Thomas Kunz
Systems and Computer Engineering
44
Route Error
nWhen node X is unable to forward packet P (from node S to node D) on link (X,Y), it generates a RERR
message
nNode X increments the destination sequence number for D cached at node X
nThe incremented sequence number N is included
in the RERR
nWhen node S receives the RERR, it initiates a new route discovery for D using destination sequence number at
least as large as N
nWhen node D receives the route request with destination sequence number N, node D will set its sequence number to N, unless it is already larger than N