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dhojgaard
Asked: 2013-06-13 13:35:21 +0800 CST

Quantum GRE or VLAN?

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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?

openstack

1 Answers

  1. 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

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