# Redundancy IOA

> IOA label | ES2-S1 REDUND IOA
> Number of IOA ports | 0
> Software release | First supported: 7.0.1
> Description | 10 W maximum Full-height module Provides redundancy for line modules Inserted in slot 0 and 11 only
> Capability | Provides switchover when a line module fails Provides N+1 redundancy for line modules When inserted in slot 0, provides redundancy for a failed line module in slots 1–5. When inserted in slot 11, provides redundancy for a failed line module in slots 12–16.
> Software features | See JunosE System Basics Configuration Guide, Chapter 6, Managing Modules.
> Model compatibility | E320 router E120 router
> Line module compatibility | ES2 4G LM ES2 10G UPLINK LM ES2 10G LM ES2 10G ADV LM
> SRP module compatibility | SRP-100 SRP-120 SRP-320
> Line module redundancy compatibility | Not applicable
> Port redundancy support | Not applicable
> Cables and connectors | Not applicable
> LEDs | OK (green)—Self-test passed FAIL (red)—Failure detected
> Alarms, errors, and events | See Monitoring Modules in JunosE System Basics Configuration Guide, Chapter 6, Managing Modules.