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Note: Whenever possible, use IS-IS IGP shortcuts instead of traffic engineering shortcuts. |
To help provide traffic engineering and MPLS with information about network topology and loading, extensions have been added to the JUNOS implementation of IS-IS. Specifically, IS-IS supports new TLVs that specify link attributes. These TLVs are included in the IS-IS link-state PDUs. The link-attribute information is used to populate the Traffic Engineering Database (TED), which is used by the Constrained Shortest Path First (CSPF) algorithm to compute the paths that MPLS LSPs take. This path information is used by RSVP to set up LSPs and reserve bandwidth for them.
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Note: Whenever possible, use IS-IS IGP shortcuts instead of traffic engineering shortcuts. |
The traffic engineering extensions are defined in Internet draft draft-isis-traffic-traffic-02, IS-IS Extensions for Traffic Engineering.
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