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