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BLT BGP Label based Tunneling Gunter Van de Velde Sr Technical Leader NOSTG, Cisco Systems December 2012 © 2012 Cisco and/or its affiliates. All rights reserved. 1 •  It is a new “IP” network overlay technology •  Can be seen as alternative for MPLS based upon BGP as scalable and proven control plane •  Within the Core ISP network, no more need for full routing table •  The network overlay mechanism is tunnel technology agnostic (LISP, GRE, L2TP, IPinIP, VxLAN, etc) •  BGP based Dynamic tunnelling works Intra- and Inter-domain •  Expected convergence time: <100msec © 2012 Cisco and/or its affiliates. All rights reserved. 2 •  Address family (IPv4, IPv6, VPNv4, VPNv6, IP+Label) agnostic •  Usage of proven and highly scalable Internet technologies (BGP, PIC, LFA, etc…) •  BGP database carries tunnel end-points and identifiers as ships in the night to the traditional BGP routing BGP table •  Cost optimization by getting rid of: Core MPLS control plane Internet and customer prefixes from core •  Usage of BGP technology: Fast Convergence High scalability High availability VPN Support Highly secure by utilisation of BGP security technologies (RPKI Origin Authentication, TCP-AO, etc..) BGP Remote-Next-Hop (http://datatracker.ietf.org/doc/draft-vandevelde-idr-remote-next-hop/) •  Usage of VxLAN, GRE, LISP, IP-in-IP tunnels Utilization of scalable and existing tunnel technology Connect IPv6/IPv4 islands over an IPv6/IPv4 infrastructure for both Inter- and Intra-AS networks Utilization of existing tunnel policy and RIB population mechanisms Service differentiation: enable premium exit vs best-effort exit to Internet by Network Policy •  Backward compatible and support for gradual implementation © 2012 Cisco and/or its affiliates. All rights reserved. 3 •  BGP Remote-Next-Hop ( http://tools.ietf.org/html/draft-vandevelde-idr-remote-next-hop) •  LISP - http://tools.ietf.org/doc/draft-ietf-lisp/ •  Other tunnel technologies: GRE, VxLAN, IP-in-IP, etc… •  BGP Route-Reflection (RFC4456) •  Cisco Prefix Independent Convergence •  BGP Diverse Path (RFC6774) •  BGP Add-Path (http://tools.ietf.org/html/draft-ietf-idr-add-paths) •  BGP/MPLS VPN (RFC4364) © 2012 Cisco and/or its affiliates. All rights reserved. 4 Customer 2a 1.1.3.0/24 xTR3 Next-Hop: Next-Hop: Customer 1b 2.2.2.3/32 2.2.2.4/32 1.1.2.0/24 2001:db8::3/128 2001:db8::4/128 IP Core Next-Hop: xTR2 2.2.2.2/32 2.2.2.0/24 iBGP Customer 2b 2001:db8::2/128 iBGP 2001:db8::/64 RR 1.1.4.0/24 xTR4 iBGP Next-Hop: Customer 3a 2.2.2.1/32 iBGP 1.1.5.0/24 2001:db8::1/128 iBGP iBGP Next-Hop: iBGP Customer 1a xTR1 2.2.2.7/32 2001:db8::7/128 1.1.1.0/24 xTR7 Next-Hop: Customer 3b Next-Hop: 2.2.2.6/32 xTR6 2.2.2.5/32 1.1.6.0/24 2001:db8::6/128 xTR5 2001:db8::5/128 Customer 1c 1.1.7.0/24 © 2012 Cisco and/or its affiliates. All rights reserved. 5 •  Core IGP: OSPF, EIGRP, ISIS MPLS Free Core BGP only is run only on the core edge and BGP RR support of IGP LFA •  Edge Location of the Tunnel in-/egress router BGP NLRI is used as remote network identifier and the attached BGP Remote-Next-Hop as Locator Forwarding in-/egress policy enforcement Multi-tunnel loadsharing •  Customer Networks Autonomous networks DC, finance, IT department, engineering, customers, etc… Independent address family agnostic address space Customer networks and services are network identifiers © 2012 Cisco and/or its affiliates. All rights reserved. 