Cisco Cisco IOS Software Release 12.4(15)T
Protected Port on EtherSwitch HWICs on Modular Integrated Services Routers
Prerequisites for Protected Port on EtherSwitch HWICs on Modular Integrated Services Routers
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Cisco IOS Release 12.4(15)T
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Prerequisites for Protected Port on EtherSwitch HWICs on
Modular Integrated Services Routers
Modular Integrated Services Routers
The following Integrated Services Routers (ISRs) support the protected port feature:
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Cisco 1841ISR
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Cisco 2800 series ISRs, including models 2801, 2811, 2821, and 2851
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Cisco 3800 series ISRs, including models 3825 and 3845
To support the protected port feature, the Cisco routers listed above must be equipped with one of the
following HWICs:
following HWICs:
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HWIC-4ESW
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HWIC-D-9ESW
Restrictions for Protected Port on EtherSwitch HWICs on
Modular Integrated Services Routers
Modular Integrated Services Routers
The protected port feature can be configured only on the switch ports attached to the specified HWICs
installed in a supported Cisco ISR.
installed in a supported Cisco ISR.
Information About Protected Port on EtherSwitch HWICs on
Modular Integrated Services Routers
Modular Integrated Services Routers
Before configuring the protected port feature on a router, you should understand the following concept:
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How the Protected Port Feature Works
Some applications require that no traffic is forwarded between ports on the same switch so that one
neighbor does not see the traffic generated by another neighbor. In such an environment, the use of
protected ports ensures that there is no exchange of unicast, broadcast, or multicast traffic between these
ports on the switch.
neighbor does not see the traffic generated by another neighbor. In such an environment, the use of
protected ports ensures that there is no exchange of unicast, broadcast, or multicast traffic between these
ports on the switch.