Issue with Zyxel GS1900

[DonKannalie]

netmiko 4.2.0 Netmiko is not using/cannot disable the pager for zyxel_os.? Doesn't continue after '--More--'.

Edit: I forget to add what I am actually doing. Even though it's pretty plain simple:

device = {
    'host': 'myhost', 
    'ip': 'xxx.xxx.xxx.xxx', 
    'device_type': 'zyxel_os', 
    'username': 'username', 
    'secret': 'secret',
    'password': 'password',
    'banner_timeout': 30, 
}

with ConnectHandler(**device) as net_connect:
    net_connect.enable()
    res = net_connect.send_command("show running-config")

Logging output:

DEBUG:paramiko.transport:userauth is OK INFO:paramiko.transport:Authentication (password) successful! DEBUG:paramiko.transport:[chan 0] Max packet in: 32768 bytes DEBUG:paramiko.transport:[chan 0] Max packet out: 32768 bytes GS1900# GS1900# DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b'\n' DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: GS1900# DEBUG:netmiko: Parenthesis found in pattern.

pattern: (#|>)

This can be problemtic when used in read_until_pattern().

You should ensure that you use either non-capture groups i.e. '(?:' or that the parenthesis completely wrap the pattern '(pattern)' DEBUG:netmiko:Pattern found: (#|>) GS1900# DEBUG:netmiko:read_channel: DEBUG:netmiko:Clear buffer detects data in the channel DEBUG:netmiko:read_channel: DEBUG:netmiko:[find_prompt()]: prompt is GS1900# DEBUG:netmiko:In disable_paging DEBUG:netmiko:Command: terminal length 0

DEBUG:netmiko:write_channel: b'terminal length 0\n' DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: terminal length 0 Unknown command GS1900# DEBUG:netmiko:Pattern found: (terminal\ length\ 0) terminal length 0 DEBUG:netmiko:terminal length 0 DEBUG:netmiko:Exiting disable_paging DEBUG:netmiko:read_channel: DEBUG:netmiko:Clear buffer detects data in the channel DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b'\n' DEBUG:netmiko:read_channel: GS1900# DEBUG:netmiko:read_channel: DEBUG:netmiko:[find_prompt()]: prompt is GS1900# DEBUG:netmiko:write_channel: b'show running-config\n' DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: show running-config

DEBUG:netmiko:Pattern found: (show\ running-config) show running-config DEBUG:netmiko:read_channel: [...] ## truncated; previous output repeats a few times DEBUG:netmiko:read_channel: ! System Description: ZyXEL GS1900-8 Switch ! Revision: B1 ! Serial Number: xxx ! MAC Address Range: xxx - xxx ! Boot Version: V2.0.2.1 | 05/21/2021 ! Firmware Version: V2.70(AAHH.5) | 02/08/2023 ! System Up Time: 26 days, 17 hours, 59 mins, 11 secs lag load-balance src-dst-mac lacp system-priority 32768 ! system location "xxx" system contact "xxx" ip address xxx.xxx.xxx.xxx mask xxx.xxx.xxx.xxx ip default-gateway xxx.xxx.xxx.xxx ip dns xxx.xxx.xxx.xxx1 xxx.xxx.xxx.xxx clock source sntp sntp host xxx.xxx.xxx.xxx port 123 username "xxx" secret 8 xxx vlan 2 name "vlan0002" vlan 3 name "vlan0003" vlan 4 --More-- DEBUG:netmiko:read_channel: [...] ## truncated; previous output repeats many times DEBUG:netmiko:write_channel: b'exit\n' ERROR:

Pattern not detected: 'GS1900\#' in output.

Things you might try to fix this:

1. Explicitly set your pattern using the expect_string argument.
2. Increase the read_timeout to a larger value.

You can also look at the Netmiko session_log or debug log for more information.

[hgqcs]

DEBUG:netmiko:write_channel: b'terminal length 0\n' DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: terminal length 0 Unknown command GS1900# netmiko.zyxel.zyxel_ssh.ZyxelSSH.disable_paging is nothing to do, if you want disable paging(a disable paging command), you should rewrite disable_paging

[ktbyers]

@hgqcs @DonKannalie What is the command to disable paging on this Zyxel GS1900?

[DonKannalie]

You mean from the zyxel os settings itself? There is None as far as my research went. Also no paging on certain key input. It's a smart managed switch. The cli is kinda limited.

[ktbyers]

@DonKannalie Does this generally apply to Zyxel devices (i.e. no way to disable output paging) or is it specific to the GS1900 (basically I am wondering if the driver ever really worked).

[DonKannalie]

For higher tier devices I guess so, but I cannot confirm/deny, as I don't have one. It's stated on the Zyxel forum years ago though (https://community.zyxel.com/en/discussion/1740/disable-paging-in-cli).

[ktbyers]

Okay, Zyxel's are sort of broken then since Netmiko counts on their being a way to disable output paging...so you would probably have to build a for-loop and use write_channel()/read_channel() to handle this.

I created an issue recently to make a generic output pager, but someone would have to build that (as it doesn't exist in current Netmiko).

Historically, I would generally reject platforms that didn't have a reasonable way to disable output paging.

[DonKannalie]

Thanks. "Historically, I would generally reject platforms that didn't have a reasonable way to disable output paging." Understandable...

[ktbyers]

You definitely can do it, but you will just have to write some lower level of code to detect and handle the output paging--unfortunately :-(