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JN0-649 · Question #192

Referring to the exhibit, which statement is correct when a failure exists on the link between host2 and switch5 on this EVPN-VXLAN fabric?

The correct answer is C. The switch5 device will send a Type 1 route to all peers. Type 1 routes are used for per-ES auto-discovery (A-D) to advertise EVPN multi-homing mode. Remote ToR leaf devices in the EVPN network use the EVPN Type 1 route type functionality to learn the EVPN Type 2 MAC routes from other leaf devices. In this route type ESI and the…

EVPN-VXLAN

Question

Referring to the exhibit, which statement is correct when a failure exists on the link between host2 and switch5 on this EVPN-VXLAN fabric?

Exhibit

JN0-649 question #192 exhibit

Options

  • AThe switch5 device will send a Type 2 route to all peers.
  • BThe switch5 device will send a Type 4 route to all peers.
  • CThe switch5 device will send a Type 1 route to all peers.
  • DThe switch5 device will send a Type 3 route to all peers.

How the community answered

(30 responses)
  • A
    3% (1)
  • B
    10% (3)
  • C
    73% (22)
  • D
    13% (4)

Explanation

Type 1 routes are used for per-ES auto-discovery (A-D) to advertise EVPN multi-homing mode. Remote ToR leaf devices in the EVPN network use the EVPN Type 1 route type functionality to learn the EVPN Type 2 MAC routes from other leaf devices. In this route type ESI and the Ethernet Tag ID are considered to be part of the prefix in the NLRI. Upon a link failure between ToR leaf and end server VTEP withdraws Ethernet Auto-Discovery routes (Type 1) per ES. The Juniper EVPN multi-homing Ethernet Tag value is set to the VLAN ID for ES auto-discovery/ES Mass Withdrawal - Used for fast convergence during link failure scenarios between leaf devices to the end server using Type 1 EAD/ES routes.

Topics

#EVPN route types#Type 1 route#Ethernet Auto-Discovery#link failure

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