OpenFlow OAM. Ronald van der Pol 1/31. NORDUnet 2012, Sep 2012, Oslo, Norway
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1 OpenFlow OAM Ronald van der Pol 1/31
2 Overview Short intro to OpenFlow Short intro to Ethernet OAM Open Source implementakon of IEEE 802.1ag Dot1ag- ukls Ethernet OAM in OpenFlow Dot1ag- ukls integrakon with NOX CCM support in Open vswitch (OVS) Conclusions 2/31
3 Short Intro to OpenFlow OpenFlow is a form of SoTware Defined Networking (SDN) Switches do not act as individual boxes that exchange roukng protocols, but there is a centralized global view of the network running on a server (cluster) Move control plane from each switch to outside server (cluster) Define policy in an SDN applicakon and compile that to forwarding entries in switches OpenFlow is the protocol between centralized controller and OpenFlow switches 3/31
4 Control Plane SeparaKon Control Plane OpenFlow protocol Control Plane Data Plane Data Plane Ethernet Switch OpenFlow Switch 4/31
5 OpenFlow API & Protocol OpenFlow Controller OpenFlow Protocol TCP SSL TLS OpenFlow API OpenFlow Switch Flow Table 5/31
6 Flow Table Match on header: Ingress port, Ethernet src/dst address, Ethernet type, VLAN ID/priority, IPv4 src/dst address, IPv4 protocol number, IPv4 ToS, TCP/UDP src/dst port, ICMP type/code Perform ackon: Output to port(s), flood, send to controller, drop, modify field, 6/31
7 OpenFlow Controlled Network OpenFlow Application OpenFlow Controller OpenFlow Protocol 7/31
8 OpenFlow Controller OpenFlow controller can: Push forwarding entries to switches Retrieve informakon (e.g. stakskcs) from switches Receive packets from network date plane Send packets to network data plane 8/31
9 OpenFlow Status OpenFlow support in several commercial switches NEC, IBM, HP, Pica8, and many more announced Supported by Open vswitch IntegraKon with OpenStack & OpenNebula Deployed in Stanford campus and Google s network between data centres (G- scale net) Nicira OpenFlow startup acquired by VMware for USD 1.05 billion in cash 9/31
10 Short Intro to Ethernet OAM Two main protocols IEEE 802.1ag (Ethernet ping/trace/hello) ITU- T Y.1731 (frame delay/loss/throughput) Normal Ethernet frames with type 0x8902 OAM frames are sent and processed by Maintenance associakon Intermediate Points (MIPs) Maintenance associakon End Points (MEPs) 10/31
11 MIPs and MEPs MIP MEP Maintenance Domain Levels switch/router Ethernet switch Ethernet switch Ethernet switch Ethernet switch switch/router MD level 7 MD level 5 MD level 3 MD level 0 11/31
12 Ethernet OAM Status Not widely implemented Mostly in WAN carrier Ethernet switches, oten in combinakon with PBB Hardly in enterprise/data centre switches Deployment mainly by carrier Ethernet operators Lille deployment (yet?) by ISPs/NRENs 12/31
13 Open Source ImplementaKon of IEEE 802.1ag hlp://nrg.sara.nl/dot1ag- ukls New BSD license Planorm independent code, so runs on most Unix like systems: FreeBSD Linux MacOS NetBSD 13/31
14 Dot1ag- ukls Ethping Loopback message responder Sends loopback messages Ethtrace Link trace message responder Sends link trace messages Dot1ag_ccd Transmits periodic ConKnuity Check Messages Processes CCMs from other MEPs Syslogging for link and interface/port outages 14/31
15 MEP MIP Juniper router Ciena Ethernet switch Arista Ethernet switch Linux server "donder" 00:14:0d:0b:10:c4 00:1b:c0:97:38:c6 00:14:0d:0b:11:10 00:14:0d:0b:10:c0 00:14:0d:0b:10:c1 dot1ag-utils daemon 00:1C:73:08:11:84 l2ping - i eth5 - v l 7 - c 10 00:1b:c0:97:38:c6 CFM LBM to 00:1b:c0:97:38:c6 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms 60 bytes from 00:1b:c0:97:38:c6, sequence , ms root@donder:~# 15/31
