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VPP has now been built, installed, and started.
To give it a spin, we can create a tap interface and try a simple ping
(with trace).
Make sure you have run:
$ vagrant ssh
To get to the vagrant VM:
vagrant@localhost:~$
Confirm that vpp is running with
vagrant@localhost:~$ sudo status vpp
vpp start/running, process 25202
To create the tap:
vagrant@localhost:~$ sudo vppctl tap connect foobar
Created tap-0 for Linux tap 'foobar'
vagrant@localhost:~$ sudo vppctl show int
To assign it an ip address (and 'up' the interface):
vagrant@localhost:~$ sudo vppctl set int ip address tap-0 192.168.1.1/24
vagrant@localhost:~$ sudo vppctl set int state tap-0 up
To turn on packet tracing for the tap interface:
vagrant@localhost:~$ sudo vppctl trace add tapcli-rx 10
Now, to set up and try the other end:
vagrant@localhost:~$ sudo ip addr add 192.168.1.2/24 dev foobar
vagrant@localhost:~$ ping -c 3 192.168.1.1
To look at the trace:
vagrant@localhost:~$ sudo vppctl show trace
And to stop tracing:
vagrant@localhost:~$ sudo vppctl clear trace
Other fun things to look at:
The vlib packet processing graph:
vagrant@localhost:~$ sudo vppctl show vlib graph
which will produce output like:
Name Next Previous
ip4-icmp-input error-punt [0] ip4-local
ip4-icmp-echo-request [1]
vpe-icmp4-oam [2]
To read this, the first column (Name) is the name of the node.
The second column (Next) is the name of the children of that node.
The third column (Previous) is the name of the parents of this node.
To see this README again:
cat /vagrant/README
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