Make sure the switch is running and that you have the right port

[onlyone-i]

In the basic experiment, using simple_switch_CLI --thrift-port 9090 does not allow access to the switch management interface，and the tips returned are as follows:

p4@p4-virtual-machine:~/P4/tutorials/exercises/basic$ simple_switch_CLI --thrift-port 9090
Could not connect to any of [('127.0.0.1', 9090)]
Could not connect to thrift client on port 9090
Make sure the switch is running and that you have the right port

make run executed successfully, and accessed to the mininet control interface:

mininet> pingall
*** Ping: testing ping reachability
h1 -> h2 h3 h4 
h2 -> h1 h3 h4 
h3 -> h1 h2 h4 
h4 -> h1 h2 h3 
*** Results: 0% dropped (12/12 received)
mininet> 

[jafingerhut]

I just downloaded both of the VM images built from the scripts in this repo on 2022-Sep-01 from this web page: https://github.com/jafingerhut/p4-guide/blob/master/bin/README-install-troubleshooting.md

I installed the VM images using VirtualBox, logged into the user account p4, ran these commands:

cd tutorials/exercises/basic
cp solution/basic.p4 .
make run

then I created a separate terminal window and ran the command:

simple_switch_CLI --thrift-port 9090

and it connected successfully.

Those VMs were created by running these commands using the latest versions of the files in these repos as of 2022-Sep-01:

cd vm-ubuntu-20.04
vagrant up

What steps did you follow to create the system where you saw the results in your comment?

[onlyone-i]

I just downloaded both of the VM images built from the scripts in this repo on 2022-Sep-01 from this web page: https://github.com/jafingerhut/p4-guide/blob/master/bin/README-install-troubleshooting.md

I installed the VM images using VirtualBox, logged into the user account p4, ran these commands:

cd tutorials/exercises/basic
cp solution/basic.p4 .
make run

then I created a separate terminal window and ran the command:

simple_switch_CLI --thrift-port 9090

and it connected successfully.

Those VMs were created by running these commands using the latest versions of the files in these repos as of 2022-Sep-01:

cd vm-ubuntu-20.04
vagrant up

What steps did you follow to create the system where you saw the results in your comment?

I have used steps from elsewhere and may have missed something, I am going to check against the steps you mentioned and see if I can find the problem.Also, I see the following hint in the logs and wonder if it has anything to do with the issue.
[21:22:53.335] [bmv2] [W] [thread 30300] You used the '--thrift-port' command-line option, but this target was compiled without Thrift support. You can enable Thrift support (not recommended) by providing '--with-thrift' to configure.

[jfingerh]

That message in the log is a sign that simple_switch_grpc was built in a way that did not enable the Thrift server. The current build scripts do enable it, as you can see here (the --with-thrift option to configure): https://github.com/p4lang/tutorials/blob/master/vm-ubuntu-20.04/user-dev-bootstrap.sh#L176

[onlyone-i]

That message in the log is a sign that simple_switch_grpc was built in a way that did not enable the Thrift server. The current build scripts do enable it, as you can see here (the --with-thrift option to configure): https://github.com/p4lang/tutorials/blob/master/vm-ubuntu-20.04/user-dev-bootstrap.sh#L176

Then I should have found the problem, which I have solved so far.
I missed the parameter --with-thrift option to configure.