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NCM Config Change templates - bizarre problem

brinky over 7 years ago

Hi,

I'm fairly new to NCM, but I'm hoping someone can answer this weird problem I've come across. I've created a config change template to upload files from a local tftp server to a Cisco switch. It works ok, but if I try and upload ANY file with a filename beginning with the letter t (e.g.test.txt), it fails! Files such as "abc.txt" or "bcde.txt" or an IOS image bin file are fine, but "text.txt", "toolong.txt" or "tuvw.txt" all fail.

When I click on the link to "show commands in new window", the script has dropped the "t" and inserted a space instead.

The script should say "copy tftp://10.1.1.1/test.txt flash:test.txt" , but says "copy tftp://10.1.1.1 est.txt flash:test.txt"

I've read the thwack article about inserting special characters, but it doesn't really help. Please see attached screenshots and the code below.

Any suggestions would be much appreciated,

Thanks,

Mike

/*
.CHANGE_TEMPLATE_DESCRIPTION
This is a base change template to act as a starting point for other templates.
.PLATFORM_DESCRIPTION
Replace with details of the device platform for which the template is being created.

.PARAMETER_LABEL @ContextNode
        NCM Node
.PARAMETER_DESCRIPTION @ContextNode
        The node the template will operate on. All templates require this by default. The target node is selected during the first part of the wizard so it will not be available for selection when defining values of variables.
.PARAMETER_LABEL @Var_TFTP
       Enter TFTP server IP Address
.PARAMETER_DESCRIPTION @Var_TFTP
        eg 10.1.1.1
.PARAMETER_LABEL @Var_Sourcefile
        Enter source file name to upload
.PARAMETER_DESCRIPTION @Var_Sourcefile
        e.g test.txt
.PARAMETER_LABEL @Var_Destination
        Enter destination file name on flash
.PARAMETER_DESCRIPTION @Var_Destination
        e.g test.txt
*/

script BaseChangeTemplate(
                             NCM.Nodes @ContextNode,
                             string @Var_TFTP,
                             string @Var_Sourcefile,
                             string @Var_Destination    )
{
//TODO - insert details of change template

string @SlashSymbol='/'
string @String_CLI=@Var_TFTP + @SlashSymbol + @Var_Sourcefile

//Enter CLI commands
CLI
{
copy tftp://@String_CLI flash:@Var_Destination
}

}

attachments.zip

Top Replies

0 christopher.a.thornton over 7 years ago

The only thing I can think to try is to modify your @String_CLI variable that you have defined. Inside of that variable you are trying to use the @SlashSymbol and that is not in the output of the text either so maybe that is trying to convert the / and the t character (it is interpreted in RexEx as a tab) and that is why you are ending up with white space there.
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0 brinky over 7 years ago in reply to christopher.a.thornton

Hi Chris,
Thanks for the reply, I did wonder if something like that was happening, as it seemed to be the only logical explanation. Think I read somewhere that NCM doesn't like the / character either, which is why I was using the @SlashSymbol. Can you think of a better way of getting an end result of tftp://10.1.1.1/test.txt ? I was only doing it that way, as it was the only thing I could get to work :-)
Whilst I've done a little Javascript/ASP programming in the past, I've never seen regex, so do you know of any good tutorial/beginners guides?
Regards,
Mike
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0 christopher.a.thornton over 7 years ago in reply to brinky

Hi Mike,
I would try to add maybe a second slash to the sequence and see if that works out, usually when you have a // the first one is escaped and the second one is a literal /. If that doesn't work you may have to play around with the combination at the @String_CLI variable and see if you can get a combination that will work out well.
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0 brinky over 7 years ago in reply to christopher.a.thornton

Hi Chris,
I've tried // and \/ (back slash, forward slash) but neither worked, unfortunately. Thanks for the suggestion though.
Mike
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0 wluther over 7 years ago in reply to brinky

brinky I would probably open a support ticket at this point, just to cover all my bases. Also, perhaps cvachovecj has some advice.
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0 brinky over 7 years ago in reply to wluther

Hi wiuther,
Thanks for the suggestion, I might give that a go next week, nearly time to go home :-)
Mike
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0 cvachovecj over 7 years ago in reply to brinky

The problem is when there's the '/t' sequence that is obviously turned into a tab character. Let me check if there's any workaround.
Jiri
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0 cvachovecj over 7 years ago in reply to cvachovecj

Hmm. There's no known workaround. Don't use file names starting with 't' .
If you open a support case, the engineers might find a way.
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0 brinky over 7 years ago in reply to cvachovecj

Hi Jiri,
Thanks, I think you're right and I'll open a support case. I'll post a reply if I get anything back.
Regards,
Mike
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0 brinky over 7 years ago in reply to brinky

Got an answer from tech support. If you tick the "preserve white space" box, just above where you enter the config change template, it works. I've tested it and it does seem to work ok.
Thanks for all the replies, it's much appreciated,
Regards,
Mike
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