[ixpmanager] Design of IXP

[Nick Hilliard (INEX)]

Nishal Goburdhan wrote on 29/05/2019 11:20:
> it is certainly possible to create virtual private network interconnects 
> (PNIs) between peers on a vlan-to-vlan basis, but this is the exception, 
> rather than the norm.

The idea of per-connection VLANs has all the disadvantages of shared 
layer 2 connectivity, but none of the advantages.  Really it is not a 
good idea.

> 9K does support sflow, but, i’m afraid i can’t offer advice on that.  

the N95K has issues with sflow, e.g. it sends ingress+egress flow 
records with no facility to send just ingress or just egress.  IXP 
Manager expects to see ingress sflow only, so if it sees ingress + 
egress, the packets will be double-counted.

Nick