leaf
Syntax
leaf {
deterministic-ar-policy [ deterministic-ar-policy-name ... ];
replicator-activation-delay seconds;
}
Hierarchy Level
[edit logical-systems name routing-instances name protocols evpn assisted-replication], [edit routing-instances name protocols evpn assisted-replication], [edit protocols evpn assisted-replication]
Description
Configure a device in an EVPN network into the assisted replication (AR) leaf role. AR leaf devices might also be called AR client devices.
AR helps to optimize broadcast, unknown unicast, and multicast (BUM) traffic in EVPN networks. To enable AR, you configure devices in the EVPN network to operate as AR replicator and AR leaf devices.
AR replicator devices help perform BUM traffic replication and forwarding tasks for AR leaf devices. When a leaf device receives BUM traffic, by default is uses ingress replication to replicate the traffic into the EVPN core. When you configure a device as an AR leaf device, the device forwards the traffic on an AR tunnel to an AR replicator device that can better handle the replication load. The AR replicator device then replicates and forwards the traffic to other overlay tunnels. You configure a secondary loopback interface IP address on each AR replicator device for the AR tunnel.
You can configure multiple AR replicator devices in an EVPN network. In that case, AR leaf devices load-balance among the available AR replicator devices as follows:
- AR leaf devices use the following platform-specific load balancing methods by
default (see Default AR Leaf Load-Balancing When Detecting Multiple AR Replicators):
-
AR leaf devices that are EX4650 switches or switches in the QFX5000 line automatically designate a particular AR replicator device for a VLAN or VXLAN network identifier (VNI) to load-balance among the available AR replicators.
-
AR leaf devices in the QFX10000 line of switches actively load-balance among the available AR replicators based on traffic flow levels within a VLAN or VNI.
-
-
Supported AR leaf devices in the QFX5000 line can steer particular multicast flows to specified preferred AR replicators if you explicitly configure deterministic AR replicator routing policies and assign those policies to an EVPN instance on the AR leaf device. (See Deterministic Load Balancing and Traffic Steering to AR Replicators.)
Options
| replicator-activation-delay |
Interval (in seconds) to wait after receiving an AR replicator route from an AR replicator before starting to forward traffic to it. You might want to adjust the delay to make sure AR replicator devices have fully learned the current EVPN state from the network after an AR replicator goes down and comes back up again.
|
The remaining statements are explained separately. Click on a statement link in the Syntax section, or see CLI Explorer.
Required Privilege Level
routing
Release Information
Statement introduced in Junos OS Release 18.4R2 and 19.4R1.
deterministic-ar-policy option added in Junos OS Release 23.4R2.