How Tenant traffic separation happens in GRE

asked 2015-04-29 22:20:55 -0600

rvarghese gravatar image

Hello Stackers,

I would like to have an in depth view on how the tenant isolation is achieved in Openstack with a GRE/VXLAN overlay. Any good document/links are welcome

  1. How each tenants traffic is differentiated in the tunnel?
  2. Is there any limitation in 4096 vlans?

Thanks Ravargs

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answered 2015-04-30 01:04:35 -0600

dbaxps gravatar image

updated 2015-04-30 01:16:54 -0600

View :-
GRE (VXLAN) segmentation ID is unique for ech tenant

No 4096 limit, due to tags are not real VLAN tags as 12-bit segment packets headers transmitted  via switch from Compute to Network Nodes. Tags used by GRE are only locally valuable to separate packets at br-int. As I wrote GRE(VXLAN)  segmentation ID identifies globally tenant's network.

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Asked: 2015-04-29 22:20:55 -0600

Seen: 251 times

Last updated: Apr 30 '15