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example_test_guide.md

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The following is a possible way to run the tests, this is just an example

Goal: Check multi-hop connectivity over IPv6

We will arrange all 4 nodes in a chain topology: node1 <-> node2 <-> node3 <-> node4

Pre-setup Steps

  1. Book 4 iotlab M3 nodes

Task 1 and 2 Setup

  1. Open 4 instances of nodes physically close together USEMODULE=gnrc_pktbuf_cmd make -C tests/gnrc_udp/ BOARD=iotlab-m3 IOTLAB_NODE=<iotlab id> flash term
  2. On each end of the nodes add a global IP address (ie. node1:ifconfig 6 add abcd::1 and node 4: ifconfig 6 add abcd::2)
  3. Add the routing for both ways:
  • Node 1: nib route add 6 abcd::2 <ipv6 addr of node 2>
  • Node 2: nib route add 6 abcd::2 <ipv6 addr of node 3> and nib route add 6 abcd::1 <ipv6 addr of node 1>
  • Node 3: nib route add 6 abcd::2 <ipv6 addr of node 4> and nib route add 6 abcd::1 <ipv6 addr of node 2>
  • Node 4: nib route add 6 abcd::1 <ipv6 addr of node 3>
  1. Proceed to Task specific commands

Task #01 - ICMPv6 echo on iotlab-m3 with three hops (static route)

Description

ICMPv6 echo request/reply exchange between two iotlab-m3 nodes over three hops with static routes.

  1. Follow Task 1 and 2 setup
  2. Ping node 4 from node 1, Node 1:ping6 -c 100 -s 50 -i 100 abcd::2

Result

<20% packets lost on the pinging node. No leaks in the packet buffer (check with gnrc_pktbuf_cmd).

Task #02 - UDP on iotlab-m3 with three hops (static route)

Description

Sending UDP between two iotlab-m3 nodes over three hops with static routes.

  1. Follow Task 1 and 2 setup
  2. Start a udp server on node 1, Node 1:udp server start 1234
  3. Start a udp server on node 4, Node 4:udp server start 4321
  4. Send a packet to node 4 from node 1, Node 1:udp send abcd::2 4321 50 100 100000
  5. Send a packet to node 1 from node 4, Node 4:udp send abcd::1 1234 50 100 100000

Result

<10% packets lost on the pinging node. No leaks in the packet buffer (check with gnrc_pktbuf_cmd).

Task 3 and 4 Setup

  1. Flash all nodes with with the l2filter_whitelist module firmware USEMODULE="l2filter_whitelist gnrc_pktbuf_cmd" BOARD=iotlab-m3 IOTLAB_NODE=<iotlab id> make -C tests/gnrc_udp/ flash term
  2. Setup the l2filter_whitelist addresses
  • Node 1: ifconfig 6 l2filter add <MAC addr of node 2>
  • Node 2: ifconfig 6 l2filter add <MAC addr of node 1> and ifconfig 6 l2filter add <MAC addr of node 3>
  • Node 3: ifconfig 6 l2filter add <MAC addr of node 2> and ifconfig 6 l2filter add <MAC addr of node 4>
  • Node 4: ifconfig 6 l2filter add <MAC addr of node 3>
  1. Add a global IP address, Node 1: ifconfig 6 add abcd::1/64
  2. Apply rpl root, Node 1: rpl root 0 abcd::1
  3. Check Node 4 for R >= 1024 indicating more at least 3 hops, Node 4:
> rpl
rpl
instance table: [X]
parent table:   [X]     [ ]     [ ]

instance [0 | Iface: 6 | mop: 2 | ocp: 0 | mhri: 256 | mri 0]
        dodag [abca::1 | R: 1024 | OP: Router | PIO: on | TR(I=[8,20], k=10, c=1, TC=14s)]
                parent [addr: fe80::1711:6b10:65fa:5c0a | rank: 768]

Task #03 - ICMPv6 echo on iotlab-m3 with three hops (RPL route)

Description

ICMPv6 echo request/reply exchange between two iotlab-m3 nodes over three hops with RPL generated routes.

  1. Follow Task 3 and 4 setup
  2. Ping root node from other node, Node 4:ping6 -c 100 -s 50 -i 100 abcd::1

Result

<20% packets lost on the pinging node. No leaks in the packet buffer (check with gnrc_pktbuf_cmd).

Task #04 - UDP on iotlab-m3 with three hops (RPL route)

Description

Sending UDP between two iotlab-m3 nodes over three hops with RPL generated routes.

  1. Follow Task 3 and 4 setup
  2. Start a udp server on root node, Node 1:udp server start 1234
  3. Start a udp server on the other node, Node 4:udp server start 4321
  4. Send a packet to the other node from the root node, Node 1:udp send abcd::<other node global address> 4321 50 100 100000
  5. Send a packet to the other node from the root node, Node 4:udp send abcd::1 1234 50 100 100000

Result

<10% packets lost on the pinging node. No leaks in the packet buffer (check with gnrc_pktbuf_cmd).