Juniper switch: Netmiko not sending "commit" while device has "commit confirmed" configured

[tmcclure-labs]

I've developed a juniper configuration tool using Netmiko that allows remediation to happen in 4 stages: staging, commit confirmed, device reachability checks and finally a commit option. I'm having issues with "net_connect.commit()" when a device has a commit confirmed set.

When I send the net_connect.commit() I get the following output:

# commit confirmed will be rolled back in less than 12 minutes 
{master:0}[edit]
username@hostname#

When I send the "net_connect.commit()" the script doesn't actually end up sending a commit, instead it reports "Commit failed with the following errors:

configure 

Entering configuration mode

Users currently editing the configuration:

  user1 terminal pts/0 (pid 63243) on since 2025-05-15 19:53:57 UTC, idle 00:00:34

      {master:0}[edit]

The configuration has been changed but not committed



# commit confirmed will be rolled back in 9 minutes

{master:0}[edit]

user1@switch11#commit confirmed will be rolled back in 9 minutes

{master:0}[edit]

user1@switch11# 

Every time 'enter' is sent the first line (what netmiko interprets as the base prompt) is "# commit confirmed will be rolled back in {x} minute(s)". I've tried sending a commit via net_connect.send_command("commit") and net_connect.send_command("commit", expect_string=r".# commit confirmed will be rolled back in \d+ minute(s)? ." but that doesn't work because of the amount of time it takes to commit a juniper stack. I also tried "net_connect.base_prompt = r".# commit confirmed will be rolled back in \d+ minute(s)? ." then a net_connect.commit() with no luck.

Anyone have any ideas on how to get around this?

[ktbyers]

Probably something like:

# Clear out any data in the SSH channel
net_connect.read_channel()
# Set read_timeout to be long enough for the commit to complete plus some buffer
net_connect.send_command("commit", expect_string=r"switch11#", read_timeout=180)

Let me know if that works or if you are still seeing issues.

[tmcclure-labs]

That worked! I ended up using the hostname of the device as the expect string, worked great. Thank you!

        # Clear out any data in the SSH channel
        net_connect.read_channel()
        # Set read_timeout to be long enough for the commit to complete plus some buffer
        output = net_connect.send_command("commit", expect_string=hostname, read_timeout=180)