinations of Ethernet switch HWICs may be stacked: two HWIC-D-9ESW cards, an

HWIC-D-9ESW card with an HWIC-4ESW card, or two HWIC-4ESW cards.

See the Configuration Guidelines for HWIC-4ESW and HWIC-D-9ESW Interface Cards document for

information on how to configure stacking ports.

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