JN0-683 · Question #20
Why is a designated forwarder required in a multihomed CE-to-PE VXLAN environment using EVPN signalling?
The correct answer is D. The designated forwarder is required to prevent duplicate packets from being received on. The designated forwarder is required to prevent duplicate packets from being received on multihomed hosts: In a multihomed CE-to-PE VXLAN environment using EVPN signaling, a host may be connected to more than one PE. Without a designated forwarder, both PEs could forward the…
Question
Why is a designated forwarder required in a multihomed CE-to-PE VXLAN environment using EVPN signalling?
Options
- AThe designated forwarder is required to prevent packets from looping between the PEs.
- BThe designated forwarder is required to prevent flooding of MAC addresses to multihomed hosts.
- CThe designated forwarder is required to prevent a traffic storm from being received on
- DThe designated forwarder is required to prevent duplicate packets from being received on
How the community answered
(25 responses)- A8% (2)
- B4% (1)
- C4% (1)
- D84% (21)
Explanation
The designated forwarder is required to prevent duplicate packets from being received on multihomed hosts: In a multihomed CE-to-PE VXLAN environment using EVPN signaling, a host may be connected to more than one PE. Without a designated forwarder, both PEs could forward the same broadcast, multicast, or unicast traffic to the multihomed host, leading to duplicate packets. The designated forwarder ensures that only one PE forwards traffic to the host, preventing this issue.
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