Which three pre－conditions must be met before an OSPF router can perform graceful restart? () A. Router must be an ABR.B. Router must contain one sham link.C. The network topology must be stable.D. Router must be able to forward packets.E. Neighbors must support graceful restart.
Which three pre－conditions must be met before an OSPF router can perform graceful restart? ()
A. Router must be an ABR.
B. Router must contain one sham link.
C. The network topology must be stable.
D. Router must be able to forward packets.
E. Neighbors must support graceful restart.
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