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Technical Overview

 

Juniper Networks continues to support QFabric Systems, but many of the hardware devices in QFabric Systems have reached end of life (EOL) status. The hardware used in legacy QFabric Systems—QFX3100, QFX3500, and QFX3600 series switches—does not support EVPN. The migration from a QFabric System to an IP Fabric running EVPN-VXLAN, therefore, requires the procurement of new hardware.

We recommend building your EVPN-VXLAN IP Fabric using QFX5100 or QFX5200 series switches as leaf devices and QFX10000 series switches as spine devices. While some elements of the QFabric System can be effectively re-purposed into simple device roles in the post-migration EVPN-VXLAN IP Fabric architecture, the lack of support for newer technologies in these devices increases the potential for unexpected network service issues. We strongly recommend that you evaluate all of your data center network requirements—including port density, feature support requirements, and all other needs—before selecting the switch models that best meet the needs of your EVPN-VXLAN-based data center network.

The migration procedure presented in this document uses QFX5100 switches as top-of-rack leaf devices and QFX10002 switches as spine devices. Leveraging these newer platforms brings industry leading features and functionality to the post-migration network and provides the greatest flexibility for the EVPN-VXLAN architecture.

Figure 1 illustrates the pre-migration and post-migration topologies. The server in this illustration is migrated from the legacy QFabric System on the left to the EVPN-VXLAN IP Fabric architecture on the right with minimal traffic interruption.

Figure 1: Migration Topologies
Migration
Topologies