Ethernet OAM enabled OpenFlow Controller
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1 Ethernet OAM enabled OpenFlow Controller Ronald van der Pol (this work was funded by SURFnet GigaPort 3)
2 Outline! Introduction! What is OpenFlow! What is IEEE 802.1ag Ethernet OAM! Open source implementation of IEEE 802.1ag! Integration of 802.1ag with NOX OpenFlow controller! Future plans
3 Introduction! Example of how end-users can easily add network (management & routing) protocols to OpenFlow switches! NOX OpenFlow controller is extensible with 3rd party components! We implemented IEEE 802.1ag as NOX component! Demo: monitor link status by running IEEE 802.1ag protocol between OpenFlow controllers via the datapath of OpenFlow switches (but it also interoperates with switches that support 802.1ag, e.g. Cisco switch in our demo)
4 What is OpenFlow?! API to program OpenFlow switches (insert flow entries)! Separate control plane and data plane! Control plane: OpenFlow controller! Data plane: OpenFlow switch! Flow entry: match action! Match on Ethernet src/dst address, ethertype, IP src/dst address, TCP/UDP port, etc! Action:! Output to port(s)! Drop! FLOOD! Modify (e.g. VLAN tag rewrite)! Send to controller
5 IEEE 802.1ag! Protocol for Ethernet OAM (Operations, Administration and Maintenance)! Ethernet frames with type 0x8902! Three message types:! Loopback Messages (L2 ping)! Link Trace Messages (L2 traceroute)! Continuity Check Messages (periodic hello messages)! Sent from Ethernet ports by Maintenance Points (MP)! Maintenance Association consists of several MPs! MPs act on specific Maintenance Level (0.. 7)! Packets with higher level are forwarded! Packets with same level are processed! Packets with lower level are dropped
6 IEEE 802.1ag Type Details! Continuity Check (CC)! Detect loss of connectivity! Periodic hello messages from MEPs! Processed by MEPs! CC frames sent to multicast group, no replies are sent! Loopback Message/Reply (LBM/LBR)! Check for reachability! Sent manually from MEPs via CLI! Processed by MIPs/MEPs! Unicast request, unicast reply! Link Trace Message/Reply (LTM/LTR)! Path information! Sent manually from MEPs via CLI! Processed by MIPs/MEPs in path! Multicast request including TTL, unicast replies
7 802.1ag MEPs and MIPs MIP MEP Maintenance Domain Levels router router Ethernet switch Ethernet switch router router MD level 7 MD level 5 MD level 0
8 Open Source Implementation! Dot1ag-utils ( New BSD License! Supported on Arista, FreeBSD, Linux and MacOSX! Integrated with NOX OpenFlow controller! Work In Progress! Powerful debugging tool for Ethernet based lightpaths, VPNs, etc.! Ping to Ethernet MAC addresses of routers and switches! You only need a server and install the software on it
9 Booth #62 demo! Dutch Research Consortium booth! Link status (UP/DOWN) monitoring of multi-domain (Canada, Netherlands, USA) Ethernet network! Ethernet OAM (IEEE 802.1ag) used to monitor links! Link status recorded in RRD database! PerfSONAR used to publish current link status! Collector retrieves current perfsonar data and presents status of complete network on website
10 OpenFlow Demonstrations by CRC (Ottawa), (Chicago), NCHC (Tainan), (Amsterdam) SCInet Research Sandbox Tainan Seattle SCInet Research Sandbox OpenFlow MEP 200 SCInet SRS VM NOX/dot1ag perfsonar NCHC NetFPGA NOX-D SCInet SRS OF-Pronto SCInet SRS OF-NEC NCHC NetFPGA NOX-D SCInet Network Arista OF-Pronto NCKU NetFPGA NOX-D Booth 313 NetFPGA NOX-D OF-Pronto MEP 205 MEP 2 CRC OF-Pronto CRC NOX/dot1ag perfsonar CRC Cisco 3750 CRC NetFPGA StarLight Ciena OME NetherLight Ciena OME StarLight Arista NetherLight Ciena ERS PC2 OF-Pronto PC1 booth NOX/dot1ag perfsonar info@sara.nl Ottawa NetFPGA NOX-D Arista switch P.O. Box GP Amsterdam Netherlands booth NOX/dot1ag perfsonar NOX/dot1ag perfsonar MEP 209 MEP 20 Chicago Amsterdam MEP 52 Cisco ag Arista Arista NetFPGA MEP 51 Booth 62 Booth 2615 Chicago NOX/dot1ag perfsonar OF-Pronto2 Amsterdam
11 NOX OpenFlow Controller dot1ag-utils component Flow Entry: dl_type=0x8902,actions=controller IEEE 802.1ag PDU OpenFlow Protocol IEEE 802.1ag PDU OpenFlow Protocol IEEE 802.1ag PDU Pronto OpenFlow switch IEEE 802.1ag PDU
12 Monitoring of Ethernet OAM CCM PDU Open Receiver Ethernet VLAN OpenFlow controller Flow dot1ag-utils continuity check daemon CCM PDU Unix server CCM PDU Open NOX NOX OpenFlow controller Flow continuity check daemon Monitor Webbrowser RRD file Unix server Apache Webserver perfsonar-ps dot1ag-utils Measurement Point SOA P X ML Initiator Unix server Other Measurement Points CGI script perfsonar client
13 Ethernet Sandbox CRC Ottawa MEP measurement end point with MD level SCinet research sandbox Dutch Research booth 62 Open Flow Open Flow Open Flow NOX + dot1ag-utils + perfsonar NOX + dot1ag-utils + perfsonar NOX + dot1ag-utils + perfsonar collector Open Flow NOX + dot1ag-utils + perfsonar Open Flow Open Flow monitor booth 2615 NOX + dot1ag-utils + perfsonar NOX + dot1ag-utils + perfsonar Supercomputing 2011 Seattle Chicago Amsterdam
14
15 Future Work! Implement complete 802.1ag state machine! Current limitations! No forwarding of 802.1ag frames! Partly implemented Maintenance End Point functionality! No SNMP agent implemented yet! Implement ITU Y.1731! Frame loss measurements! Frame delay measurements
16 More Information!!!! Mail to or Please visit us at Dutch Research Consortium booth $62 Thanks to our partners
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