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GRP2615
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Grandstream GRP2615, GRP2613, GRP2612, GRP2614 User Manual

Grandstream Networks, Inc.
GRP26XX Carrier-Grade IP Phones
DHCP Options Guide - Linux
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Table of Contents
SUPPORTED DEVICES ................................................................................................. 5
INTRODUCTION ............................................................................................................. 6
ENVIRONMENT SETUP ................................................................................................. 7
Step 1: Install DHCP Server ................................................................................................................ 7
Step 2: DHCP Server Basic Configuration ........................................................................................ 7
Start and Stop DHCP service .............................................................................................................. 8
DHCP OPTIONS ................................ ................................ ................................ ............. 9
DHCP Option 42 (NTP Server) ............................................................................................................ 9
DHCP Option 2 (Time Offset) ............................................................................................................ 10
DHCP Option 66 (TFTP Server Name) .............................................................................................. 11
DHCP Option 43 (Vendor Specific Information) .............................................................................. 12
DHCP Option 12 (Host Name) ........................................................................................................... 13
DHCP Option 60 (Vendor Class Identifier) ....................................................................................... 14
DHCP Option 120 (SIP Server) .......................................................................................................... 15
DHCP Option 125 (Vendor-Identifying Vendor Options) ................................................................ 16
DHCP Option 132 (Vlan ID)................................................................................................................ 17
DHCP Option 133 (QoS priority level) .............................................................................................. 18
DHCP Option 150 (TFTP Servers List) ............................................................................................. 19
DHCP Option 160 (Configuration Server Address) ........................................................................ 20
DHCP Option 242 (Avaya IP Phones) ............................................................................................... 21
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Table of Figures
Figure 1: DHCP Flow .................................................................................................................................... 6
Figure 2: Installing isc-dhcp-server ............................................................................................................... 7
Figure 3: isc-dhcp-server file ......................................................................................................................... 7
Figure 4: Edit isc-dhcp-server file ................................................................................................................. 7
Figure 5: “dhcpd.conf” file ............................................................................................................................. 8
Figure 6: “dhcpd.conf” ................................................................................................................................... 8
Figure 7: Restart/Start/Stop Services ........................................................................................................... 8
Figure 8: DHCP Option 42 ............................................................................................................................ 9
Figure 9: DHCP Discover Request for Option 42 ......................................................................................... 9
Figure 10: DHCP Offer Reply for the Option 42 ............................................................................................ 9
Figure 11: DHCP Option 2 .......................................................................................................................... 10
Figure 12: DHCP Discover Request for Option 2 ....................................................................................... 10
Figure 13: DHCP Offer Reply for the Option 2 ............................................................................................ 10
Figure 14: DHCP Option 66 ........................................................................................................................ 11
Figure 15: DHCP Discover Request for Option 66 ..................................................................................... 11
Figure 16: DHCP Offer Reply for the Option 66 .......................................................................................... 11
Figure 17: DHCP Option 43 ........................................................................................................................ 12
Figure 18: DHCP Discover Request for Option 43 ..................................................................................... 12
Figure 19: DHCP Offer Reply for the Option 43 .......................................................................................... 12
Figure 20: DHCP Discover Advertisement for Option 12 ............................................................................ 13
Figure 21: DHCP Option 60 ........................................................................................................................ 14
Figure 22: DHCP Discover Advertisement for Option 60 ............................................................................ 14
Figure 23: DHCP Offer Reply for Option 60 ................................................................................................ 14
Figure 24: DHCP Option 120 ...................................................................................................................... 15
Figure 25: DHCP Discover Request for Option 120 ................................................................................... 15
Figure 26: DHCP Offer Reply for Option 120 .............................................................................................. 15
Figure 27: DHCP Discover Advertisement for Option 125 .......................................................................... 16
Figure 28: DHCP Option 132 ...................................................................................................................... 17
Figure 29: DHCP Discover Request for Option 132 ................................................................................... 17
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Figure 30: DHCP Offer Reply for Option 132 .............................................................................................. 17
Figure 31: DHCP Option 133 ...................................................................................................................... 18
Figure 32: DHCP Discover Request for Option 133 ................................................................................... 18
Figure 33: DHCP Offer Reply for Option 133 .............................................................................................. 18
Figure 34: DHCP Option 150 ...................................................................................................................... 19
Figure 35: DHCP Discover Request for Option 150 ................................................................................... 19
Figure 36: DHCP Offer Reply for Option 150 .............................................................................................. 19
Figure 37: DHCP Option 160 ...................................................................................................................... 20
Figure 38: DHCP Discover Request for Option 160 ................................................................................... 20
Figure 39: DHCP Offer Reply for Option 160 .............................................................................................. 20
Figure 40: DHCP Option 242 ...................................................................................................................... 21
Figure 41: DHCP Discover Request for Option 242 ................................................................................... 21
Figure 42: DHCP Offer Reply for Option 242 .............................................................................................. 21
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SUPPORTED DEVICES

Following table shows Grandstream products supporting DHCP Options:
DHCP Options
1 2 3 6 12
15
28
43
53
55
57
60
61
66
120
125
132
150
160
255
GRP2612
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
GRP2613
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
✓ ✓ ✓ ✓ ✓
GRP2614
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
✓
GRP2615
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
✓
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INTRODUCTION

Dynamic Host Configuration Protocol (DHCP) is a standardized network protocol used on Internet Protocol (IP) networks for dynamically distributing network configuration parameters, such as IP addresses for interfaces and services. With DHCP, network devices request IP addresses and networking parameters automatically from a DHCP server, reducing the need for a network administrator or a user to configure these settings manually.
DHCP servers can be configured to provide optional data that fully configures TCP/IP on a client. Some of
the most common DHCP option types configured and distributed by the DHCP server during leases include
default gateway, router, DNS, and WINS parameters.
This guide describes advanced DHCP options supported on Grandstream products. Administrators can use
these DHCP options for easy setup, to provide specific configuration per device model, synchronize time
with NTP servers, configure ACS server URL on devices and more…
Figure 1: DHCP Flow
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ENVIRONMENT SETUP

This chapter provides steps to setup a minimal test environment to run DHCP options described in this
guide. In this guide, we will use isc-dhcp-server on an Ubuntu 12 machine with static IP 192.168.1.11. Administrators can use other Windows or Linux based DHCP servers at their convenience. Note: This chapter can be skipped if a DHCP server supporting customizing options is already setup.

Step 1: Install DHCP Server

1. Launch a Linux terminal.
2. Login as root by typing sudo su
3. Download and install DHCP server using following command: apt-get install isc-dhcp-server
Figure 2: Installing isc-dhcp-server

Step 2: DHCP Server Basic Configuration

There are two main files to be configured:
/etc/default/isc-dhcp-server (specify network interface to use for DHCP server) /etc/dhcp/dhcpd.conf (all DHCP Options in this guide can be defined in dhcpd.conf file)
1. Enter nano /etc/default/isc-dhcp-server to edit isc-dhcp-server file
Figure 3: isc-dhcp-server file
2. Replace eth0 with the network interface to use for DHCP server.
Figure 4: Edit isc-dhcp-server file
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