6 •  NLRI (Network Layer Reachability Information) is the customer network •  Next-hop is the traditional BGP Next-Hop used for traditional IP forwarding •  Remote-Next-Hop is the Tunnel End-Point used for dynamic tunnel based forwarding (Optional BGP transitive attribute) •  Multiple NLRI can point to identical Remote-Next-Hop Next-hop is used for NLRI (EID) traditional IP forwarding Traditional BGP Attributes Next-Hop Remote-Next-Hop #1[GRE] Remote-Next-Hop #2[vxlan] Remote-Next-Hop #3[IPsec] Remote customer Addresses-used for Network or service Tunnel end-point © 2012 Cisco and/or its affiliates. All rights reserved. 7 Customer 2a BGP Table 1.1.3.0/24 xTR3 Next-Hop: Destination Next- Remote-Next- Tunnel Type Next-Hop: Customer 1b 2.2.2.3/32 1.1.2.0/24 2001:db8::3/128 Hop Hop 2.2.2.4/32 2001:db8::4/128 1.1.2.0/24 2.2.2.2 2.2.2.2 GRE IP Core Next-Hop: xTR2 2.2.2.2/32 2.2.2.0/24 2001:db8::2/128 1.1.3.0/24 iBGP2 .2.2.3 1.10.3.3 CusGtoRmEer 2b iBGP 2001:db8::/64 RR 1.1.4.0/24 1.10.3.3/32 2.2.2.3 xTR4 iBGP 1.1.4.0/24 2.2.2.4 2.2.2.4 VxLAN Next-Hop: Customer 3a 2.2.2.1/32 iBGP 1.1.5.0/24 2001:db8::1/128 1.1.5.0/24 2.2.2.4 iBGP iBGP 1.1.6.0/24 2.2.2.7 2001:db8::7 Next-HoIpP: - in-IPv6 iBGP Customer 1a xTR1 2.2.2.7/32 2001:db8::7/128 1.1.1.0/24 1.1.6.0/24 2.2.2.5 2001x:TdRb7 8::7 IP-in-IPv6 Next-Hop: 1.1.7.0/24 2.2.2.6 200C1u:sdtobm8e:r:6 3 b GRE Next-Hop: 2.2.2.6/32 xTR6 2.2.2.5/32 1.1.6.0/24 2001:db8::6/128 2001:db8::5/128 Customer 1c 1.1.7.0/24 © 2012 Cisco and/or its affiliates. All rights reserved. 8 Customer 2a 1.1.3.0/24 xTR3 Next-Hop: Next-Hop: Customer 1b 2.2.2.3/32 2.2.2.4/32 1.1.2.0/24 2001:db8::3/128 2001:db8::4/128 IP Core Next-Hop: xTR2 2.2.2.2/32 2.2.2.0/24 iBGP Customer 2b 2001:db8::2/128 iBGP 2001:db8::/64 RR 1.1.4.0/24 xTR4 iBGP Next-Hop: Customer 3a 2.2.2.1/32 iBGP 1.1.5.0/24 2001:db8::1/128 iBGP iBGP iBGP Destination Next-Hop RemNoextet--HNoexpt:- H op Tunnel Type Customer 1a xTR1 2.2.2.7/32 2001:db8::7/128 1.1.1.0/24 1.1.2.0/24 2.2.2.2 xTR7 2.2.2.2 GRE 1.1.3.0/24 2.2.2.3 1.10.3.3 GRE Next-Hop: Customer 3b Next-Hop: 2.2.2.6/32 xTR6 1.21.02..32..35//3322 2.2.2.31 .1.6.0/24 2001:db8::6/128 2001:db8::5/128 1.1.4.0/24 2.2.2.4 2.2.2.4 VxLAN Customer 1c 1.1.5.0/24 2.2.2.4 1.1.7.0/24 1.1.6.0/24 2.2.2.7 2001:db8::7 IP-in-IPv6 1.1.6.0/24 2.2.2.5 2001:db8::7 IP-in-IPv6 1.1.7.0/24 2.2.2.6 2001:db8::6 GRE © 2012 Cisco and/or its affiliates. All rights reserved. 9 Customer 2a 1.1.3.0/24 xTR3 Next-Hop: Customer 1b 2.2.2.4/32 1.1.2.0/24 2001:db8::4/128 xTR2 Customer 2b 1.1.4.0/24 Normal IP Packet xTR4 Next-Hop: Customer 3a 2.2.2.1/32 2001:db8::1/128 IP Header 1.1.5.0/24 Customer 1a xTR1 Packet to Customer 3a IP Header Packet to Customer 3a 1.1.1.0/24 xTR7 Customer 3b xTR6 1.1.6.0/24 Customer 1c 1.1.7.0/24 Router with Full BGP Table © 2012 Cisco and/or its affiliates. All rights reserved. 10

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Can be seen as alternative for MPLS based upon BGP as scalable and Usage of proven and highly scalable Internet technologies (BGP, PIC, LFA, etc…).
