osmocom-net-gprs July 2020

osmocom-net-gprs@lists.osmocom.org

5 participants
4 discussions

Getting "Operation Not Permitted" When Running gtp-link
by Donal Crowley 21 Jul '20

21 Jul '20

Hi all, I am running an opensource 5G Core however I cannot get my UPF up and running ads the GTP links and tunnels I am trying to create are failing with “Operation Not Permitted”. I’ll recompile again to run through GDB but would really like to hear back if you guys have seen this before on Ubuntu 18.04 (Kernel > 5) Any help would be appreciated Donal Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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Osmocom scheduled outage on *2020-07-19 9am CEST*
by Harald Welte 19 Jul '20

19 Jul '20

There is an urgent need to migrate our most important public infrastructure to a new server, and I will be doing that on *Sunday, July 19 2020*, starting about 9am CEST. The migration involves redmine (main osmocom.org website), jenkins, gerrit, git, and cgit. In theory, the migration should be quick. I would expect (significantly) less than one hour of downtime. However, we all know Murphys law. Services not affected are mail (including mailman lists), ftp, dns. So in case of doubt, we can still use mailing lists to communicate. In case anyone urgently needs osmocom source code on Sunday morning during the downtime: There are public mirrors available on github. Regards, Harald -- - Harald Welte <laforge(a)osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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Network is unreachable error for GTP interface
by avatli＠itu.edu.tr 18 Jul '20

18 Jul '20

Hi I'm trying to build a setup by using GTP module and libgtpnl tools on Centos 7 but I haven't been successful yet. Worse, I don't know how to debug the problem. I also stopped firewall and iptables. How can I debug/solve, I will be very glad if you help. dmesg or system messages show show nothing. Why is GTP interface (link) is unreachable. Thanks in advance - Volkan $ modinfo gtp filename: /lib/modules/5.7.7-1.el7.elrepo.x86_64/kernel/drivers/net/gtp.ko alias: net-pf-16-proto-16-family-gtp alias: rtnl-link-gtp description: Interface driver for GTP encapsulated traffic author: Harald Welte <hwelte(a)sysmocom.de> license: GPL srcversion: 191407DA5399304D93D62C7 depends: udp_tunnel retpoline: Y intree: Y name: gtp vermagic: 5.7.7-1.el7.elrepo.x86_64 SMP mod_unload modversions $ modinfo udp_tunnel filename: /lib/modules/5.7.7-1.el7.elrepo.x86_64/kernel/net/ipv4/udp_tunnel.ko license: GPL srcversion: 0A315BA6124B0664F4D23FB depends: retpoline: Y intree: Y name: udp_tunnel vermagic: 5.7.7-1.el7.elrepo.x86_64 SMP mod_unload modversions $ ip addr add 172.0.0.1/24 dev enp9s0 $ ip addr add 172.99.0.1/32 dev lo $ ./gtp-link add gtp1 WARNING: attaching dummy socket descriptors. Keep this process running for testing purposes. $ ./gtp-tunnel add gtp1 v1 200 100 172.99.0.2 172.0.0.2 $ ip route add 172.99.0.2/32 dev gtp1 $ ./gtp-tunnel list version 1 tei 200/100 ms_addr 172.99.0.2 sgsn_addr 172.0.0.2 $ ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet 172.99.0.1/32 scope global lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 7: enp9s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000 link/ether 08:35:71:ab:54:5f brd ff:ff:ff:ff:ff:ff inet 172.0.0.1/24 scope global enp9s0 valid_lft forever preferred_lft forever 8: gtp1: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 0 qdisc noqueue state UNKNOWN group default qlen 1000 link/none $ ip route default via 192.168.1.1 dev enp2s0 proto static metric 100 172.0.0.0/24 dev enp9s0 proto kernel scope link src 172.0.0.1 172.99.0.2 dev gtp1 scope link $ ping 172.99.0.2 PING 172.99.0.2 (172.99.0.2) 56(84) bytes of data. ping: sendmsg: Network is unreachable ping: sendmsg: Network is unreachable ping: sendmsg: Network is unreachable

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Basic testing for Kernel GTP-U is not up to date
by avatli＠itu.edu.tr 17 Jul '20

17 Jul '20

Hello I tried to follow the steps in the basic testing below but it is not up-to-date https://osmocom.org/projects/linux-kernel-gtp-u/wiki/Basic_Testing To make the setup work, I execute the GGSN on the host by using osmo-ggsn/doc/examples/osmo-ggsn.cfg. I changed the "gtp bind-ip" to 172.31.1.1, "ip prefix dynamic" to 192.168.71.0/24, "ip ifconfig" to 192.168.71.0/24 and then execute the emulated SGSN inside the sgsn namespace (ip netns exec sgsn sgsnemu -d -r 172.31.1.1 -l 172.31.1.2 --defaultroute --createif). In this case; GGSN can create PDP Context successful but there is not any GTP tunnel. How can I get the up-to-date version of this document? or how can I run the basic testing steps? Thanks in advance. - Volkan

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osmocom-net-gprs July 2020