Difference between revisions of "VPP/Segment Routing for MPLS"

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(Configuration on C2)
(Configuration on C3)
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  vpp# mpls local-label add 103 eos via ip4-lookup-in-table 0
 
  vpp# mpls local-label add 103 eos via ip4-lookup-in-table 0
 
Reachability to other nodes
 
Reachability to other nodes
  vpp# mpls local-label add 104 non-eos via 10.0.3.2 GigEthernet0/0/0
+
  vpp# mpls local-label add 104 non-eos via 10.0.3.2 GigEthernet0/0/0 out-labels 104
  vpp# mpls local-label add 104 eos via 10.0.3.2 GigEthernet0/0/0
+
  vpp# mpls local-label add 104 eos via 10.0.3.2 GigEthernet0/0/0 out-labels 104
  
 
This configuration can be verified with the CLI:
 
This configuration can be verified with the CLI:

Revision as of 08:05, 29 November 2017

This example shows how to use the VPP platform to setup a L3VPN with SR MPLS. For further information regarding the SR MPLS implementation and CLI please visit the doxygen documentation. For further information on SRv6, tutorials and videos please visit www.segment-routing.net.

Introduction

Please see [https://wiki.fd.io/index.php?title=VPP/Segment_Routing_for_IPV6.

Topology Diagram

SRv6 L3VPN.png

Our topology is simply going to be four VPP nodes with both, an IPv4 and IPv6 clients and servers attached to this core network. The 'core' network is running IPv4 only.

L3VPN for IPv6 traffic

SRv6 L3VPN IPv6 traffic

On all nodes we will configure the nodal SID for that node (value 100 + node) and reachability to each of the other nodal SIDs. For brevity reachability is added only in the left to right direction.

In this example what we will do is on C1 create a SR Policy with only one SID list. This SID list will be <C2, C4>. On C1 I will add an steering policy to steer all the L3 traffic destined to B::/112 via the BindingSID of the SR policy we just created before.

Note that this is a L3VPN for all traffic from A:: to B::. In this example the returning path is not shown. The user must create another SR policy at C4 with the appropriate SR LocalSIDs at the different nodes for the returning path.

Configuration on C1

vpp# mpls local-label add 102 non-eos via 10.0.0.2 GigEthernet0/0/0 out-labels 102
vpp# mpls local-label add 102 eos via 10.0.0.2 GigEthernet0/0/0 out-labels 102
vpp# mpls local-label add 103 non-eos via 10.0.1.2 GigEthernet0/0/1 out-labels 103
vpp# mpls local-label add 103 eos via 10.0.1.2 GigEthernet0/0/1 out-labels 103
vpp# mpls local-label add 104 non-eos via 10.0.1.2 GigEthernet0/0/1 out-labels 104
vpp# mpls local-label add 104 eos via 10.0.1.2 GigEthernet0/0/1 out-labels 104
vpp# sr mpls policy add bsid 999 next 102 104
vpp# sr steer l3 B::/112 via sr policy bsid 999

This configuration can be verified with the CLI:

vpp# show sr mpls pol
  [todo]
-----------
vpp# show sr mpls steering policies
  [todo]

Configuration on C2

The nodal SID

vpp# mpls local-label add 102 non-eos via mpls-llokup-in-table 0
vpp# mpls local-label add 102 eos via ip4-lookup-in-table 0

Reachability to other nodes

vpp# mpls local-label add 103 non-eos via 10.0.2.2 GigEthernet0/0/0 out-labels 103
vpp# mpls local-label add 103 eos via 10.0.2.2 GigEthernet0/0/0 out-labels 103
vpp# mpls local-label add 104 non-eos via 10.0.2.2 GigEthernet0/0/0 out-labels 104
vpp# mpls local-label add 104 eos via 10.0.2.2 GigEthernet0/0/0 out-labels 104


This configuration can be verified with the CLI:

vpp# show mpls fib
[todo]

Configuration on C3

The nodal SID

vpp# mpls local-label add 103 non-eos via mpls-llokup-in-table 0
vpp# mpls local-label add 103 eos via ip4-lookup-in-table 0

Reachability to other nodes

vpp# mpls local-label add 104 non-eos via 10.0.3.2 GigEthernet0/0/0 out-labels 104
vpp# mpls local-label add 104 eos via 10.0.3.2 GigEthernet0/0/0 out-labels 104

This configuration can be verified with the CLI:

vpp# show mpls fib
[todo]

Configuration on C4

The nodal SID

vpp# mpls local-label add 104 non-eos via mpls-llokup-in-table 0
vpp# mpls local-label add 104 eos via ip4-lookup-in-table 0

This configuration can be verified with the CLI:

vpp# show mpls fib
[todo]