Wednesday, September 7, 2011

Banner Exec $(Tokens)


Tokens are variables that can display things like hostnames, which line has been connected to, etc.

There are several banner types that can take advantage of tokens, but for now, I want to configure banner exec.

When I telnet into R2 from R1, I want R2 to display its hostname, which line I am connecting to, the line description and domain name.

I need to add some configuration first:

R2(config)#ip domain-name stupidtroutertricks.com
R2(config)#line vty 0 4
R2(config-line)#location ?
  LINE  One text line describing the terminal's location


R2(config-line)#location VTY LINE
R2(config-line)#exit
R2(config)#

The banner exec tokens are self explanatory. The only one that might leave a doubt is $(line-desc). This variable calls the text associated with the location command under the line configuration.

R2(config)#banner exec ^You are connected to $(hostname) on line $(line), $(line-desc) at $(domain)^

Here's the telnet in action:

R1#telnet 10.1.12.2
Trying 10.1.12.2 ... Open




User Access Verification


Password: 
You are connected to R2 on line 194, VTY LINE at stupidtroutertricks.com
R2>

3 comments:

  1. Very useful if port has non standard parameters (baud rate, flow control, etc).

    ReplyDelete
  2. Increasing prevalence of bleeding disorders and growing severity with the genetic evolution globally is anticipated to drive overall haemophilia treatment market growth. Increasing R&D initiatives especially on identifying therapeutic agents is one of the major factors expected to positively impact haemophilia treatment market growth.

    Also read: acetic anhydride market | Tobacco Market

    ReplyDelete