04-02-2020 04:53 PM
Hi All,
I have a lab setup with 2 leafs and 2 spines and use VXLAN BGP EVPN. There is also a VPC peer link between the leaf devices. For some reason all traffic is being learnt via the peer link and not over the NVE interfaces, is there a reason for this is the peer link preferred over BGP?
Thanks
04-02-2020 11:10 PM - edited 04-02-2020 11:12 PM
Hi,
If the vlans are vpc vlans (allowed over peer link), in your case the local connected devices (orphan port connected to each switch) will always communicate over the peer-link.
Remember: vpc is a virtualization protocol which will make your two Nexus switches (vPC peers) to act as one from Layer 2 forwarding perspective.
This means, even the single homed devices connected devices (connected to only one single Nexus switch, on interfaces called orphan ports) will see the two switches as one:
If you want to forward traffic over vxlan, you either remove the vpc completely, either make the vlans non-vpc (remove them from vpc peer-link)
Regards,
Sergiu
04-03-2020 02:43 AM
Hi Sergiu,
Sorry are you saying only orphan ports will only use the vpc peer link? or will vpc'd attached devices also use the peer link?
Thanks
04-03-2020 03:35 AM
Hello,
There are three type of traffic:
Let me know if the explanation is not clear and I will try to make some graphic illustrations for the above the scenarios.
Cheers,
Sergiu
04-03-2020 07:18 AM
This makes perfect sense, thank you for explanation.
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