Cisco HWIC-4ESW
This card is often used to add more port to your Cisco router through sub-interfaces. This can add two fastethernet 10/100 ports configured in this way.
This card offers Layer 2 switching and Layer 3 routing capabilities in one module.
Compatible with:
1841, 2811, 2801, 2821, 2851, 3825, 1921, 1941, 2901, 2911, 2921, 2951, 3925, 3945