### JunosE 12.1.0 Release Notes

> ### Unsupported Features

> The JunosE Release 12.1.x documentation set describes some features that are present in the code but that have not yet been fully qualified by Juniper Networks. If you use any of these features before they have been fully qualified, it is your responsibility to ensure that the feature operates correctly in your targeted configuration.

> The following features are present but unsupported in this release.

> #### E120 Router and E320 Router

> - The ES2 10G LM and ES2 10G Uplink LM do not support layer 2 statistics for VLANs.
> - Subscriber Interfaces on the ES2 10G Uplink LM

> You can configure dynamic subscriber interfaces and static subscriber interfaces on the ES2 10G Uplink LM using the CLI. However, configuring subscriber interfaces on the ES2 10G Uplink LM provides no benefit because access features such as per-subscriber QoS are unavailable on the module.

> #### Policy Management

> - External Parent Groups Unsupported on ES2 10G, ES2 10G Uplink, and ES2 10G ADV LMs

> External parent groups are not supported on the ES2 10G, ES2 10G Uplink, and ES2 10G ADV LMs. If you create a policy that references an external parent group on these LMs, the system prevents you from attaching it to the LM interface and you receive an error message.

> #### Stateful SRP Switchover (High Availability)

> - Stateful SRP Switchover for Certain Applications

> The stateful SRP switchover feature has not been qualified for the following applications:

> Remote Access
> DHCP proxy client
> L2TP dialout

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