Autonomous system path filtering with regular expressions
String matching—A string of characters in the regular expression matches any equivalent substring in the autonomous system path; 29 has three matches in | 210 291 1296 29 |, for example.
String matching alternatives—The pipe symbol (|) means “or.”
String matching ranges and wildcards—Brackets ([ ]) can be used for ranges, [...]

Here is a quick way to set the DE (Discard Eligible) bit on specific traffic exiting a frame-relay interface.
We want to set the DE on all IP Precedence routine and priority traffic exiting serial0/0/0 on DLCI 202
—Match the traffic in an ACL
# access-list 101 permit ip any any precedence 0
# access-list 101 permit ip any [...]

Here are three ways to tell an OSPF router which path it should take to reach a destination.
1. Use the bandwidth command to change the metric for an interface.
2. Use the cost command to change the metric for an interface.
3. Filter out the route from an advertising router. First create an ACL to match the [...]