Cisco Regular Expression

Below is the important table need to be noted for regular expression in Cisco.

Use \ (backslash) to match the character as is.

source: here

Character		Special Meaning
period	.	Matches any single character, including white space.
asterisk	*	Matches 0 or more sequences of the pattern.
plus sign	+	Matches 1 or more sequences of the pattern.
question mark	?	Matches 0 or 1 occurrences of the pattern.
caret	^	Matches the beginning of the input string.
dollar sign	$	Matches the end of the input string.
underscore	_	Matches a comma (,), left brace ({), right brace (}), left parenthesis, right parenthesis, the beginning of the input string, the end of the input string, or a space.
brackets	[]	Designates a range of single-character patterns.
hyphen	-	Separates the end points of a range.

Redistribution problem

1. Examine if there is a filter applied to the interface that could prevent the distribution

2. The route may be non installed because of there is another route wit better metric

Debug: Authentication Error

*Mar 1 01:20:49.775: %TCP-6-BADAUTH: No MD5 digest from 192.10.1.254(179) to 192.10.1.10(21793) (RST)

The message above is generated on TCP port 179.

From there, we can guess of who generated this message.