Static Configuration of MAC-IP Bindings

You can statically configure MAC-IP bindings on a logical device. With this feature, you can bind an IP address to one or more MAC address entries to enhance network management and improve communication between infrastructure hosts. This feature is helpful particularly in internet exchange point (IXP) networks, where participant customer edge (CE) devices are:

• Widely recognized

• Static, without transitioning to other provider edge (PE) devices

You can also establish a static link between an IP address and a MAC address for a logical interface inside a bridge domain or VLAN. When you provision a static MAC-IP entry on a PE device, the PE device sends three probes in an exponential backoff pattern. The PE device sends these probes approximately every 30 seconds until the entry is learned. The probe uses an all-zero sender IP address on the configured PE device.

When the PE device configured with the MAC-IP binding responds to the probe:

1. The PE device learns the MAC-IP binding as static.

2. The probe propagates to remote PE devices through the EVPN Type 2 MAC advertisement route.

3. The remote PE device learns the MAC address of the CE device as dynamic.

If you want to deactivate the probing mechanism for learning MAC-IP bindings, you must configure the arp-nd-probe-disable statement at the [edit protocols l2-learning] hierarchy. Without probing, the PE device learns both the MAC address and the MAC-IP bindings from network traffic and uses EVPN to propagate the bindings.

Note:

If you've deployed a multihomed network, you must configure the same static MAC-IP binding on all PE devices in the corresponding ethernet segment identifier (ESI).

Note:

You can configure a maximum of eight MAC addresses for each static IP address.