tmnxMobServBcS5S8SgwTeid 1.3.6.1.4.1.6527.3.1.2.66.2.5.1.18

The value of tmnxMobServBcS5S8SgwTeid indicates the Tunnel Endpoint Identifier (TEID) of the Serving Gateway (SGW) on the S5 or S8 reference point.