Supporting BCVRE Study Guide Chapter 4 DHCP and DNS Troubleshooting
Supporting BCVRE Study Guide Chapter 4 DHCP and DNS Troubleshooting

Supporting BCVRE Study Guide Chapter 4 DHCP and DNS Troubleshooting

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


  • DHCP
  • DNS


DHCP Overview

  • A protocol that allows end stations to request IP configuration information from a local sever rather than having to be manually configured.
  • DHCP can provide several pieces of IP configuration data to the end station, including IP address, IP gateway address, and addresses for IP services, such as DNS servers and WINS servers.
  • DHCP advantages:
    • It centralizes management of IP addresses
    • Available address space is used efficiently
    • DHCP also means less configuration needs to be done on individual end stations
DHCP Overview
DHCP Overview

DHCP on vRouter

For DHCP server functionality, the vRouter has two options:

  • DHCP server. A basic DHCP server setup consists of an address pool, with specific parameters associated with each address pool, including the start and end addresses for the pool, the default router, the address of the DNS server, and other optional parameters.
  • DHCP relay agent. If you have a central DHCP server on a different network segment than your end stations, you can configure the vRouter to forward DHCP requests to hat server.

Sample Topology

Sample Topology
Sample Topology

R1 Configuration

R2 Configuration

Verify R1 Configuration

Verify R2 Configuration


A vRouter participates in DNS services in one of three ways.

  • System DNS, the vRouter acts as a DNS client and needs to resolve host names for its own operations.
    • You can configure a static system DNS server, or the vRouter can acquire the address of its DNS server using DHCP.
  • Dynamic DNS is used when upstream devices use names to reach an address associated with the vRouter, but the address is assigned via DHCP.
  • DNS forwarding. In this case, downstream end stations need to reach DNS services on the Internet. This scenario is common in environments where the vRouter acquires its public addressing and DNS server address via DHCP
Dynamic DNS
Dynamic DNS

Dynamic DNS Configuration

DNS Forwarding

DNS Forwarding
DNS Forwarding

DNS Forwarding Configuration

The End of The Word

That’s information “Supporting BCVRE Study Guide Chapter 4 DHCP and DNS Troubleshooting” 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 *