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I have the openstack (microstack) environment where I have an Ubuntu Instance. Instance has both Internal and floating IP. I installed NextEPC there and bound the MME to Internal IP. I have an eNB(hardware) where I set the floating IP as MME address. But, the connectivity is not getting established between the MME and eNB. Is my configuration okay in this case? If not what should I do? I would be happy to see the expert's suggestions. N.B. eNB's and Instance's floating IPs are from same network. A lot of thanks.

Sabbir Ahmed
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  • While I know nothing about NextEPC and how communication between eNB and MME works, I assume TCP or UDP is used. If so, I suggest you first confirm that NextEPC port(s) are open in the instance's security groups. Next, check connectivity to the instance via floating IP. You could run `tcpdump` on the instance to see if traffic from the eNB arrives. Next steps depend on your findings. – berndbausch Dec 09 '20 at 04:29

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I already come up with this issue. All I needed to add an SCTP security rule in the openstack environment. The protocol between eNB and MME is SCTP.By default there is no sctp rule in the openstack security group.

Sabbir Ahmed
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