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niceguy001
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DLR control vm and vxlan relationship?

Hi guy,

I had a question about the DLR appliance and vxlan,

the official documents said the DLR appliance will only needed if using dynamic routing between DLR and ESG,

if choosing the static  routing then the DLR appliance does not have to exist.

but...what about the vxlan?

does the vxlan affect by the existence of DLR vm?(if i want to communicate between different vxlan?)

so much appreciates!

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Sreec
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does the vxlan affect by the existence of DLR vm?(if i want to communicate between different vxlan?)

Well, if you need VXLAN A to Communicate with VXLAN B - control VM is not required unless you need dynamic routing . Nothing is stopping you connecting both the VXLAN Logical Swiches to same Logical Router which is a kind of direct connection.  In the below example you can see three VXLAN networks connected directly to a NSX DLR. If you have enough compute resource you can simply deploy control-VM and keep it idle and later there is a Dynamic routing demand we can make use of the same(You cannot add an Edge appliance to the logical router after the logical router has been created)

pastedImage_0.png

Cheers,
Sree | VCIX-5X| VCAP-5X| VExpert 6x|Cisco Certified Specialist
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rajeevsrikant
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Please refer below links where this has been discussed.

https://vzealand.com/2016/10/01/vcap6-nv-3v0-643-study-guide-part-7/

DLR Control VM - Static Route

DLR control VM is  required only when you use dynamic routing protocols. If only static routes are used then DLR control VM is not required.

When you deploy DLR , you get the option to "Deploy Edge Appliance" which is required if you are planning to use Firewall & Dynamic Routing functionality.

If you dont want to use Dynamic routing, use static routes for the communication.

dlr1

If you have deployed DLR without Control VM & in future if you are planning to use dynamic routing protocol it is not possible to deploy control VM to the existing DLR.

You have to create a new DLR with Control VM.

Sreec
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does the vxlan affect by the existence of DLR vm?(if i want to communicate between different vxlan?)

Well, if you need VXLAN A to Communicate with VXLAN B - control VM is not required unless you need dynamic routing . Nothing is stopping you connecting both the VXLAN Logical Swiches to same Logical Router which is a kind of direct connection.  In the below example you can see three VXLAN networks connected directly to a NSX DLR. If you have enough compute resource you can simply deploy control-VM and keep it idle and later there is a Dynamic routing demand we can make use of the same(You cannot add an Edge appliance to the logical router after the logical router has been created)

pastedImage_0.png

Cheers,
Sree | VCIX-5X| VCAP-5X| VExpert 6x|Cisco Certified Specialist
Please KUDO helpful posts and mark the thread as solved if answered
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