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