Preferred tunnel and tunnel selection order configuration example

PE 1 has multiple tunnels to reach PE 2: two MPLS TE tunnels on interfaces Tunnel 1 and Tunnel 3, one GRE tunnel on interface Tunnel 2, and one LDP LSP tunnel.

PE 1 has multiple MPLS VPN instances: vpna, vpnb, vpnc, vpnd, vpne, vpnf, and vpng. Table 12 shows the tunnel policy that PE 1 uses for each VPN instance.

1. Configure tunnel policies on PE 1:

   # Create tunnel policy preferredte1, and configure tunnel 1 as the preferred tunnel.

   <PE1> system-view
   [PE1] tunnel-policy preferredte1
   [PE1-tunnel-policy-preferredte1] preferred-path tunnel 1
   [PE1-tunnel-policy-preferredte1] quit
   

   # Create tunnel policy preferredte3, and configure tunnel 3 as the preferred tunnel.

   [PE1] tunnel-policy preferredte3
   [PE1-tunnel-policy-preferredte3] preferred-path tunnel 3
   [PE1-tunnel-policy-preferredte3] quit
   

   # Create tunnel policy preferredgre2, and configure tunnel 2 as the preferred tunnel.

   [PE1] tunnel-policy preferredgre2
   [PE1-tunnel-policy-preferredgre2] preferred-path tunnel 2
   [PE1-tunnel-policy-preferredgre2] quit
   

   # Create tunnel policy select-lsp.

   [PE1] tunnel-policy select-lsp
   

   # Configure the policy to select only one tunnel in LDP LSP-GRE-MPLS TE order.

   [PE1-tunnel-policy-select-lsp] select-seq lsp gre cr-lsp load-balance-number 1
   [PE1-tunnel-policy-select-lsp] quit
   

2. Configure MPLS VPN instances and apply tunnel policies to the VPN instances:

   # Create MPLS VPN instances vpna and vpnb, and apply tunnel policy preferredte1 to them.

   [PE1] ip vpn-instance vpna
   [PE1-vpn-instance-vpna] route-distinguisher 100:1
   [PE1-vpn-instance-vpna] vpn-target 100:1
   [PE1-vpn-instance-vpna] tnl-policy preferredte1
   [PE1-vpn-instance-vpna] quit
   [PE1] ip vpn-instance vpnb
   [PE1-vpn-instance-vpnb] route-distinguisher 100:2
   [PE1-vpn-instance-vpnb] vpn-target 100:2
   [PE1-vpn-instance-vpnb] tnl-policy preferredte1
   [PE1-vpn-instance-vpnb] quit
   

   # Create MPLS VPN instances vpnc and vpnd, and apply tunnel policy preferredte3 to them.

   [PE1] ip vpn-instance vpnc
   [PE1-vpn-instance-vpnc] route-distinguisher 100:3
   [PE1-vpn-instance-vpnc] vpn-target 100:3
   [PE1-vpn-instance-vpnc] tnl-policy preferredte3
   [PE1-vpn-instance-vpnc] quit
   [PE1] ip vpn-instance vpnd
   [PE1-vpn-instance-vpnd] route-distinguisher 100:4
   [PE1-vpn-instance-vpnd] vpn-target 100:4
   [PE1-vpn-instance-vpnd] tnl-policy preferredte3
   [PE1-vpn-instance-vpnd] quit
   

   # Create MPLS VPN instances vpne and vpnf, and apply tunnel policy preferredgre2 to them.

   [PE1] ip vpn-instance vpne
   [PE1-vpn-instance-vpne] route-distinguisher 100:5
   [PE1-vpn-instance-vpne] vpn-target 100:5
   [PE1-vpn-instance-vpne] tnl-policy preferredgre2
   [PE1-vpn-instance-vpne] quit
   [PE1] ip vpn-instance vpnf
   [PE1-vpn-instance-vpnf] route-distinguisher 100:6
   [PE1-vpn-instance-vpnf] vpn-target 100:6
   [PE1-vpn-instance-vpnf] tnl-policy preferredgre2
   [PE1-vpn-instance-vpnf] quit
   

   # Create MPLS VPN instance vpng, and apply tunnel policy select-lsp to it.

   [PE1] ip vpn-instance vpng
   [PE1-vpn-instance-vpng] route-distinguisher 100:7
   [PE1-vpn-instance-vpng] vpn-target 100:7
   [PE1-vpn-instance-vpng] tnl-policy select-lsp