topic Re: GRACEFUL_DISCONNECT_WAIT_SEC does not work in Tools

GRACEFUL_DISCONNECT_WAIT_SEC does not work

rasmus.elmholt — Tue, 07 May 2024 10:09:38 GMT

Hi all

I have a small script that collects information from a list of devices, but it takes a long time.

I have found out that there is a disconnection time of 10s I think I am hitting.

I have found the documentation that says I can change the settings but when I test it out there is still a delay after the disconnect.

def atswrapper_bfd(dev_ip, cli_username, cli_password): atsbfd = None testbed = loader.load( { "devices": { device["name"]: { "connections": { "cli": { "protocol": "ssh", "ip": dev_ip, "init_exec_commands": [], "init_config_commands": [] }, "settings": { "GRACEFUL_DISCONNECT_WAIT_SEC": 1, "POST_DISCONNECT_WAIT_SEC": 1 } }, # Find a better way to do this: https://github.com/CiscoTestAutomation/genielibs/issues/12 "credentials": { "default": { "username": cli_username, "password": cli_password, } }, "type": "Device", "os": "iosxe" } } } ) atsdevice = testbed.devices[device["name"]] atsdevice.connect(via='cli', log_stdout=True, learn_hostname=True, connection_timeout=2) atsbfd = atsdevice.parse('show bfd neighbors details') atsdevice.disconnect() return atsbfd

Re: GRACEFUL_DISCONNECT_WAIT_SEC does not work

bigevilbeard — Tue, 07 May 2024 10:17:08 GMT

Hmm... from what you describe, it seems that the 10-second delay you are see is not directly related to GRACEFUL_DISCONNECT_WAIT_SEC / POST_DISCONNECT_WAIT_SEC settings. It might be caused by a combination a few things such as network latency, connection timeouts, or device-specific limitations. I am also unsure if the genielibs library might have additional logic for disconnection that overrides your settings too (guessing here)?

Re: GRACEFUL_DISCONNECT_WAIT_SEC does not work

rasmus.elmholt — Tue, 07 May 2024 12:14:18 GMT

Hi @bigevilbeard

When I look at the logs it gives from log_stdout=True it completes the show command, hangs for 10 seconds and then continue.

I have tried to add the following lines and then the function is a lot faster.

atsdevice = testbed.devices[device["name"]] atsdevice.connect(via='cli', log_stdout=True, learn_hostname=True, connection_timeout=2) atsdevice.settings.GRACEFUL_DISCONNECT_WAIT_SEC = 0 atsdevice.settings.POST_DISCONNECT_WAIT_SEC = 0 atsbfd = atsdevice.parse('show bfd neighbors details') atsdevice.disconnect()

But I still cannot get it to work when using the dictionary with configuration.

Re: GRACEFUL_DISCONNECT_WAIT_SEC does not work

bigevilbeard — Tue, 07 May 2024 12:44:19 GMT

Not sure if this would work, but try this idea below, the GRACEFUL_DISCONNECT_WAIT_SEC and POST_DISCONNECT_WAIT_SEC settings are now set within the settings key of the device dictionary, it _should_ correctly set the values and reduce the delay between sending the show command and disconnecting from the device. (I hope!)

def atswrapper_bfd(dev_ip, cli_username, cli_password): atsbfd = None testbed = loader.load( { "devices": { device["name"]: { "connections": { "cli": { "protocol": "ssh", "ip": dev_ip, "init_exec_commands": [], "init_config_commands": [] } }, "credentials": { "default": { "username": cli_username, "password": cli_password, } }, "type": "Device", "os": "iosxe", "settings": { "GRACEFUL_DISCONNECT_WAIT_SEC": 0, "POST_DISCONNECT_WAIT_SEC": 0 } } } } ) atsdevice = testbed.devices[device["name"]] atsdevice.connect(via='cli', log_stdout=True, learn_hostname=True, connection_timeout=2) atsbfd = atsdevice.parse('show bfd neighbors details') atsdevice.disconnect() return atsbfd