Virtualized EPC integrated with SDN Contact: Dr. Jose Costa-Requena (jose.costa@aalto.fi) Test bed virtualized EPC Virtualized EPC (vEPC): UE = Samsung LTE dongles eNodeB = Nokia commercial eNodeB MME = Own implementation S/PGW = Open Source implementation Nokia eNodeB UE LTE dongle © 2013 EIT ICT Labs 2 Testbed virtualized EPC & SDN backhaul Virtualized EPC (vEPC): UE = Samsung LTE dongles eNodeB = Nokia commercial eNodeB MME = Own implementation S/PGW = Open Source implementation SDN (backhaul) = Alix switches with OpenFlow 1.3) CES switch Nokia eNodeB UE LTE dongle © 2013 EIT ICT Labs 3 Virtualized EPC migration across data centers Virtualized EPC (vEPC): UE = Samsung LTE dongles eNodeB = Nokia commercial eNodeB MME = Own implementation S/PGW = Open Source implementation SDN (backhaul) = Alix switches OPF 1.3 Nokia Migration over Openstack eNodeB UE LTE dongle CES switch Nokia eNodeB UE LTE dongle CES switch © 2013 EIT ICT Labs 4 VLAN mapping conecting data centers VNF Live Migration • Live migration = move a VM from a host to another while it runs • Example use cases • Clear a failing host • Empty a host for maintenance • Move instances to balance load • OpenStack supports live migration via additional configuration • We studied the effects on migrating a VNFs with KVM hypervisor within an OpenStack cloud deployment MME Live Migration • MME • Ping the active MME instance from a VM inside the testbed with 1ms interval • Measure packet loss and delays during live migration • Results • Packet loss range from 3 to 20 packets • With low packet loss, the response delay up to 150ms S-/P-GW Live Migration • The GW on the data transfer path • Measure the effects during an active file transfer • Metric: TCP throughput during live migration • Downtime varies between 0.2 and 2 seconds • Worse case scenario • 2 second gap in all data transfer Next steps • Extend the testbed with new commercial eNodeB • Replace backhaul based on Alix switches into higher performance switches • Performance testing with video streaming to overload the network • Test handover scenarios and migration with high load THANKS!