Quantum GRE or VLAN?

Asked Jun 12 '13 at 21:35

Active Jun 18 '13 at 10:42

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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?

edited Jun 12 '13 at 23:27

Seth

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asked Jun 12 '13 at 21:35

dhojgaard

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1 Answers1

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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.

for me it was more handy to use gre as I don't want to configure vlans on my physical switches.
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.
It is not much impacting the way vm's communicate, it is just encapsulating the traffic before sending it over the link

answered Jun 18 '13 at 10:42

user168209

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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