Support Legacy pxGrid Clients
In ISE versions 2.3 and above there will be continued support for pxGrid 1.0(XMPP-based pxGrid clients). The below diagram details how the pxGrid server handles such clients in conjunction with new REST-WS clients:

Below is a comprehensive list of new and old services (and further APIs of some) and their support in ISE 2.3 and in ISE 2.4, please note the pxGrid 2.0 is officially supported in ISE 2.4
pxGrid Services and API Support
| ISE Service / API | XMPP Clients (legacy) | ISE 2.3 | ISE 2.4 |
|---|---|---|---|
| ANC Action Query | ✓ | ✓ | |
| Capability Query | ✓ | ✓ | |
| Core Service Subscribe | ✓ | ||
| Account Create | ✓ | ✓ | |
| Endpoint Profile Query | ✓ | ✓ | |
| Endpoint Profile Subscribe | ✓ | ||
| EPS Quarantine | ✓ | ||
| Generic Client | ✓ | ||
| Identity Group Download | ✓ | ✓ | |
| Identity Group Query | ✓ | ✓ | |
| Identity Group Subscribe | ✓ | ✓ | |
| MDM Client Query | ✓ | ||
| MDM Download | ✓ | ||
| MDM Subscribe | ✓ | ||
| Multi-Group Client | ✓ | ||
| Propose Capability | ✓ | ||
| Security Group Query | ✓ | ✓ | |
| Security Group Subscribe | ✓ | ✓ | |
| Session Download | ✓ | ✓ | |
| Session Query | ✓ | ✓ | |
| Session Query by IP | ✓ | ✓ | |
| Session Subscribe | ✓ | ✓ | |
| TrustSec Egress Policy Query | ✓ | ||
| TrustSec Policy Download Subscribe | ✓ | ||
| TrustSec SGACL Query | ✓ | ||
| System Health Query | ✓ | ||
| Radius Failure Subscribe | ✓ | ||
| Radius Failure Query By ID | ✓ | ||
| Radius Failure Query | ✓ | ||
| System Performance Query | ✓ |
*✓ to be fixed