[Idr] New draft - Flowspec Path Redirect

["VAN DE VELDE, Gunter (Gunter)" <[e-mail]>]

Hi Folks,

We have created a new draft to allow the capability to have Flowspec signal a redirect to tunnel/LSP.

https://tools.ietf.org/html/draft-vandevelde-idr-flowspec-path-redirect-00

The base principle is to use the indirection capability of BGP for path redirection.

This proposal defines a new flowspec community to signal a redirect ‘path-id’. This path-id is is either a 128bit or 32bit value
Assumed is that recipient router supporting path-id redirect have a localised path-id indexed table containing LSP/tunnel encapsulation information.
Existing technology can be used to construct/create this table (LDP, SR, RSVP, manual-config, etc…) on a recipient router. The LSP/tunnel encap table is indexed using 32 or 128 bit values.

Flowspec path-id community is used to activate a redirect LSP/tunnel and provide by indirection the LSP/tunnel information for the flowspec identified traffic towards the LSP/tunnel.

Benefits:

  *   no need for signalling labels or extra encap in BGP
  *   Each path-id indexed LSP/tunnel table is a localised construct
  *   existing technology is used to construct the path-id indexed localised table
  *   Compatibility with technologies already using 32 or 128 bit identifiers for paths and sessions
  *   Easy for flow spec to signal as it introduces no need to signal labels etc… no conflicts with existing label exchange technologies

Feedback welcome.

G/