topic Re: Pyats testbed connections in Tools

Pyats testbed connections

aidariys5 — Sun, 10 Apr 2022 09:53:53 GMT

Hi,

What is the purpose of having multiple connections described in testbed file? Is it possible to choose one among others for connection?

For example:

devices:
R1:
    os: ios
    type: ios
    connections:
      a:
        protocol: ssh
        ip: 192.168.1.1
        port: 22
      b:
        protocol: telnet
        ip: 192.168.1.1
        port: 23

If I specify one of this connection (a or b) in testbed, then pyats can connect to device. If both connections are present as in example above, then connection is not working. I saw similar examples with several connections in documentation but didn't find any explanation.

Thank you.

Re: Pyats testbed connections

balaji.bandi — Sun, 10 Apr 2022 11:05:16 GMT

if you are using only SSH, then remove telnet from config.

https://pubhub.devnetcloud.com/media/pyats-getting-started/docs/quickstart/manageconnections.html?highlight=telnet

Re: Pyats testbed connections

aidariys5 — Mon, 11 Apr 2022 08:27:30 GMT

Thanks for reply, but I was asking about use cases of having multiple connections for one device. I found that it is needed if you describe HA pair or stack, for example.

Another usage that you can choose connection in python:

testbed = loader.load('testbed.yaml')

r1 = testbed.devices['R1']

r1.connect(alias='aaa', via='a')

r1.connect(alias='bbb', via='b')

r1.aaa.execute('show clock')

Re: Pyats testbed connections

bigevilbeard — Mon, 11 Apr 2022 09:27:06 GMT

@aidariys5 multiple connection instances start to make sense when you want to perform many show commands at the same time through asynchronous means (eg, multiprocessing, threading, etc).