Cisco Cisco ASR 5500 トラブルシューティングガイド

Contributed by Saurabh Gupta and Krishna Kishore DV, Cisco TAC
Engineers.

Jun 19, 2015

Introduction
S10 Interface and Configuration
     S10 Interface Description
     S10 Call Flows
        Tracking Area Update Triggered MME Change with Serving GateWay Change
        TAU Triggered MME Change without SGW Change
        Attach Request with Old MME's GUTI
        S1−Based Handover with MME and SGW Change
     Domain Name Server Queries
        Target MME Selection
        Source MME Lookup
        SGW Selection
        Packet GateWay Selection
     Configuration Around S10
Load Balancing Between MMEs
Load Rebalancing
Perform Load Rebalancing (UE Offloading)
Verify Load Rebalancing (UE Offloading)
Monitor Load Rebalancing
     Load Rebalancing Show Command(s) and/or Outputs
Additional Commands
Related Information

This document describes S10 Configuration and Mobility Management Entity (MME) load balancing. MME
runs on Aggregation Services Router (ASR) 5x00 Series.

S10 interfaces facilitate user mobility between two MMEs. They provide for transfer of User Equipement
(UE) context from one MME to another with GprsTransfer Protocol version2 (GTPv2). This figure shows the
role of S10 in EPC architecture.