Instruction/ maintenance manual of the product V7300 3Com
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http://www.3com.com/ Part Number 900-0153-01 AA Published August 2004 3Com ® V7300 V oice Applications Suite Unified Messaging Suite Intelligent Mirr oring Guide VCX ™ V7000 IP Telephony Solution System Release 5.
3Com Corporati on 350 Campus Drive Marlbor ough, MA 01752-3064 Copyright © 2004, 3Com Corporation. All right s reserved. No part of this documentation may b e reproduced in any form or by any means or used to make any derivative work (such as translation, transformation , or adaptation) without written permission fro m 3Com Corporation.
3 C ONTENTS A BOUT T HIS G UIDE Assumptions 5 Conventions 5 Notices 5 T ext 6 Related Docum entation 6 Y our Comments 7 I NITIAL C ONFIGURATION Overview 9 Hardwar e Prerequisites 9 IP Configuration 10.
4 Balanced Intelligent Mirroring Policy 22 Switching Between Active and Standby States 22 O PERATION V erifying Intelligent Mirroring Operation 25 Manual Switchover 26 V erifying Ser ver Synchron izat.
A BOUT T HIS G UIDE This chapter contains an overview of this guide, lists guide conventions, related documentation, and product compatibility . Assumptions This guide is inten ded for system administ.
6 A BOUT T HIS G UIDE Te x t Ta b l e 2 lists text conventions that are used in this guide. Related Documentation The following lists 3Com documents that contain additional information about the products in this re lease.
Your Comments 7 Y our Comments Y our suggestions are important to us because we want to make our documentation more useful to you. Please send e-mail comments about this guide or any of the 3Com V oice Pr oducts documentation and Help systems to: VOICE_Techpubs_comments@3com.
8 A BOUT T HIS G UIDE.
1 I NITIAL C ONFIGURATION This chapter provides an overview of how to configure Intelligent Mirroring on a Primary and Seco ndary server for the V7300 V oice Applications Suite. Intelligent Mirroring is the mirr or ing of application data on two independently running servers.
10 C HAPTER 1: I NITIAL C ONFI GURATION IP Configuration 3Com recommends that you define the IP configuration usin g the /etc/hosts files on the two systems. The /etc/hosts file on each server must contain identical information about the Intelligent Mirroring configuration.
IP Configuration 11 CAUTION: IP addresses 192.168.126.3 and 192.168.126.4 are the dynamic alias IP addresses. Do not associa te them with any network interface.
12 C HAPTER 1: I NITIAL C ONFI GURATION Figure 1 Dual Network Configuration System 1 (Primary Server) ■ System Name — voipbox1 ■ IP Address (subnetwork 126) — 192.168.126.1 (associated with the primary network interface on the Primary Server) ■ IP Address (subnetwork 127) — 192.
Domain Name System (DNS) Conf iguration 13 Sample /etc/hosts File Entries for a Dual Network Configuration This section describes entries that you would add to the /etc/ho sts file if your configuration was identical to the config uration examples listed earlier in this section.
14 C HAPTER 1: I NITIAL C ONFI GURATION 3 Restart the named ser vice on the DNS server to update the ser ver settings with the new configuration information. For any PC on which you intend to run an e-mail client program, configure the PC so that it uses, as its primary DNS server , the DNS server that you have just configured.
Domain Name System (DNS) Conf iguration 15 Sample file "vcx.wan.3com.com" $TTL 86400 @ IN SOA vcx.wan.3com.com. roo t.vcx.wan.3com.com. ( 200210210; serial, todays date + tod ays serial # 8H.
16 C HAPTER 1: I NITIAL C ONFI GURATION Enabling Secure Copy (SCP) and Secure Shell (SSH) Commands UMS uses shell scripts to synchr oniz e the two servers. These scripts use the SCP and SSH commands. Fo r thes e commands to work properly in this environment, you must configure each UMS server so that the commands do not prompt for a passwor d.
Network Time Protocol (NTP) Configuration 17 oscillator to stratum 8 in order to allow the two systems to use a lower stratum server (7 or lower) if one is available. By default, the system uses this drift file: /etc/ntp/drift . 3 On the voipbox2 system, create the /etc/ntp.
18 C HAPTER 1: I NITIAL C ONFI GURATION.
2 I NSTALLATION This chapter describes how to insta ll Intelligent Mirr oring on the Primary Server and the Se condary Server . Overview Follow these instructions, in the or d er that they are given , when you install and configure the servers. 1 Completely install the Pr imary Server before you begin to install the Secondary Server .
20 C HAPTER 2: I NSTALLATION Sample Installation Script (for voipbox1) When you first start a VCX V7000 server , a firstboot script is run. Th e script asks you questions and conf igures the software based on your answers.
Intelligent Mirroring Active/Standby Policy 21 The example answers in this script assume that you are using voipbox2, that voipbox2 will be the secondar y se rver , and that voipbox1 will be the primary ser ver .
22 C HAPTER 2: I NSTALLATION For new installations, the policy is set to Primary by default. T o configure the primary policy: 1 Edit this f ile on the P rimary Server : /usr/app/app.
Intelligent Mirroring Active/Standby Policy 23 When the Primary Server is in t he standby state, it periodically checks th e value of IM_policy and, depending on the value, the Primary Server may switch from the standby state to the active state. ■ If IM_policy is set to primary , a 5- minute timer is activated.
24 C HAPTER 2: I NSTALLATION.
3 O PERATION This chapter describes how to verify the proper operation of Intelligent Mirr oring and sync hronizati on between the servers. It also describes how to manually switch server states a nd how to resynchronize the databases and file systems on the two serv ers if that becomes necessary .
26 C HAPTER 3: O PERATION Manual Switchover Y ou can manually switch either server to the active or standby state, provided that you have r oot privileges.
Verifying Server Synchronization 27 If the databases are not synchr onized, you see a list of the recor ds that are dif ferent. The synchronization of the Primar y a nd Secondar y ser vers is a real-time activity . The tblcmp utility gives accura te results only on an idle system (one that is not pr ocessing telephone calls).
28 C HAPTER 3: O PERATION This command creates a shell script (/usr/app/app.dir/dif fmsg.rcp) that you can run from the command line to copy the missing files from the other server .
I NDEX B balanced mirroring, policy 22 C comments on documentation 7 configuration dual network 11 ha rdw a re 9 IP addresses 10 overview 9 single network 10 conventions text 5 D database synchronizat.
30 I NDEX synchronizing databases 27 file systems 27 servers 26 time 16 with scp and ssh co mmands 16 T time synchronization 16 U users, intended 5 V verifying database synch ronization 27 file system.
An important point after buying a device 3Com V7300 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought 3Com V7300 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data 3Com V7300 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, 3Com V7300 you will learn all the available features of the product, as well as information on its operation. The information that you get 3Com V7300 will certainly help you make a decision on the purchase.
If you already are a holder of 3Com V7300, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime 3Com V7300.
However, one of the most important roles played by the user manual is to help in solving problems with 3Com V7300. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device 3Com V7300 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
