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# Platform Considerations

High availability is supported on all E-series routers except for the ERX-310 router.

For information about the modules supported on E-series routers:

- See the ERX Module Guide for modules supported on ERX-7xx models and ERX-14xx models.
- See the E120 and E320 Module Guide for modules supported on the E120 router and the E320 router.

## Module Requirements

The following table lists which SRPs support or do not support the high availability mode (stateful SRP switchover) feature.

SRP Model | Supported
--- | ---
SRP-5G | No
SRP-5G+ | Yes
SRP-10G | Yes
SRP-40G | No
SRP-40G PLUS | Yes
SRP-100 | Yes

| Note: High availability requires two SRP modules with 1 GB of memory or more.

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