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PCE Communications Protocol Requirements PCC-PCE & PCE-PCE path request message MUST support carrying various constraints including (but not limited to): resources (links/nodes), resource affinities & SRLGs to use/avoid exclusions unsorted list of links/nodes/SRLGs that must not appear in the resulting path(s) inclusions sorted list of links/nodes that must appear in resulting path(s) in specified order strict & loose inclusions specify if additional links can appear in resulting path(s) sharables unsorted list of links that must not be excluded in resulting path(s) because of insufficient resources switching type, encoding type, GPID switching capabilities to be included/excluded from the path carrying multiple requests, correlated or not |