1

I am researching OpenStack Quantum with Open vSwitch, and am wondering if someone can answer this question for me:

When should I choose GRE or VLAN for the networking and what pros and cons will i have in using one of them compared to the other?

Seth
  • 57,282
  • 43
  • 144
  • 200
dhojgaard
  • 1,107
  • 5
  • 19
  • 34

1 Answers1

0

I have an instance running folsom + quantum with gre. If we talk about pros and cons both are good and reliable, I will share why i used gre.

  1. for me it was more handy to use gre as I don't want to configure vlans on my physical switches.

  2. VLAN mode has limitations over number of vlans we can use which will increase when you use gre , I don't remember the exact number right now.

  3. It is not much impacting the way vm's communicate, it is just encapsulating the traffic before sending it over the link

user168209
  • 1
  • But GRE is not very secure right? If i have a Cloud with several customers will they be able to interfere with each other if I use GRE for the networking? – dhojgaard Jun 18 '13 at 12:36