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300-320 · Question #523

A company has 30 sites and wants allow dynamic IGP protocol, multicast and non IP traffic between sites. Which topology should the company implement?

The correct answer is D. p2p gre. Point-to-Point GRE (Generic Routing Encapsulation) is the only option that natively supports all three requirements: dynamic IGP routing protocols, multicast, and non-IP traffic. GRE can encapsulate any Layer 3 protocol, including IPX and other non-IP traffic. DMVPN (both…

Advanced WAN Services

Question

A company has 30 sites and wants allow dynamic IGP protocol, multicast and non IP traffic between sites. Which topology should the company implement?

Options

  • Admvpn spoke-to-spoke
  • Bdmvpn hub-to-spoke
  • Cvti
  • Dp2p gre

How the community answered

(54 responses)
  • A
    4% (2)
  • B
    9% (5)
  • C
    22% (12)
  • D
    65% (35)

Explanation

Point-to-Point GRE (Generic Routing Encapsulation) is the only option that natively supports all three requirements: dynamic IGP routing protocols, multicast, and non-IP traffic. GRE can encapsulate any Layer 3 protocol, including IPX and other non-IP traffic. DMVPN (both hub-to-spoke and spoke-to-spoke) uses mGRE and supports dynamic routing and multicast, but has limitations with non-IP protocols. VTI (Virtual Tunnel Interface) is IP-only and does not support non-IP traffic. P2P GRE satisfies all three stated requirements.

Topics

#GRE tunnel#multicast over WAN#non-IP traffic#site interconnect

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