Information About vPC Fabric Peering
vPC Fabric Peering provides an enhanced dual-homing access solution without the overhead of wasting physical ports for vPC Peer Link. This feature preserves all the characteristics of a traditional vPC.
The following lists the vPC Fabric Peering solution:
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vPC Fabric Peering port-channel with virtual members (tunnels).
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vPC Fabric Peering (tunnel) with removal of the physical peer link requirement.
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vPC Fabric Peering up/down events are triggered based on route updates and fabric up/down.
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Uplink tracking for extended failure coverage.
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vPC Fabric Peering reachability via the routed network, such as the spine.
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Increased resiliency of the vPC control plane over TCP-IP (CFSoIP).
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Data plane traffic over the VXLAN tunnel.
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Communication between vPC member switches uses VXLAN encapsulation.
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Failure of all uplinks on a node result in vPC ports going down on that switch. In that scenario, vPC peer takes up the primary role and forwards the traffic.
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Uplink tracking with state dependency and up/down signalization for vPCs.
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Positive uplink state tracking drives vPC primary role election.
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For border leafs and spines, there is no need for per-VRF peering since network communication uses the fabric.
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Enhance forwarding to orphans hosts by extending the VIP/PIP feature to Type-2 routes.
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Infra-VLAN is not required for vPC fabric peering.
Note |
The vPC Fabric Peering counts as three VTEPs unlike a normal vPC which counts as one VTEP. |