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Month: May 2015

VPLS Unicast Flooding

VPLS Unicast Flooding

Unicast flooding problems, usually associated with switched networks, can also impact VPLS. If traffic is forwarded asymmetrically through a VPLS instance, unicast flooding of unknown frames can occur. I’ll step through a scenario where this could happen. I set a LAB up with two CSR 1000V routers acting as PE routers, providing a VPLS instance. GNS3 was used to run the IOS routers acting as CE and C routers. In this scenario we could imagine that CE3 and CE4 are…

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