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Extreme ERS Netmiko 4 - Pattern not detected: '[>#]' in output.

See original GitHub issue

Hello, I am using a simple script to configure SNMPv3 username and password. With Netmiko 3 it works perfectly but with Netmiko 4 I get an error:

Pattern not detected: ‘[>#]’ in output.

def connect_to_switch(ip, comms):
    print(f"Connecting to {ip}")
    switch = {
        'device_type': 'extreme_ers',
        'host': ip,
        'username': 'USERNAME',
        'password': 'PASSWORD',
        "global_delay_factor": 2
    }
    net_connect = ConnectHandler(**switch)    
    net_connect.special_login_handler()        
     
    for command in comms:
        v = net_connect.send_command(command, expect_string=r'#')
        print(v)
    net_connect.disconnect()
 
 
if __name__ == "__main__":
    # Commands to sent
    commands = ['configure terminal',
                "snmp-server user SNMPUSERNAME sha SECURE_PASS aes SECURE_PASS read-view snmpv1Objs",
                "wr mem",
                ]
 
     
    connect_to_switch('10.10.10.10', commands)

Here is the DEBUG log file. The “host1#” is there and it should match the but somehow it does not understand the pattern.

DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b’\n’ DEBUG:netmiko:read_channel: [2J[0m[0;0f[1;1H[2;1H[3;1H[4;1H[5;1H[6;1H[7;1H[8;1H[9;1H[10;1H[11;1H[12;1H[13;1H[14;1H[15;1H[14;1HEnter Ctrl-Y to begin.[16;3H[17;3H Ethernet Routing Switch 4926GTS-PWR+ [17;76H[18;3H Copyright © 1996-2021 Extreme Networks. All rights reserved. [19;3H This product is protected by one or more US patents listed [20;3H at http://www.extremenetworks.com/patents along with [21;3H their foreign counterparts. [22;3H [23;3H HW:01 FW:7.5.0.4 SW:v7.8.4.013[23;76H[24;3H************[?25l DEBUG:netmiko:write_channel: b’\x19’ DEBUG:netmiko:read_channel: [2J[18;1H[2K[19;1H[2K[20;1H[2K[2J[4;14HLast login: – [5;14HFailed retries since last login: 0 [10;0HPress ENTER to continue [24;1H DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b’\n’ DEBUG:netmiko:read_channel: [2J[?25h[2J[23;1H host1# DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b’\n’ DEBUG:netmiko:read_channel: host1# DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b’\n’ DEBUG:netmiko:read_channel: host1# DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b’\n’ DEBUG:netmiko:read_channel: host1# DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b’\n’ DEBUG:netmiko:read_channel: host1# DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: 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: host1# DEBUG:netmiko:read_channel: DEBUG:netmiko:read_channel: DEBUG:netmiko:write_channel: b’exit\n’ DEBUG:paramiko.transport:EOF in transport thread

Issue Analytics

State:
Created a year ago
Comments:10 (6 by maintainers)

Top GitHub Comments

1reaction

mrkslmcommented, Jun 13, 2022

@ktbyers
Hey Kirk, Tested with my device and it works now!

1reaction

ReK42commented, Jun 9, 2022

Okay, this looks like a Netmiko bug?

Netmiko looks like it was expecting cnrl-y and then username + password.

I am not sure if something changed here on the ERS or if it never really worked.

On all current models the behaviour over SSH is username/password first, then Ctrl+Y, then Enter. This may differ over console connections and some older, end-of-life models but I believe it is true for all ERS models that are still supported by Extreme.

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