What does tso netstat neighbour give you?

The command TSO NETSTAT ND gave me

Query Neighbor cache for 2001:db8:1:0:8024:bff:fe45:840c 
  IntfName: IFPORTCP6          IntfType: IPAQENET6 
  LinkLayerAddr: 82240B45840C  State: Reachable 
  Type: Router                 AdvDfltRtr: No 

Query Neighbor cache for fe80::8024:bff:fe45:840c 
  IntfName: IFPORTCP6          IntfType: IPAQENET6 
  LinkLayerAddr: 82240B45840C  State: Reachable 
  Type: Router                 AdvDfltRtr: No 

Query Neighbor cache for fe80::9863:1eff:fe13:1408 
  IntfName: JFPORTCP6          IntfType: IPAQENET6 
  LinkLayerAddr: 9A631E131408  State: Reachable 
  Type: Router                 AdvDfltRtr: No 

On Linux the

ip -6 addr

command gave me

tap1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UNKNOWN qlen 1000
    inet6 2001:db8:1:0:b0fd:f92b:8362:577b/64 ...
    inet6 2001:db8:1:0:8024:bff:fe45:840c/64 ...
    inet6 fe80::8024:bff:fe45:840c/64 ...

tap2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 state UNKNOWN qlen 1000
    inet6 fe80::9863:1eff:fe13:1408/64 ...

The TSO output means

  • Query Neighbor cache for 2001:db8:1:0:8024:bff:fe45:840c. The address is one of the addresses on the remote end of the connection. There is an entry because some traffic came via the address.
  • IntfName: IFPORTCP6 The z/OS Interface name used to create the defintion
  • IntfType: IPAQENET6 the OSA-Express QDIO interfaces statement
  • LinkLayerAddr: 82240B45840C
  • State: Reachable Other options can include stale, which means z/OS has not heard anything from this address for a while
  • Type: Router
  • AdvDfltRtr: No. The information passed in the Router Advertisement, said this was connection does not Advertise a Default Router(AdvDfltRtr).

From the NETSTAT ND output we can see data has been received from

  • IFPORTCP6:2001:db8:1:0:8024:bff:fe45:840c
  • IFPORTCP6:fe80::8024:bff:fe45:840c
  • JFPORTCP6:fe80::9863:1eff:fe13:1408

To get data to flow down the 2001…. address I had to use

ping -I 2001:db8:1:0:8024:bff:fe45:840c 2001:db8:1::9

Where the -I says use the interface address.

You can get information about bytes processed by interface (not by address) using the TSO NETSTAT DEVLINKS command.

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