IS-IS on FRR - Is Anyone Running It?

Mark Tinka mark.tinka at seacom.mu
Mon Apr 6 12:10:08 UTC 2020


On 6/Apr/20 12:57, Dale Shaw wrote:

>
> Since vsphere67u3 (ESXi 6.7 U3), you can set an MTU of up to 9,190 bytes:

So we moved from 6.0 to 6.7 last year, when we refreshed the servers.

Not sure why they hid the fact that they can breach the 9,000 mark:

   
https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.storage.doc/GUID-D05444F8-8C34-43CD-93D0-5F3C2369DE01.html
   
https://docs.vmware.com/en/VMware-vSphere/6.7/com.vmware.vsphere.networking.doc/GUID-40856C1E-7631-4228-A111-13A783316595.html



> The host UI doesn't let you go >9000 bytes so (for now) you need to
> use the CLI.

Yeaaaaah... RR's are critical infrastructure. I'd prefer not to mess
with them beyond what is necessary :-).


>
> Are your FRR VM vNICs attached to standard or distributed vswitch port
> groups?

So we only worry about this on our RR's.

Other VM's that may be running are not a huge concern.

Despite our network being able to carry 9,192 bytes, we only guarantee
9,000 for services and customers, end-to-end. Same applies to internal
services we operate.

Mark.




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