An engineer is considering time of convergence in a new Layer 3 environment design. Which two attribute must be considered? (Choose two.)

Question

Options

• AOSPF database updates
• Baddition of a valid forwarding path
• Cforwarding table updates
• Dloss of a valid forwarding path
• ESPT timer updates

• A
  4% (2)
• B
  6% (3)
• C
  78% (40)
• E
  12% (6)

Explanation

Network convergence time in a Layer 3 environment is defined as the time from a topology change event to the point where all routers have a consistent, accurate view of the network and all forwarding tables are updated. Two critical attributes are: (C) Forwarding table updates - after routing protocol reconvergence, the updated routes must be programmed into the hardware FIB (Forwarding Information Base); the speed of this process directly impacts when traffic is actually forwarded correctly. (D) Loss of a valid forwarding path - detecting that a path has gone down is what triggers reconvergence; faster detection (via BFD, reduced hello timers, etc.) leads to faster overall convergence. Option A (OSPF database updates) is part of the internal OSPF process but is an intermediate step, not the primary convergence metric. Option B (addition of a path) is recovery, not the convergence trigger. Option E (SPT timer updates) refers to Spanning Tree, not Layer 3 convergence.

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