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Tunnel Layer and Layer 3 Routing Interaction

Modifications to the network model (e.g. tunnels, demands/flows, network elements, design options) usually require tunnels or flows to be rerouted. In NorthStar Planner, this rerouting occurs in the following order:

  • If you are in Layer 3 and a reroute is triggered, tunnels will be rerouted first, followed by demands/flows.

  • If you are in Tunnel Layer and a reroute is triggered, then only tunnels will be rerouted while in Tunnel layer. The moment you switch into Layer 3, however, the Layer 3 demands/flows will then be rerouted.

Additional Information

Table 1: Commands Modeled Using Affinity and Mask Feature

Corresponding Cisco Commands

Setting link attributes

mpls traffic-eng attribute-flags attributes

Setting tunnel affinity and mask

tunnel mpls traffic-eng affinity affinity [ mask mask ]


Corresponding Juniper Commands for the mpls protocol




admin-groups {

group-name 1;

group-name 2;



Selecting admin groups for a link

interface interface name {

admin-group [ group-name group-name ... ];


Setting admin groups for a tunnel

label-switched-path lsp-path-name {

to address;


primary path-name {

admin-group {

exclude [ group-name group-name ... ];

include [ group-name group-name ... ];

include-all [ group-name group-name ... ];

include-any [ group-name group-name ... ];