Replacing IOAs on the E120 Router and the E320 Router

When you configure an IOA in an IOA bay on the E120 and E320 routers, the router stores the configuration in NVS.

When you replace an IOA that supports hot-swapping with the same type of IOA, the line module goes online immediately. When you replace an IOA that does not support hot-swapping with the same type of IOA, the line module reboots.

Before you install an IOA that was previously occupied by another IOA in the E120 router or the E320 router—for example, an ES2-S1 GE-4 IOA in an IOA bay that previously contained an ES2-S1 OC3-8 STM1 ATM IOA—consider whether the IOA that you are replacing supports hot-swapping. For example:

• When you replace an IOA that does not support hot-swapping, the line module reboots. Before installing the different type of IOA, issue the adapter erase or slot erase command for the slot that contains the IOA bay.
• When you replace an IOA that supports hot-swapping, the line module becomes inactive with a “ mismatch” state. After installing the different type of IOA, issue the adapter accept command or the slot erase command for the slot that contains the IOA bay.

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