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[Cerrar]| Pattern (Regex) | Purpose | Suggested Color | |----------------|---------|----------------| | %ERROR | Error messages | Red text + yellow background | | %WARNING | Warnings | Orange text | | %NOTICE | Notices | Light blue | | down | Interface/link down | Red | | up.+\r | Interface/link up | Green | | err-disable | Port error state | Magenta + bold | | deny\|block | ACL denials | Red + italic | | authentication failed | Login failures | Red background | | [0-9]+\.[0-9]+\.[0-9]+\.[0-9]+ | IP addresses | Cyan | | vlan [0-9]+ | VLAN changes | Yellow |
The primary purpose of syntax highlighting in a terminal emulator like is to improve readability and reduce cognitive load Cisco Blogs . In complex Cisco outputs—such as show running-config show ip bgp summary xshell highlight sets cisco
Network engineers typically use specific color codes to quickly identify critical information: : down , shutdown , err-disabled , administratively down . Green : up , connected , established , active . Yellow/Orange : warning , reconfigured , changed , collision . | Pattern (Regex) | Purpose | Suggested Color
Configuration keywords (interface, ip address, description, no shutdown, router ospf, access-list, permit/deny) Yellow/Orange : warning , reconfigured , changed , collision
in a distinct color (like cyan) helps track traffic flow in debugs.
If you don't want to type 20 regex rules manually, use an import file.