Using the OpenDaylight BGP Speaker
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Transcript of Using the OpenDaylight BGP Speaker
Using the OpenDaylight BGP Speaker Giles Heron, Cisco
• Overview
• BGP-‐LS/PCE-‐P
• IPv4 and IPv6
• Adver8sing BGP routes
• Flowspec
• BMP
Agenda
Overview
BGP/PCEP Overview
OSPF
OSPF
BGP
Core
Edge
Route Reflector
Core
Edge
Route Reflector
Edge Edge
BGP
Link-‐State, IPv4, IPv6 and Flowspec routes
MPLS LSPs via PCEP
Edge
BGP
PCE-‐P
OSPF
OSPF
PCE-‐P
OSPF
BGP
OSPF
BGP
OSPF
OSPF
OSPF
BGP
App
PCE-‐P
RESTCONF
BGP
Topology
• LinkState Routes: intra-‐domain routes • From ISIS or OSPF and adver8sed via BGP-‐LS • Used to create linkstate topology
• IPv4/IPv6 Routes: routes across domains • “Internet routes” • Can both learn routes and adver8se them
• FlowSpec Routes: packet filters • Like OpenFlow rules but can leverage BGP RR infrastructure • Ac8ons encoded as BGP communi8es
Routes
Routes – the BGP RIB (or RIBs!)
• LinkState
• IPv4
• IPv6
• PCE-‐P
Topologies
BGP
RR BGP BGP
OSPF
OSPF
OSPF OSPF
OSPF
OSPF
BGP-‐LS
1. Modify 41-‐bgp-‐example.xml
2. Use RESTCONF • hUp://localhost:8181/restconf/config/network-‐topology:network-‐topology/
topology/topology-‐netconf/node/controller-‐config/yang-‐ext:mount/config:modules
Steps: 1. (op8onally) modify port to listen on (if 179 then need to run as root!) 2. Configure RIB 3. Configure Peers
Configuring BGP
Network: OSPF or IS-‐IS (IGP) Routes: distributed from IGP into BGP-‐LS RIB: Learned from BGP-‐LS speaker Topology: Lists of nodes (routers) and links
RESTCONF URL:
http://localhost:8181/ restconf/operational/ network-‐topology:network-‐topology/topology/ example-‐linkstate-‐topology
BGP-‐LS Topology
OSPF
OSPF
OSPF OSPF
OSPF
OSPF
BGP-‐LS
App
BGP-‐LS
Topo Bldr
RESTCONF
• List of all PCCs (Path Computa8on Clients)
• For each PCC, list of LSPs for which it is the head-‐end device.
• Topology: Created by PCE-‐P plugin
RESTCONF URL:
http://localhost:8181/ restconf/operational/ network-‐topology:network-‐topology/ topology/pcep-‐topology
PCE-‐P Topology
MPLS
MPLS
MPLS MPLS
MPLS
MPLS
BGP-‐LS
PCE-‐P
PCE-‐P
PCE-‐P
App
PCE-‐P
RESTCONF
Node LSPs x ..,..,.. y ..,..,.. z ..,..,..
LSPs
• PCE creates MPLS-‐TE Label Switched Paths on PCC
• Can modify LSP a`er setup or delete LSP
PCE-‐P LSPs (dynamic)
RESTCONF URL: http://localhost:8181/
restconf/operations/ network-‐topology:network-‐topology/ topology/pcep-‐topology:add-‐lsp (update-‐lsp / remove-‐lsp)
MPLS
MPLS
MPLS MPLS
MPLS
MPLS
BGP-‐LS
PCE-‐P
PCE-‐P
PCE-‐P
App
PCE-‐P
RESTCONF
Node LSPs x ..,..,.. y ..,..,.. z ..,..,..
LSPs
• PCC delegates locally configured MPLS-‐TE LSP to PCE for path selec8on:
• Use update-‐lsp RPC to set path
PCE-‐P LSPs (delegated)
interface tunnel-‐te1 ipv4 unnumbered Loopback0 signalled-‐name foo ! destination 192.168.100.4 path-‐option 1 dynamic pce pce delegation
MPLS
MPLS
MPLS MPLS
MPLS
MPLS
BGP-‐LS
PCE-‐P
PCE-‐P
PCE-‐P
App
PCE-‐P
RESTCONF
Node LSPs x ..,..,.. y ..,..,.. z ..,..,..
LSPs
Demo BGP-LS/PCE-P
Network: BGP sessions between ASes Routes: IPv4 unicast BGP routes RIB: Learned from Route Reflector Topology: List of BGP next-‐hops
(and prefixes per next-‐hop) RESTCONF URL:
http://localhost:8181/ restconf/operational/ network-‐topology:network-‐topology/topology/ example-‐ipv4-‐topology
IPv4 (BGP) Topology
BGP
RR BGP BGP
App
BGP
Topo Bldr
RESTCONF
• IPv4/IPv6 Routes: inter-‐domain routes
• FlowSpec Routes: packet filters
• APP RIB is config (main RIB is opera8onal) • APP RIB is an iBGP peer of the main RIB • So need eBGP to real peers (for now!)
AdverJsing BGP Routes (ApplicaJon RIB)
OSPF
OSPF
OSPF OSPF
OSPF
BGP
OSPF BGP OSPF
App
BGP
RESTCONF
App RIB BGP RIB
Demo Advertising IPv4 Routes
RFC5575 -‐ Similar to OpenFlow but uses BGP to distribute match/ac8on rules
SeKng “Flows” (FlowSpec)
Matches: • Source / Des8na8on IP prefix • IP Protocol • Source / Des8na8on TCP/UDP port • ICMP Type / Code • TCP Flags • Packet Length • DSCP Field • Fragment (DF, IsF, FF, LF)
AcJons: • Rate limit • Traffic sampling • Redirec8on • Traffic marking (DSCP) • And more... (op8onal)
• dra`-‐ied-‐grow-‐bmp-‐11
• Enables access to peer’s adj-‐rib-‐in and effec8ve-‐rib-‐in • Means you get a shedload of prefixes!
BMP (BGP Monitoring Protocol)
BGP
RR BGP BGP
App
BMP
RESTCONF
BMP
Demo BMP
Thank you
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