[Bugs]UERAN container ping failed

[minziran]

I added the iptables command mentioned in https://githubmemory.com/repo/free5gc/free5gc-compose/issues/26?page=1

The ping still failed.

Thank you for your time and help!

[j13tw]

Hi @minziran
I think you should pre checked the UE can ping the free5gc UPF IP
and command the tcpdump command to check GTP-U Packet

# tcpdump on UPF / gNodeB check GTP-U Packet Send / Receive
tcpdump -i any port 2152

If it can send the ICMP to UPF
Maybe you are not create the NAT Forwarding rule on free5gc UPF
Try the command in your free5gc UPF netns

# Check NAT Rule
iptables -t nat -vL
# Create NAT Rule to Forwarding to DN
iptables -t nat -A POSTROUTING -o <NIC-Name> -j MASQUERADE

By the way, the UERANSIM v3.1.0 has some issue
like the gNodeB shutdown, UE MTU size too large
In my test , UERANSIM stable version is on v3.1.2 / v3.1.4 on free5gc stage v3.0.4

[free5gc-org]

@minziran

You already reported the same issue on free5gc-compose: free5gc/free5gc-compose#32 and there are some responses there.
We think this is environment setup issue. So we'll close this issue.

[minziran]

Hi @minziran
I think you should pre checked the UE can ping the free5gc UPF IP
and command the tcpdump command to check GTP-U Packet

# tcpdump on UPF / gNodeB check GTP-U Packet Send / Receive
tcpdump -i any port 2152

If it can send the ICMP to UPF
Maybe you are not create the NAT Forwarding rule on free5gc UPF
Try the command in your free5gc UPF netns

# Check NAT Rule
iptables -t nat -vL
# Create NAT Rule to Forwarding to DN
iptables -t nat -A POSTROUTING -o <NIC-Name> -j MASQUERADE

By the way, the UERANSIM v3.1.0 has some issue
like the gNodeB shutdown, UE MTU size too large
In my test , UERANSIM stable version is on v3.1.2 / v3.1.4 on free5gc stage v3.0.4

Thank you so much! I upgrade the UERANSIM and it works.

[minziran]

@minziran

You already reported the same issue on free5gc-compose: free5gc/free5gc-compose#32 and there are some responses there.
We think this is environment setup issue. So we'll close this issue.

Thanks!