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BGP Label based Tunneling - apricot PDF

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BLT BGP Label based Tunneling Gunter Van de Velde Sr Technical Leader NOSTG, Cisco Systems December 2012 © 2012 Cisco and/or its affiliates. All rights reserved. 1 •  It is a new “IP” network overlay technology •  Can be seen as alternative for MPLS based upon BGP as scalable and proven control plane •  Within the Core ISP network, no more need for full routing table •  The network overlay mechanism is tunnel technology agnostic (LISP, GRE, L2TP, IPinIP, VxLAN, etc) •  BGP based Dynamic tunnelling works Intra- and Inter-domain •  Expected convergence time: <100msec © 2012 Cisco and/or its affiliates. All rights reserved. 2 •  Address family (IPv4, IPv6, VPNv4, VPNv6, IP+Label) agnostic •  Usage of proven and highly scalable Internet technologies (BGP, PIC, LFA, etc…) •  BGP database carries tunnel end-points and identifiers as ships in the night to the traditional BGP routing BGP table •  Cost optimization by getting rid of: Core MPLS control plane Internet and customer prefixes from core •  Usage of BGP technology: Fast Convergence High scalability High availability VPN Support Highly secure by utilisation of BGP security technologies (RPKI Origin Authentication, TCP-AO, etc..) BGP Remote-Next-Hop (http://datatracker.ietf.org/doc/draft-vandevelde-idr-remote-next-hop/) •  Usage of VxLAN, GRE, LISP, IP-in-IP tunnels Utilization of scalable and existing tunnel technology Connect IPv6/IPv4 islands over an IPv6/IPv4 infrastructure for both Inter- and Intra-AS networks Utilization of existing tunnel policy and RIB population mechanisms Service differentiation: enable premium exit vs best-effort exit to Internet by Network Policy •  Backward compatible and support for gradual implementation © 2012 Cisco and/or its affiliates. All rights reserved. 3 •  BGP Remote-Next-Hop ( http://tools.ietf.org/html/draft-vandevelde-idr-remote-next-hop) •  LISP - http://tools.ietf.org/doc/draft-ietf-lisp/ •  Other tunnel technologies: GRE, VxLAN, IP-in-IP, etc… •  BGP Route-Reflection (RFC4456) •  Cisco Prefix Independent Convergence •  BGP Diverse Path (RFC6774) •  BGP Add-Path (http://tools.ietf.org/html/draft-ietf-idr-add-paths) •  BGP/MPLS VPN (RFC4364) © 2012 Cisco and/or its affiliates. All rights reserved. 4 Customer 2a 1.1.3.0/24 xTR3 Next-Hop: Next-Hop: Customer 1b 2.2.2.3/32 2.2.2.4/32 1.1.2.0/24 2001:db8::3/128 2001:db8::4/128 IP Core Next-Hop: xTR2 2.2.2.2/32 2.2.2.0/24 iBGP Customer 2b 2001:db8::2/128 iBGP 2001:db8::/64 RR 1.1.4.0/24 xTR4 iBGP Next-Hop: Customer 3a 2.2.2.1/32 iBGP 1.1.5.0/24 2001:db8::1/128 iBGP iBGP Next-Hop: iBGP Customer 1a xTR1 2.2.2.7/32 2001:db8::7/128 1.1.1.0/24 xTR7 Next-Hop: Customer 3b Next-Hop: 2.2.2.6/32 xTR6 2.2.2.5/32 1.1.6.0/24 2001:db8::6/128 xTR5 2001:db8::5/128 Customer 1c 1.1.7.0/24 © 2012 Cisco and/or its affiliates. All rights reserved. 5 •  Core IGP: OSPF, EIGRP, ISIS MPLS Free Core BGP only is run only on the core edge and BGP RR support of IGP LFA •  Edge Location of the Tunnel in-/egress router BGP NLRI is used as remote network identifier and the attached BGP Remote-Next-Hop as Locator Forwarding in-/egress policy enforcement Multi-tunnel loadsharing •  Customer Networks Autonomous networks DC, finance, IT department, engineering, customers, etc… Independent address family agnostic address space Customer networks and services are network identifiers © 2012 Cisco and/or its affiliates. All rights reserved. 