Supporting BCVRE Study Guide Chapter 9 Logging and Packet Captures
Supporting BCVRE Study Guide Chapter 9 Logging and Packet Captures

Supporting BCVRE Study Guide Chapter 9 Logging and Packet Captures

Posted on

Objectives: As a Brocade Certified vRouter Engineer, you must be able to demonstrate the ability to install, configure and troubleshoot features of Brocade Vyatta Network OS.

Target: This course is for anyone tasked with configuring or managing the Brocade Vyatta vRouter. This course also for those who are preparing to take the BCVRE Certification Exam.

Course prerequisites: Before taking these bundled courses, students should have basic IT networking experience, including working knowledge of TCP/IP.

BCvRE Bootcamp


  • Logging Basics
  • Feature-Specific Logging
  • Monitoring in Real-Time
  • User Management

Logging Basics

One of the advantages of vRouter software is its extensive local logging capabilities.

vRouter supports an integrated hard drive, providing capacity for storing local messages without the requirement of an external server.

vRouter software uses the Linux standard syslogd process to store logs
Log messages are stored in the file /var/log/messages.

  • When this file reaches 500KB in size, the vRouter renames the file to messages.0 and opens a new messages file.
  • This continues up to the file messages.9, for a total of 5 gigabytes of log messages.

the vRouter system maintains separate logs for bootup messages, PPP connection setup, IPsec connection setup, and other features.

To view the entire set of log files in sequential order, use the command show log all.

If you just want to see what happened most recently on your device, you can use the show log tail command.

  • This displays the last 10 log entries.

Example Show Log

Feature-Specific Logging

In order to view protocol and feature activity, you first need to enable the vRouter to record the information in the system log.

By default, the vRouter does not capture routine activity, such as routing protocol exchanges or NAT or firewall packets.

For protocol exchanges that only involve the vRouter (DNS, routing updates, etc.), you enable logging from operational mode using the monitor command.

Be as specific as possible with your commands; protocol logging can be processor-intensive.

OSPF Log Example

Monitoring in Real-Time

The monitor command is used to enable protocolspecific logging.

It can also be used to enable real-time viewing of any logging, including end-user transit traffic if logging is enabled on a feature rule.

To use real-time monitoring:

  • Enable logging for the appropriate protocol or feature
  • Enable monitoring for the protocol or feature

Real-Time Monitoring Example

User Management

Creating “Login” User Accounts

Scenario on R3:

  • User ID: john
  • Full Name: John Smith
  • Plaintext Password: lab123

The End of The Word

That’s information “Supporting BCVRE Study Guide Chapter 9 Logging and Packet Captures” who can admin convey. Hope it is useful.

If you liked this article, don’t forget to click on the bell on the bottom right to get our updated information. And follow along too fans page facebook , chanel youtube and we instagram. Apart from that, we also have a collection of source code at GitHub. Thank you

Gravatar Image adalah tempat belajar blogger pemula dan profesional. Kamu bisa menemukan kami di sosial media berikut Facebook | Youtube | Instagram. Ingin bekerja sama dengan kami, silahkan hubungi kami.

Leave a Reply

Your email address will not be published. Required fields are marked *