4000 Router Series MPLS Configuration Guide

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Preferred tunnel and tunnel selection order

configuration example

Network requirements

PE 1 has multiple tunnels to reach PE 2: two MPLS TE tunnels on the interface Tunnel1 and Tunnel3, one

GRE tunnel on the interface Tunnel2, and one LDP LSP tunnel.

PE 1 has multiple MPLS VPN instances: vpna, vpnb, vpnc, vpnd, vpne, vpnf, and vpng. Table 2 sh

ows

the tunnel policy that PE 1 uses for each VPN instance.

Table 2 Tunnel policies used for VPN instances

VPN instance Tunnel

olic

vpna, vpnb Use MPLS TE tunnel Tunnel1 as the preferred tunnel.

vpnc, vpnd Use MPLS TE tunnel Tunnel3 as the preferred tunnel.

vpne, vpnf Use GRE tunnel Tunnel2 as the preferred tunnel.

vpng Uses one tunnel selected in LDP LSP-GRE-MPLS TE order.

Configuration procedure

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, and configure the policy to select only one tunnel in LDP

LSP-GRE-MPLS TE order.

[PE1] tunnel-policy select-lsp

[PE1-tunnel-policy-select-lsp] select-seq lsp gre cr-lsp

[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