ifName match port-channel([1-9]|1[0-9])"
However that gives me 0 matches. If I change it to something like ifName match port-channel*" I get all the port channels, so it's matching the device properly, but for this alert checker I just need port channels 1-19.
Any ideas? I've tried a bunch of combinations and nothing seems to work right. Even "port-channel." doesn't match the additional character.