Section: 5.14.2.2 Routing
Content: The following description applies to all the Configuration Transfer messages used for the exchange of the E-UTRAN transparent container. The source RAN node sends a message to its MME including the source and destination addresses. The MME uses the destination address to route the message encapsulated in a GTPv2 message to the correct MME via the S10 interface (see TS 29.274[ 3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3 ]  [43]). The MME connected to the target eNodeB decides which RAN node to send the message to, based on the destination address. For Dual Connectivity with E-UTRAN as Master RAN node and NR as Secondary RAN node as defined in TS 37.340[ Evolved Universal Terrestrial Radio Access (E-UTRA) and NR; Multi-connectivity; Overall Description; Stage-2 ]  [85], target eNodeB decides which candidate en-gNB to send the message to, based on the destination address.