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Cisco Bug: CSCvu43056 - Virtual Edge performs HREP for broadcast from uplink if only one EP is in EPG on destination host

Last Modified

Sep 10, 2020

Products (1)

  • Cisco Application Policy Infrastructure Controller (APIC)

Known Affected Releases

2.2(3b)

Description (partial)

Symptom:
- Broadcast packet being re-routed to fabric Leaf by VM that with ip forwarding enabled
- IP learnt behind incorrect endpoint in same BD

Conditions:
- Multi-Destination Flooding set to "Flood in BD"
- Endpoint A in EPG1 sending L2 broadcast frame with L3 broadcast destination (e.g. NetBIOS on Windows VMs)
- Endpoint B in EPG2 has routing enabled (e.g. Docker VM)

In versions with fix for CSCvg31917 we also need the following condition:
- Endpoint B is the only endpoint in EPG2 on destination host
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  • Status
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