Configuring EVPN Mulit-homing on the Leaf

To configure a Leaf for EVPN Multi-homing, each interface on the Leaf that is connected to a host must be configured individually. EVPN Multi-homing can be configured on Ethernet Ports and Port-Channels.

  1. Navigate into the Configuration mode. 
    SLX # conf term
SLX (config)#
  2. Navigate into the Ethernet Port or Port-channel interface 
    SLX (config)# interface ethernet 0/1
SLX (config-if-eth-0/1)#
  3. Use the ethernet-segment command to enter into the Ethernet Segment Configuration mode. 
    SLX (config-if-eth-0/1)# ethernet-segment
SLX (config-if-eth-0/1-es)#
  4. Use the esi to manually assign an Ethernet Segment Identifier (ESI) to this ES. 
    SLX (config-if-eth-0/1-es)# esi 00:11:22:33:44:55:66:77:88:99
SLX (config-if-eth-0/1-es)#
  5. Repeat for the interfaces that you need to configure as belonging to the same ES on the multi-homed peer node.
  6. For LACP port-channel interfaces, use the lacp auto command to automatically assign ESI to the interface. ES should not be configured under member links of the PO. 
    SLX (config)# interface port-channel 1
SLX (config-port-channel-1)# ethernet-segment
SLX (config-port-channel-1-es)# lacp auto

The configured interfaces are assigned the same Ethernet Segment Identifier and indicate a multi-homed host.

The following example configures a leaf node to support a multi-homed host. An ESI is then assigned to this interface. 

SLX(config)# interface Port-channel 4
SLX(config-Port-channel-1)# ethernet-segment
SLX(config-Port-channel-1-es)# lacp auto

This example displays the details of all the ESIs configured on a leaf. 

SLX # show bgp evpn ethernet-segment
ESI : 01:d8:84:66:ea:40:14:00:04:00
Interface : po4
Interface state : Up
Load balancing Mode : Active-Active
List of MH Nodes : 1.1.1.1 2.2.2.2
DF Vlans : 100 102 104 106 108 110
DF BD : 50 52 54 56 58 60
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