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## Related Documentation

- Stateful Line Module Switchover Overview
- System Operations When Stateful Line Module Switchover Is Enabled
- Replacement of Line Modules When Stateful Line Module Switchover Is Enabled
- Application Support for Stateful Line Module Switchover

# Stateful Line Module Switchover Platform Considerations

Stateful line module switchover is supported on all E120 and E320 routers that contain ES2 4G line modules installed with the ES2-ES1 Service IOA. See the E120 and E320 Module Guide for modules supported on the E120 and E320 Broadband Services Routers.

Table 1 lists the line module, SRP module, and IOA slot combinations that support stateful switchover of line modules and stateful switchover for LNS sessions, when the router operates as an LNS device on one side of an L2TP tunnel.

Table 1: Module Configurations Supported for Stateful Switchover of LNS Sessions

Router Model | SRP and SFM Model | Number of L2TP tunnels and sessions | Number of Active and Standby ES2-ES1 Service IOAs | Downlink and Uplink LMs | Support for Stateful Switchover of LNS Sessions
--- | --- | --- | --- | --- | ---
E320 | SRP-100 | 16,000 tunnels and 16,000 sessions | 2 Service IOAs (1 active and 1 standby) | ES2 4G LM and GE-4 IOA | Supported
E320 | SRP-100 | 16,000 tunnels and 32,000 sessions | 4 Service IOAs (2 active and 2 standby) | ES2 4G LM and GE-4 IOA | Supported
E320 | SRP-320 | 32,000 tunnels and 32,000 sessions | 4 Service IOAs (2 active and 2 standby) | ES2 4G LM and GE-4 IOA | Supported
E120 | SRP-320 | 16,000 tunnels and 16,000 sessions | 2 Service IOAs (1 active and 1 standby) | ES2 10G LM and GE-8 IOA | Not supported
E120 | SRP-320 | 32,000 tunnels and 32,000 sessions | 4 Service IOAs (2 active and 2 standby) | ES2 10G LM and GE-8 IOA | Not supported
E120 | SRP-320 | 16,000 tunnels and 16,000 sessions | 2 Service IOAs (1 active and 1 standby) | ES2 4G LM and GE-8 IOA | Supported
E120 | SRP-320 | 32,000 tunnels and 32,000 sessions | 4 Service IOAs (2 active and 2 standby) | ES2 4G LM and GE-8 IOA | Supported

## Related Documentation

- Stateful Line Module Switchover Overview
- System Operations When Stateful Line Module Switchover Is Enabled
- Replacement of Line Modules When Stateful Line Module Switchover Is Enabled
- Application Support for Stateful Line Module Switchover

#### Published: 2010-12-29

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