eUPF in ULCL scenario don't resolve ARP for ancor UPFs

edgecomllc / eupf

5G User Plane Function (UPF) based on eBPF

Apache License 2.0

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Closed PapaySail closed 12 months ago

PapaySail commented 1 year ago

As described in https://github.com/edgecomllc/eupf/issues/456#issuecomment-1775708888 overcome approach needed for traffic to go throught eUPF to next UPF in ULCL scenario with N9 interfaces.

we need to open eupf shell and start pinging both upf1 and upf2

pirog-spb commented 1 year ago

My proposed solution is to add GTP Path management feature. eUPF have to send GTP Echo Request to every known GTP peer.

pirog-spb commented 1 year ago

Simple GTP Path management option implemented:

Every peer should be configured to be monitored (see gtp_peer config option)
eUPF for each configured peer every echo_interval seconds send GTP Echo request and wait for an response
If no response - drop a line in log file