At the EANTC Hot Staging Interoperability event, Ixia demonstrates Advanced Technology to enable Transport Services for Data Center Interconnect (DCI)

February 27, 2015 by Ixia Blog Team

I just returned from the EANTC Hot Staging event held at their lab in Berlin. The primary focus of this event was to validate interoperability of transport services for Data Center Interconnect (DCI), Segment Routing, L2/3VPN services over Segment Routing, and advanced test cases for SDN (OpenFlow/PCC/PCE). More than 15 companies participated in this event, including major NEMs and SDN startups. I was very pleased with the results—Ixia successfully participated in almost all complex test cases.

I would like to highlight following important test cases that help enable transport services for next-generation data center networks.

Ethernet VPN (EVPN) Single homing scenario

EVPN uses control-plane-based MAC learning. It provides separation between the control plane and data plane, which allows different encapsulation to be used in the data plane such as MPLS and VXLAN.

We tested VXLAN-based EVPN. Ixia emulated a PE node with EVPN instances, and created VXLAN overlay tunnels. Ixia also emulated CE nodes with multiple VLANs. Each VLAN was mapped with VXLAN VNI. After generating data plane traffic, we verified inclusive multicast routes (BGP type 3), Customer MAC (C-MAC), and BGP MAC advertisement routes (BGP type 2). There was no traffic loss observed for configured services.

Ixia’s EVPN emulation was proven very useful in assessing real-world use cases using large numbers of PE nodes with many EVPN instances

PBB-EVPN single homing and PBB-EVPN multi-homing scenarios

PBB EVPN PE combines the functions of a PBB BEB (Provider Backbone Bridge) and EVPN PE, where PBB encapsulated traffic is mapped to MPLS LSPs using EVPN MPLS labels. PBB mechanism reduces number of BGP MAC advertisements in the core via aggregation using backbone MAC (B-MAC) and client MAC (C-MAC)

In both case, Ixia emulated PE/CE nodes with large number of MACs. We successfully tested key features such as load-balancing, split-horizon, Multicast ingress replication, and failure recovery scenarios.

L3VPN over Segment Routing

Segment Routing technology is becoming more popular in the service provider environment because it offers better Traffic Engineering, scalability, and less control plane overhead (replacing RSVP-TE and LDP protocols).

In this test case we successfully tested L3VPN services for IPv4/v6. Ixia emulated PEs with SR nodes and advertised large number of VPNv4/v6 prefixes. We observed that all remote PE nodes properly learned these prefixes. No traffic loss observed for data plane traffic.

It is important to note that Ixia’s Next Generation Protocol Framework (NGPF) played key role in creating this service chaining. Within few minutes, we were able to create this complex topology and it worked just as expected.

VM Mobility between data centers over EVPN VXLAN

Ixia’s unique RackSim solution helped create multi-tenant data center environments by emulating Hypervisors and large number of VMs on each site. From the emulated VM manager, we performed VM migration and measured migration time.

Ixia also successfully participated in SDN/OpenFlow test cases such as Rate limiting for QoS/SLA, ECMP load balancing, 1:1 link protection, and Network provisioning with NETCONF

Some of these advanced scenarios will be showcased live in an upcoming MPLS/SDN World Congress event in Paris.

Also stay tuned, EANTC soon will publish White Paper on their website (

Additional Resources:



MPLS/SDN World Congress event in Paris