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Surfing Internet & SSH connectoin on (to) cloud instance of Fedora 20 or Ubuntu 13.10 via Neutron GRE

When you meet the first time with GRE tunnelling you have to understand that GRE encapsulation requires 24 bytes and a lot of problems raise up , view http://www.cisco.com/en/US/tech/tk827/tk369/technologies_tech_note09186a0080093f1f.shtml In particular, Two Node (Controller+Compute) RDO Havana cluster on Fedora 20 hosts been built by myself per guidelines from http://kashyapc.wordpress.com/2013/11/23/neutron-configs-for-a-two-node-openstack-havana-setup-on-fedora-20/ was Neutron GRE cluster. Hence, for any instance has been setup (Fedora or Ubuntu) problem with network communication raises up immediately. Apt-get update just refuse to work on Ubuntu Salamander Server instance (default MTU value for Ethernet interface is 1500).

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