A Certain Service Provider Network Has IPsec Tunnels Between PE

question 614

Multiple Choice

A certain service provider network has IPsec tunnels between PE router loopbacks and dual-homed PE routers. The service provider carries infrastructure routes by use of OSPF and carries tunnel endpoints by using BGP. What should the service provider do to provide fast convergence in the event of a link failure in its network?

• A) tune OSPF on all routers
• B) carry IPsec tunnels in GRE among PE routers
• C) carry IPsec tunnels in L2TPv3 among PE routers
• D) carry IPsec tunnels in VPLS among PE routers

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