Data Center LAN Migration Guide - Juniper Networks
Data Center LAN Migration Guide - Juniper Networks
Data Center LAN Migration Guide - Juniper Networks
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<strong>Data</strong> <strong>Center</strong> <strong>LAN</strong> <strong>Migration</strong> <strong>Guide</strong><br />
Switching across data centers using VPLS is depicted below in Figure 17.<br />
M Series<br />
MX Series<br />
Virtual Chassis<br />
EX4200 EX4500<br />
Apps Apps<br />
V<strong>LAN</strong> 10 V<strong>LAN</strong> 20<br />
Six Process Steps for Migrating to MPLS<br />
Figure 18: Switching across data centers using VPLS<br />
The following approach using a phased series of steps is one we have found useful in many enterprises. However, there<br />
may be specific circumstances which could dictate a different approach in a given case.<br />
Step 1: Upgrade the IP network to MPLS-capable platforms, yet continue to run it as an IP network. In step one,<br />
upgrade the routers connecting the data centers to routers capable of running MPLS, yet configure the network as an IP<br />
network without MPLS. Use this time to verify a stable and properly performing inter data center connection. This will<br />
provide the opportunity to have the MPLS network in place and to be sure routers are configured and working correctly<br />
to support IP connectivity. If you’re presently running Extended IGRP (EIGRP), use this opportunity to migrate to OSPF<br />
or one of the other L3 protocols that will perform better with MPLS. Depending upon how many data centers will be<br />
inter connected, once you’ve migrated to OSPF and/or IS-IS, it is a good time to enable BGP as well. BGP can be used<br />
for automatic MPLS label distribution. <strong>Juniper</strong> has multiple sources of design guidelines and practical techniques for<br />
accomplishing these tasks, which can be delivered in either document-based or engineering professional services<br />
modes. Please refer to the Additional Resources sections in Chapter 5 for specific URLs.<br />
50 Copyright © 2012, <strong>Juniper</strong> <strong>Networks</strong>, Inc.<br />
CORE<br />
M Series<br />
MX Series<br />
Virtual Chassis<br />
EX4200 EX4500<br />
Apps Apps<br />
Mirroring V<strong>LAN</strong> 10 Mirroring V<strong>LAN</strong> 20<br />
DATA CENTER 1 DATA CENTER 2