PDUSessionSuccess.pcap (27.1 KB) 0113UPDlog.docx (21.6 KB)
With many helps from the forum ,We have the right procedure with commercial RAN, but we test from the RAN, N3 seems link failure. We test GTPU request (echo request) but with no response. Is there any experience to share ? Thanks !
ping is ok from each other
@chengjiaming1987 Hi,
I think you say that N3 seems link failure means UPF N3 Uplink didn’t receive packets from UE.
Please check following :
-
Use
sysctl -a | grep forward
check if net.ipv4.ip_forward is set to 1
To solve this problem:sysctl -w net.ipv4.ip_forward=1
-
Check whether the rules or policy in
iptables -nvL FORWARD
block the UE packet.
To solve this problem:iptables -I FORWARD 1 -j ACCEPT
-
Check whether the PCFP rules are true or not ?
Use the tool inupdk/src/third_party/libgtp5gnl/tools/
Enter./gtp5g-tunnel list pdr
to check pdr rules
Enter./gtp5g-tunnel list far
to check far rules
Hi,
PCAP does not show UEContextSetupRequest from CU to DU.