ACI transit L2 forwarding

[hamed1900]

H Guys,

How can I use ACI to be a transit for Layer 2 traffic in migration scenario? Can the same EPG L2OUT be on two different leaf switches, if so does the traffic transits the ACI ( getting to ACI from one end and going out to the other side)

Thanks,

Hamed

[RedNectar · Accepted solution]

Hi Hamed,

Very simple answer - Yes!

But in more detail:

How can I use ACI to be a transit for Layer 2 traffic in migration scenario?

You can simply map VLAN IDs to Application EPGs, or, as you suggested, map VLANs to L2 Out EPGs (Bridged Outside Networks)

Can the same EPG L2OUT be on two different leaf switches, if so does the traffic transits the ACI (getting to ACI from one end and going out to the other side)

Yes. You no matter which method you use, you will need to map VLANs on particular ports on each leaf switch.  Once that is done, traffic within VLANs/EPGs will be flowing.  

Just remember that if you are connecting both leaf switches to external switches:

1. Using VPCs is by far the best way to connect the external switches
2. ACI will pass BPDUs through the fabric, so you could end up with blocked ports on your external switches if you are not careful.

I hope this helps

RedNectar
aka Chris Welsh

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