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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Installation Tasks<br />
Refer to Figure 14 when considering the tasks described in this section:<br />
Figure 15: Aggregation/core layer insertion point<br />
<strong>Data</strong> <strong>Center</strong> <strong>LAN</strong> <strong>Migration</strong> <strong>Guide</strong><br />
• If the new aggregation layer switches are part of a new POD that includes new access layer switches, the installation<br />
should be straightforward.<br />
• If the new aggregation layer switches are part of a replacement for existing legacy switches, it is important to create<br />
a fallback position in the event of any unforeseen issues. Typically, EX8200 line switches would be provisioned and<br />
deployed as a pair, replacing the legacy switches.<br />
• Once the EX8200 line switches are installed, they should be connected to the existing core layer. Again, this scenario<br />
is appropriate in cases where the organization initially will maintain its existing three-tier architecture. Appropriate<br />
IGP and EGP configurations as identified in the preinstallation configuration checklist would have been provisioned<br />
and interoperability verified by checking neighbor state and forwarding tables.<br />
• An initial access layer switch’s uplinks would then be connected to the EX8200 line switches and connectivity<br />
verified as outlined in the post installation checklist. Once this baseline is established, additional access layer<br />
switches would then be migrated to the EX8200 line.<br />
Post Installation<br />
As previously noted, procedures which are similar to those employed when installing a new aggregation switch in a<br />
single vendor environment can be used, after physical installation is complete, to verify successful operations. As a<br />
best practice, verify:<br />
• Access to new configuration via CLI or network management tools.<br />
• Interface status for server connections and uplinks via CLI or network management tools.<br />
• L2/STP status between network tiers.<br />
• QoS consistency between network tiers.<br />
• Multicast state (if applicable).<br />
• Traffic passing via ping tests.<br />
EX8200<br />
EX8216<br />
“West”<br />
EX8200<br />
EX8216<br />
“East”<br />
Legacy Switch “West” Legacy Switch “East”<br />
Legacy Aggregation<br />
Layer Switches and<br />
Security Applicances<br />
Legacy Access Layer<br />
• Application connectivity and flows with statistics or end user tests (or both).<br />
Copyright © 2012, <strong>Juniper</strong> <strong>Networks</strong>, Inc. 43