In an EVPN operation how does the PE determine and advertise Ethernet segment reachability?

Question

Options

• AThe PE discovers and shares routing information for the B-MAC addresses associated with local
• BThe PE discovers remote ESIs and determines their redundancy mode.
• CThe PE discovers the remote PEs in the EVI and builds a flood list linked with the EVI.
• DThe PE discovers other PEs in the same Ethernet segment and elects a DF.

• A
  3% (1)
• B
  94% (31)
• C
  3% (1)

Explanation

At startup, PEs exchange EVPN routes in order to advertise the following: ===VPN membership===: The PE discovers all remote PE members of a given EVI. In the case of a multicast ingress replication model, this information is used to build the PEs flood list associated with an EVI. BUM labels and unicast labels are exchanged when MAC addresses are learned. ===Ethernet segment reachability===: In multihoming scenarios, the PE auto-discovers remote PE and their corresponding redundancy mode (all-active or single-active). In case of segment failures, PEs withdraw the routes used at this stage in order to trigger fast convergence by signaling a MAC mass withdrawal on remote ===Redundancy Group membership===: PEs connected to the same Ethernet segment (multihoming) automatically discover each other and elect a Designated Forwarder (DF) that is responsible for forwarding Broadcast, Unknown unicast and Multicast (BUM) traffic for a given EVI.

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