Greetings,
I tried to load the STT module (vport-stt.ko), which is included with OVS 2.5 distribution, in order to configure STT overlay tunnels between virtual machines located in different hosts. However, when I insert vport-stt.ko using “insmod”: insmod datapath/linux/vport-stt.ko I got this error insmod: ERROR: could not insert module datapath/linux/vport-stt.ko: Unknown symbol in module Then I tried “modprobe vport-stt”, but I got a similar error: modprobe: ERROR: could not insert 'vport_stt': Unknown symbol in module, or unknown parameter (see dmesg) Running "dmesg tail", I got the following: [89896.077397] vport_stt: Unknown symbol ovs_netdev_link (err 0) [89896.077421] vport_stt: Unknown symbol ovs_netdev_tunnel_destroy (err 0) [89896.077425] vport_stt: disagrees about version of symbol ovs_tunnel_get_egress_info [89896.077428] vport_stt: Unknown symbol ovs_tunnel_get_egress_info (err -22) [89896.077440] vport_stt: Unknown symbol ovs_stt_dev_create_fb (err 0) [89896.077462] vport_stt: Unknown symbol __ovs_vport_ops_register (err 0) [89896.077467] vport_stt: disagrees about version of symbol ovs_vport_ops_unregister [89896.077469] vport_stt: Unknown symbol ovs_vport_ops_unregister (err -22) [89896.077474] vport_stt: disagrees about version of symbol ovs_vport_alloc [89896.077476] vport_stt: Unknown symbol ovs_vport_alloc (err -22) [89896.077479] vport_stt: disagrees about version of symbol ovs_vport_free [89896.077481] vport_stt: Unknown symbol ovs_vport_free (err -22) [89896.077494] vport_stt: Unknown symbol ovs_stt_xmit (err 0) Running "modinfo vport-stt.ko", I got: filename: /root/openvswitch-2.5.0/datapath/linux/vport-stt.ko alias: vport-type-106 license: GPL description: OVS: STT switching port rhelversion: 7.2 srcversion: 2D42FA67BB7A1A04E5E0A62 depends: openvswitch vermagic: 3.10.0-327.13.1.el7.x86_64 SMP mod_unload modversions Note, as vport-stt.ko depends on openvswitch.ko, I loaded openvswitch.ko before trying to insert vport-stt.ko, but it did not fix the problem. I was able to load the other modules such as vport-gre.ko, vport-vxlan.ko, and vport-geneve.ko, but not vport-stt.ko [root@sig-102 ~]# lsmod | grep switch openv*switch* 84543 3 vport_gre,vport_vxlan,vport_geneve libcrc32c 12644 2 xfs,openv*switch* The OVS is installed on CentOS 7.2.1511 (kernel: 3.10.0-327.13.1.el7.x86_64). Please advise me on how to tackle this *problem*, Thanks in advance, Amru
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