Before you configure a POS interface, verify that you have correctly installed the required module. For information about installing modules in ERX-7xx models, ERX-14xx models, and ERX-310 routers, see ERX Hardware Guide, Chapter 4, Installing Modules. For information about installing modules in the E120 router and the E320 router, see E120 and E320 Hardware Guide, Chapter 4, Installing Modules. Then verify that no ATM interfaces are defined on the physical port.
Also have the following information available:
For more information about specifying POS interfaces on E-series routers, see Interface Types and Specifiers.