The MPLS E2E recovery is based on switching the affected traffic to a different end to end {HEAD ~ backup path}, which is {TAIL ~ node disjoint} with the original path 
The MPLS E2E recovery is based on switching the affected traffic to a different end to end { HEAD ~ backup path } , which is { TAIL ~ node disjoint } with the original path
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH