 |
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|
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|
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|
|
|
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| n |
if
path breaks (hello messages, link-layer
|
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|
|
acknowledgements),
upstream nodes propagate unsolicited
|
|
RREP
with higher sequence number and hop count of ¥ to
|
|
all
active upstream nodes
|
|
|
| n |
according
to protocol, these RREPs get forwarded to other
|
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|
active
nodes, eventually all active correspondents will be
|
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|
informed
of link failure
|
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|
| n |
if
needed, correspondents can start establishment of new
|
|
|
|
route
by issuing RREQ with destination sequence number
|
|
|
|
one
higher than last known sequence number
|
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|
|
– |
problem:
how to make “smart” decision as to whether route is still
|
|
|
needed?
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|
