B------C\
/ | | \
/ | | \
A | | \D
\ | | /
\ | | /
\ F ------E/
In the topology ,every edge represent tow links with different weights when link between E-D fails(D-E not fail)
the convergence procedure as follows:
OSPF LISF
Time Events
step 1 0s Failure of link E-D A-F-E-drop
step 2 0.05s D,E: failure detected A-F-E-drop
step 3 0.15s C,F: failure notified A-F-E-drop
step 4 0.25s A,B: failure notified A-F-E-drop
step 5 0.35s B: route update A-F-E-drop
step 6 0.45s D,E: route update A-F-E-F-...(loop)
step 7 0.55s C,F: route update A-F-B-C-D
step 8 0.65s A: route update A-B-C-D
I can not understant step 5->step 8 ,why B first update? A last?
Thanks for answering
Yours sincerely
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