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Gradiant / 5g-charts

Helm charts for 5G Technologies
Apache License 2.0
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SCTP does not establish connections between pods on different nodes. #137

Closed mandrade1stf closed 10 months ago

mandrade1stf commented 10 months ago

I have an experiment running with Open5GS that works perfectly with Flannel; however, when I switch to Cilium, I can no longer establish a connection between the eight Ueransim pods and the AMF using SCTP. I noticed that UERANSIM and AMF work when they are on the same node, but they do not function when on different nodes.

flowchart TB
    subgraph node1
        direction LR
        ueransim02
        ueransim03
        ueransim04
    end
     subgraph node2
        direction LR
        ueransim05
        ueransim06
        ueransim07
        ueransim08
    end
    subgraph node3
        direction LR
        ueransim01 
        amf
    end
    ueransim01 == OK ==> amf
    ueransim02 -.-> amf
    ueransim03 -.-> amf
    ueransim04 -.-> amf
    ueransim05 -.-> amf
    ueransim06 -.-> amf
    ueransim07 -.-> amf
    ueransim08 -.-> amf
    linkStyle 1,2,3,4,5,6,7 stroke:red,color:red;
    linkStyle 0 stroke:green;
cgiraldo commented 10 months ago

From your description, It seems to be a bug related with cillium and not the open5gs chart.

I check SCTP support in cilium and It is beta, It has to be enabled when installing it. Check the Cilium SCTP Limitations and warnings if it gives you more information.