16 MEP MIP Juniper router Ciena Ethernet switch Arista Ethernet switch Linux server "donder" 00:14:0d:0b:10:c4 00:1b:c0:97:38:c6 00:14:0d:0b:11:10 00:14:0d:0b:10:c0 00:14:0d:0b:10:c1 dot1ag-utils daemon 00:1C:73:08:11:84 l2trace - i eth5 - v l 7 00:1b:c0:97:38:c6 Sending CFM LTM probe to 00:1b:c0:97:38:c6 ll 1: LTM with id reply from 00:14:0d:0b:10:c1, id= , ll=0, RlyFDB ll 2: LTM with id reply from 00:14:0d:0b:10:c4, id= , ll=0, RlyFDB reply from 00:14:0d:0b:10:c1, id= , ll=1, RlyFDB ll 3: LTM with id reply from 00:14:0d:0b:10:c4, id= , ll=1, RlyFDB reply from 00:14:0d:0b:10:c1, id= , ll=2, RlyFDB reply from 00:1b:c0:97:38:c6, id= , ll=0, RlyHit root@donder:~# 16/31
17 Ethernet OAM in OpenFlow Exchanging IEEE 802.1ag frames via controller Dot1ag- ukls module for NOX Transmits periodic CCM frames Monitoring CCMs sent by remote MEPs DistribuKng interface status via perfsonar Open vswitch Very basic CCM support Remote MEP monitoring via CLI 17/31
18 Demo at SC11 conference Part of the SCInet Research Sandbox (OpenFlow/100G) 11 proposals accepted, ours among the top 6 Dutch Research Consortium booth Link status (UP/DOWN) monitoring of multi-domain Ethernet network (Canada, Netherlands, USA) 18/31
19 SC11 Demo Monitoring Setup 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 19/31
20 NOX & dot1ag- ukls 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 20/31
21 OpenFlow Demonstrations by CRC (Ottawa), icair (Chicago), NCHC (Tainan), SARA (Amsterdam) SCInet Research Sandbox Seattle SCInet Research Sandbox OpenFlow Tainan MEP 200 SCInet SRS VM NOX/dot1ag perfsonar SARA Booth 313 NCHC NetFPGA NOX-D SCInet SRS OF-Pronto icair SCInet SRS OF-NEC SARA SCInet Network SARA Arista SARA OF-Pronto NCHC NetFPGA NOX-D icair NetFPGA NOX-D 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 icair PC2 icair OF-Pronto icair PC1 SARA booth NOX/dot1ag perfsonar info@sara.nl Ottawa icair NetFPGA NOX-D icair Arista icair switch icair OF-Pronto NCKU NetFPGA NOX-D SARA P.O. Box GP Amsterdam Netherlands icair booth NOX/dot1ag perfsonar icair NOX/dot1ag perfsonar MEP 209 MEP 20 Chicago Amsterdam MEP 52 SARA Cisco ag SARA Arista SARA Arista SARA NetFPGA MEP 51 Booth 642 Booth 2615 NORDUnet 2012, Sep 2012, Oslo, Norway Chicago SARA NOX/dot1ag perfsonar SARA OF-Pronto2 Amsterdam 21/31
22 Monitoring Control Plane CRC Ottawa SCinet research sandbox Dutch Research booth Open Flow Open Flow 4 4 Open 4 Flow NOX + dot1ag-utils + perfsonar NOX + dot1ag-utils + perfsonar NOX + dot1ag-utils + perfsonar collector 4 Open Flow 4 NOX + dot1ag-utils + perfsonar Open Flow Open Flow 4 monitor icair booth 2615 NOX + dot1ag-utils + perfsonar NOX + dot1ag-utils + perfsonar Supercomputing 2011 Seattle icair Chicago SARA Amsterdam 22/31
23 Monitoring Web Site 23/31
24 Monitoring InformaKon Flow Unix server Initiator Open Flow CCM PDU NOX OpenFlow controller dot1ag-utils continuity check daemon Receiver Ethernet VLAN CCM PDU Unix server NOX dot1ag-utils CCM PDU Open Flow OpenFlow continuity RRD controller check daemon file perfsonar-ps Measurement Point Monitor Web browser Apache Web server Unix server SOAP XML CGI script perfsonar client Other Measurement Points 24/31
25 25/31
26 Open vswitch SoTware switch running on Linux (Debian, Fedora, Ubuntu) FreeBSD Control stack for OpenFlow switches e.g. Pica8, Centec Networks switches Apache 2.0 license 26/31
27 27/31
28 Enabling CCM on Interface ovs- vsctl - - db=tcp: :6633 set Interface ge- 1/1/26 cfm_mpid= /31
29 Ethernet CFM in OVS Link UP: appctl cfm/show ge- 1/1/ MPID 4000: opstate: up remote_opstate: up interval: 1000ms next CCM tx: 209ms next fault check: 1477ms Remote MPID 1200: recv since check: true opstate: up root@xorplus# Link DOWN: root@xorplus#ovs- appctl cfm/show ge- 1/1/ MPID 4000: fault opstate: up remote_opstate: up interval: 1000ms next CCM tx: 142ms next fault check: 2883ms root@xorplus# 29/31
30 Summary Open source 802.1ag implementakon Dot1ag- ukls integrakon with NOX Open vswitch has basic OAM support (CCM) We need to discuss how to do hardware assisted OpenFlow OAM (802.1ag/Y.131) 30/31
31 Thank You 31/31
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