(VB.NET) SSH Commands to Cisco Switch

Demonstrates how to establish an SSH session with a Cisco switch (or something similar) and send commands in a device console session.

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

' This example assumes the Chilkat API to have been previously unlocked.
' See Global Unlock Sample for sample code.

Dim ssh As New Chilkat.Ssh

Dim success As Boolean = ssh.Connect("172.16.16.100",22)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Authenticate using login/password:
success = ssh.AuthenticatePw("myLogin","myPassword")
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Start a shell session.
Dim channelNum As Integer = ssh.QuickShell()
If (channelNum < 0) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If



' If the CISCO switch returns a prompt with "#", then read until we get the prompt.
' (It's not actually required that we do this, but it helps to know that all is OK at this point..)
success = ssh.ChannelReceiveUntilMatch(channelNum,"#","utf-8",True)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If


' Show what we received so far:
Debug.WriteLine(ssh.GetReceivedText(channelNum,"utf-8"))

' Send a "show clock" command.
success = ssh.ChannelSendString(channelNum,"show clock" & vbLf,"utf-8")

' Read the output to the next interactive prompt.
success = ssh.ChannelReceiveUntilMatch(channelNum,"#","utf-8",True)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(ssh.GetReceivedText(channelNum,"utf-8"))

' Send another command and get the output, and so on...
success = ssh.ChannelSendString(channelNum,"some other command" & vbLf,"utf-8")
success = ssh.ChannelReceiveUntilMatch(channelNum,"#","utf-8",True)
If (success <> True) Then
    Debug.WriteLine(ssh.LastErrorText)
    Exit Sub
End If

Debug.WriteLine(ssh.GetReceivedText(channelNum,"utf-8"))


ssh.Disconnect()