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Category: EVPN

Active-Active DCs Networking Problem

Active-Active DCs Networking Problem

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  Problem One interesting problem I was asked to solve from a networking aspect was: How to build an Active-Active DCs (Data Centers)? How do we ensure the ingress and egress traffic flows use the most efficient path especially around host mobility? Background Why would an organisation want Active-Active DCs? From a business point of view, we want to run everything hot and maximise our return on investment. Why should we have resources idling by for an off-chance that our…

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EVPN On Nokia 7450 Notes Part 2

EVPN On Nokia 7450 Notes Part 2

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Following from this blog post. Scenario 2: Single-active Multi-homing I updated LAG 60 to be active-standby. This required multi-homing option under ESI to change from all-active to single-active. Also LAG configuration need to be different between PE1 and PE2 as stated in the extract below from Nokia guide “LAYER 2 SERVICES AND EVPN GUIDE: VLL, VPLS, PBB, AND EVPN RELEASE 14.0.R4” I originally performed the POC without changing LAG configurations between PE1 and PE2. I observe CE1 will forward traffic to non…

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EVPN On Nokia 7450 Notes Part 1

EVPN On Nokia 7450 Notes Part 1

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Background I discovered that Nokia’s road map for MC-LAG does not include active/active. After discussion with Nokia, they suggest EVPN was the best solution to introduce this capability. So after my research  on EVPN it was time to POC it. This post assume basic knowledge of EVPN. If you would like to review EVPN, this blog post is a great starting point. Scenario 1: All-active Multi-homing In the above topology, PE1 and PE2 will  be part of an EVPN-VPLS. LAG…

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