6 •  NLRI (Network Layer Reachability Information) is the customer network •  Next-hop is the traditional BGP Next-Hop used for traditional IP forwarding •  Remote-Next-Hop is the Tunnel End-Point used for dynamic tunnel based forwarding (Optional BGP transitive attribute) •  Multiple NLRI can point to identical Remote-Next-Hop Next-hop is used for NLRI (EID) traditional IP forwarding Traditional BGP Attributes Next-Hop Remote-Next-Hop #1[GRE] Remote-Next-Hop #2[vxlan] Remote-Next-Hop #3[IPsec] Remote customer Addresses-used for Network or service Tunnel end-point © 2012 Cisco and/or its affiliates. All rights reserved. 7 Customer 2a BGP Table 1.1.3.0/24 xTR3 Next-Hop: Destination Next- Remote-Next- Tunnel Type Next-Hop: Customer 1b 2.2.2.3/32 1.1.2.0/24 2001:db8::3/128 Hop Hop 2.2.2.4/32 2001:db8::4/128 1.1.2.0/24 2.2.2.2 2.2.2.2 GRE IP Core Next-Hop: xTR2 2.2.2.2/32 2.2.2.0/24 2001:db8::2/128 1.1.3.0/24 iBGP2 .2.2.3 1.10.3.3 CusGtoRmEer 2b iBGP 2001:db8::/64 RR 1.1.4.0/24 1.10.3.3/32 2.2.2.3 xTR4 iBGP 1.1.4.0/24 2.2.2.4 2.2.2.4 VxLAN Next-Hop: Customer 3a 2.2.2.1/32 iBGP 1.1.5.0/24 2001:db8::1/128 1.1.5.0/24 2.2.2.4 iBGP iBGP 1.1.6.0/24 2.2.2.7 2001:db8::7 Next-HoIpP: - in-IPv6 iBGP Customer 1a xTR1 2.2.2.7/32 2001:db8::7/128 1.1.1.0/24 1.1.6.0/24 2.2.2.5 2001x:TdRb7 8::7 IP-in-IPv6 Next-Hop: 1.1.7.0/24 2.2.2.6 200C1u:sdtobm8e:r:6 3 b GRE Next-Hop: 2.2.2.6/32 xTR6 2.2.2.5/32 1.1.6.0/24 2001:db8::6/128 2001:db8::5/128 Customer 1c 1.1.7.0/24 © 2012 Cisco and/or its affiliates. All rights reserved. 8 Customer 2a 1.1.3.0/24 xTR3 Next-Hop: Next-Hop: Customer 1b 2.2.2.3/32 2.2.2.4/32 1.1.2.0/24 2001:db8::3/128 2001:db8::4/128 IP Core Next-Hop: xTR2 2.2.2.2/32 2.2.2.0/24 iBGP Customer 2b 2001:db8::2/128 iBGP 2001:db8::/64 RR 1.1.4.0/24 xTR4 iBGP Next-Hop: Customer 3a 2.2.2.1/32 iBGP 1.1.5.0/24 2001:db8::1/128 iBGP iBGP iBGP Destination Next-Hop RemNoextet--HNoexpt:- H op Tunnel Type Customer 1a xTR1 2.2.2.7/32 2001:db8::7/128 1.1.1.0/24 1.1.2.0/24 2.2.2.2 xTR7 2.2.2.2 GRE 1.1.3.0/24 2.2.2.3 1.10.3.3 GRE Next-Hop: Customer 3b Next-Hop: 2.2.2.6/32 xTR6 1.21.02..32..35//3322 2.2.2.31 .1.6.0/24 2001:db8::6/128 2001:db8::5/128 1.1.4.0/24 2.2.2.4 2.2.2.4 VxLAN Customer 1c 1.1.5.0/24 2.2.2.4 1.1.7.0/24 1.1.6.0/24 2.2.2.7 2001:db8::7 IP-in-IPv6 1.1.6.0/24 2.2.2.5 2001:db8::7 IP-in-IPv6 1.1.7.0/24 2.2.2.6 2001:db8::6 GRE © 2012 Cisco and/or its affiliates. All rights reserved. 9 Customer 2a 1.1.3.0/24 xTR3 Next-Hop: Customer 1b 2.2.2.4/32 1.1.2.0/24 2001:db8::4/128 xTR2 Customer 2b 1.1.4.0/24 Normal IP Packet xTR4 Next-Hop: Customer 3a 2.2.2.1/32 2001:db8::1/128 IP Header 1.1.5.0/24 Customer 1a xTR1 Packet to Customer 3a IP Header Packet to Customer 3a 1.1.1.0/24 xTR7 Customer 3b xTR6 1.1.6.0/24 Customer 1c 1.1.7.0/24 Router with Full BGP Table © 2012 Cisco and/or its affiliates. All rights reserved. 10

Description:
Can be seen as alternative for MPLS based upon BGP as scalable and Usage of proven and highly scalable Internet technologies (BGP, PIC, LFA, etc…).
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