topic MTU from DC to branch in VMware NSX Discussions

MTU from DC to branch

vmb01 — Mon, 10 Oct 2022 13:06:40 GMT

A customer has a main DC and 9 branches . He would like to install NSX-T to have the same L2 segment in all the branches. The question is: does he nedd a 1600 MTU from the main DC to the branches and frome branch to branch ?

Re: MTU from DC to branch

ssanthoshkum — Tue, 11 Oct 2022 03:19:50 GMT

Hi ,

Are you planning to use L2VPN for extending the segment across all branches?. Kindly clarify which method you are planning to configure.

HTH

Sandy

Re: MTU from DC to branch

vmb01 — Tue, 11 Oct 2022 06:54:35 GMT

the customer would like to use a L2 segment not a L2 VPN so the network traffic will be incapsulated from the TEP in the main DC and will be decapsulated from the TEP in the branch.

Re: MTU from DC to branch

ShahabKhan — Tue, 11 Oct 2022 08:10:42 GMT

Hi,

To use overlay, yes you should have a MTU of 1600 or more. Secondly, you have to consider latency between the main DC & the branch as well. Do you. know what is the RTT between the DC & branch offices?

Re: MTU from DC to branch

vmb01 — Tue, 11 Oct 2022 09:01:00 GMT

Hi, I don't know about the RTT latency but which is the maximum latency tolerated?

Re: MTU from DC to branch

ShahabKhan — Tue, 11 Oct 2022 09:11:20 GMT

Between the NSX Manager cluster & Transport nodes, it is 150ms RTT. Kindly refer the configmax for more information

https://configmax.esp.vmware.com/guest?vmwareproduct=VMware%20NSX&release=NSX-T%20Data%20Center%203.2.1&categories=17-0