+ and % as regular expression in IOS question

szmarcek

so I wonder about the following .+ -- would be any standard dtmf character and then repeated one or more time so .+ could be 00000 or 11111 or 111however, could .+ be 012323 or 32342 etc? or if the dot is 1 then it has to be one or more of instances of 1, if the dot is 2 then it has to be one or more instances of 2 etc .% - could it be 01 or 02 or 012 or 123 etc. So do the digits represented by % have to be the same as the digit matched by . sign? #Thanks

PCHoldmann

It would match any string, not just repeats of a single digit.

Cisco IOS Voice, Video, and Fax Configuration?Guide, Release?12.2 - Configuring Dial Plans, Dial Peers, and Digit Manipulation [Cisco IOS Software Releases 12.2 Mainline] - Cisco

Normally I prefer a more exact match, it lessens the likelihood of mistakes. If you need to match any terminating string, like a single dial peer for anything starting in 9, Cisco provides "T" so your dial peer would match "9T".

szmarcek

thanks for replying. So can you confirm that if you do under dial-peer destination pattern .+ordestination pattern .Tboth would match any string that you will dial (well almost any as .+ would need at least two digits whereas .T would match 1 digit too)?Thanks

PCHoldmann

Either one (.+ or .T)will match anything over a single digit. .T seems to be the more "standard" way to do it, and the way I would stick with.

szmarcek

ok, thank you.