Hi Govind, I'm NOT one of the GTPu maintainers, but I do work on a UPF implementation based on VPP.
The GTPu plugin is IMHO mostly useless and broken by design in its current state. It assumes that TEIDs are symmetric which they never are in real 3GPP settings. There is an outdated change in gerrit (https://gerrit.fd.io/r/c/vpp/+/13134 ) that corrects that and other deficits. AFAIK there is no GTP-C control interface that can control the GTP-U plugin through VPPs binaries API. Only static tunnels through the CLI are doable (I have not tested that myself). A real PGW/GGSN is therefore not doable. The plugin also has no support for 3GPP compliant charging and QoS. This would be a major problem in case you want to evaluate performance as those areas are the ones that introduce the highest complexity. Performance tests on pure GTP encap/decap are IMHO useless for real world GTP use cases. Regards, Andreas Am Di., 26. Mai 2020 um 05:18 Uhr schrieb Govindarajan Mohandoss < govindarajan.mohand...@arm.com>: > Dear GTPu Owners, > > I need some help in creating GTPu Origination and Termination config in > DUT (Running VPP) as described below. > > > > GTPu Origination: > > > > > > GTPu Termination: > > > > Whether GTPu plugin has the support to do such mapping (or) I need to > write a test plugin to do such mapping ? > > > > I found some information in the below link explaining about GTPu > Tunneling. > > https://wiki.fd.io/view/VPP/Per-feature_Notes#VRF.2C_Table_Ids_and_Routing > > As per the example, foll. are the VPP CLI commands to create a GTPu > Tunnel. But I don’t follow the commands. Please see inline. > > > > “ > > loop create > > set int state loop0 up > > set int ip addr loop0 1.1.1.1/32 << Can the IP address be created on a > physical interface connecting the next node in GTPu Origination Topology > mentioned above ? > > create gtpu tunnel src 1.1.1.1 dst 10.6.6.6 teid 1111 decap-next ip4 << > What does “decap-next” mean ? > > set int ip addr gptu_tunnel0 1.1.1.2/31 << Why the IP address is assigned > to GTPu Tunnel interface ? > > “ > > > > For the GTPu origination case: > > How can I associate the incoming Ethernet traffic to GTPu Tunnel config ? > > > > It will be great if you can share some document / CLI config (or) test > case which is similar to Origination & Termination topology. > > > > Thanks > > Govind > > -- Andreas Schultz
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