tcl and vty issue

[fredericg]

Hi

I am trying to write a small tcl script that intends to send several pings and to check their results.

I am doing very basic tests and running into trouble.

So I am using a Cisco 1812 running IOS version 15.1(2)T1 and here are the tcl lines (similar to several examples in blogs):

set pingOut [exec "ping 192.168.4.1"]

puts stdout "*** $pingOut ***"

The weird thing is that it works first and I get something like

#puts stdout "*** $pingOut ***"

***
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.4.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms ***

but then after running the same code a few times I only get the following:

#puts stdout "*** $pingOut ***"

***  ***
Now if I reboot the router or add new vty's it works again. Though, "clear line" doesn't solve the issue. Also I would like to be able to run this bit of code several times without the need to do any manual cleaning. Any idea if I am missing something or if there is a bug in relation to this behaviour?

Thanks and regards,

Frederic

[Joe Clarke · Accepted solution]

This is CSCtg89622.  It only affects 15.1(2)T, and will be fixed in the next 15.1T release.  The only workaround is to downgrade to 15.1(1)T for the time being.

[fredericg]

Hi Joseph

I downgraded to 15.1(1)T and I don't get the issue anymore. Thanks a lot for your help.

Regards,

Frederic