Asterisk不同Verbosity级别有何作用？各级别日志输出有何差异？

Hey there! Let me break down Asterisk's verbosity levels clearly for you—these are total lifesavers when you're debugging call flows, troubleshooting trunks, or just keeping an eye on your system. Verbosity controls how much detail gets dumped into your logs (like /var/log/asterisk/messages) or the interactive console, and each level adds more granularity than the last.

Level 0 (Default Quiet Mode) #

• This is the leanest level, only logging critical, showstopper errors. Think things like Asterisk failing to start because a core config file is missing, a module crashing hard, or fatal authentication failures that lock out your trunks. Perfect for production systems where you don't want log clutter—only the stuff that breaks everything gets logged here.

Level 1 #

• Builds on Level 0 by adding basic operational updates. You'll see things like successful module loads, system startup/shutdown confirmations, and major state changes (e.g., a SIP trunk going offline or coming back online). Great for general monitoring without drowning in details.

Level 2 #

• Starts getting into call-specific details. This level logs call initiation events (New channel), hangup notifications, and high-level dialplan execution steps (like Executing [123@internal:1] Dial("SIP/desk-phone-00000001", "SIP/remote-office")). Use this when you need to track the basic path of a call through your system.

Level 3 #

• Cranks up the dialplan detail. Now you'll see variable assignments (Set(CALLERID(name)=Support Line)), conditional checks (GotoIf($["${EXTEN}" = "911"]?emergency,s,1)), and context around why a dialplan took a specific path. This is your go-to for debugging why a dialplan rule isn't behaving like you expected.

Level 4 #

• Dives into low-level channel and protocol details. You'll see full SIP/SDP negotiation logs (invite messages, response codes, header details), RTP stream setup, and per-call authentication attempts. If you're troubleshooting audio issues, SIP trunk misconfigurations, or call failure reasons, this level gives you the technical meat you need.

Level 5 (Maximum Verbosity) #

• This is the "everything including the kitchen sink" level. It logs every tiny step: raw SIP packets, every single dialplan execution line, AMI events, even internal Asterisk function calls. Only use this for deep-dive debugging—leaving it on will flood your logs with data and can slow down your system if you're handling high call volume.

Quick Pro Tips #

You can adjust verbosity on the fly right in the Asterisk console with these commands:

• core set verbose 3 (switches verbosity to level 3 immediately)
• core show verbose (checks what your current verbosity level is)

To make the setting stick across restarts, edit your asterisk.conf file and set the verbose parameter under the [options] section.

内容的提问来源于stack exchange，提问作者sw007