GTP hash

                                    

From 2.9.1.3,GTP hash is supported on pica8 switch.GTP hash support ecmp-gtp-hash and lag-gtp-hash.GTP teid hash works well whatever adding a lag port or lag-select-group.But only works well when configure ecmp-select-group.The layer4 port hash fields does not work when setting with gtp_teid(ovs-vsctl set-lag-advance-hash-mapping-fields gtp_teid port_src),but works well when not set gtp_teid(ovs-vsctl set-lag-advance-hash-mapping-fields port_src).You can modify the udf dst port through this commnad "ovs-vsctl set-gtp-udp-dst-ports <portnumber>",default is 2152.After enable advance mode on lag port,all hash fields are enabled except gtp_teid.The same with the ecmp-hash-fields.

    ovs-vsctl add-port br0 te-1/1/4 vlan_mode=trunk tag=1 

    ovs-vsctl add-port br0 te-1/1/5 vlan_mode=trunk tag=1 

    ovs-vsctl add-port br0 ae1 vlan_mode=trunk tag=1 -- set interface ae1 type=pica8_lag options:members=te-1/1/4,te-1/1/5

    ovs-vsctl set interface ae1 options:hash-mapping=advance

    ovs-vsctl set-lag-advance-hash-mapping-fields gtp_teid

without matching teid

    ovs-ofctl add-flow br0 in_port=3,actions=1025

 matching teid

    ovs-vsctl set-udf-mode "udf0(l4,offset=12,length=4)"

    ovs-ofctl add-flow br0 in_port=1,table=250,udf0=0x00000000/0xfffffff0,actions=1025 
2. lag-select-group

    ovs-vsctl set-group-ranges lag-select-groups=2-20

    sudo systemctl restart picos

     ovs-vsctl set-lag-advance-hash-mapping-fields gtp_teid