Split Horizon group per service is only supported on the 7210 SAS-K 2F1C2T, 7210 SAS-K 2F6C4T, and 7210 SAS-K 3SFP+ 8C.
Port-based split horizon groups are only supported on the 7210 SAS-D and 7210 SAS-Dxp.
In many applications, the split-horizon group concept involving a group of SAPs is useful to prevent direct customer-to-customer traffic exchange (without the traffic being sent to the head-end service nodes). This extension is referred to as a split horizon SAP group. Traffic arriving on a SAP or a spoke-SDP within a split horizon group will not be forwarded to other SAPs configured in the same split horizon group, but will be forwarded to other SAPs, which are not part of the split horizon group.