3Com V7300 Enabling Secure, Copy SCP, Secure Shell SSH, Commands, Network Time, Protocol NTP

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16CHAPTER 1: INITIAL CONFIGURATION

Enabling Secure

 

UMS uses shell scripts to synchronize the two servers. These scripts use

Copy (SCP) and

 

the SCP and SSH commands. For these commands to work properly in

Secure Shell (SSH)

 

this environment, you must configure each UMS server so that the

Commands

 

commands do not prompt for a password.

 

 

Perform these steps on the voipbox1 and voipbox2 servers as user app:

 

1

To create the private and public keys, enter this command:

 

 

ssh-keygen -t dsa

 

2

When you are prompted for a key location, press Enter to accept the

 

 

default.

 

3

When you are asked for a passphrase, press Enter to leave the

 

 

passphrase blank.

Perform these steps on the designated server only, as user app:

1On voipbox1, copy the public key to the voipbox2 using this command:

cat ~app/.ssh/id_dsa.pub ssh app@voipbox2 "cat - >> ~app/.ssh/authorized_keys"..

2On voipbox2, copy the public key to the voipbox1 using this command:

cat ~app/.ssh/id_dsa.pub ssh app@voipbox1"cat - >> ~app/.ssh/authorized_keys"..

Network Time

Intelligent Mirroring requires that the clocks on the two systems be

Protocol (NTP)

synchronized to within 1 second.

Configuration

3Com recommends that you use an external NTP server to maintain time

 

 

synchronization with Universal Time.

Configuration To configure Network Time Protocol on the two systems:

1On the voipbox1 system, create the /etc/ntp.conf file.

2Edit the file and add these lines:

server 127.127.1.1

fudge 127.127.1.1 stratum 8

peer voipbox2

The IP address 127.127.1.1 designates the local oscillator (clock). This entry is required. If no external NTP server is configured or available, the two systems use the local oscillator. The fudge command sets the local

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Contents VCX V7000 IP Telephony Solution System Release 3Com Corporation 350 Campus Drive Marlborough, MA Contents Index Assumptions About this GuideConventions Related DocumentationExample About this Guide Initial Configuration OverviewHardware PrerequisitesExamples in this section are based on these assumptions IP Configuration Initial Configuration Domain Name ConfigurationSystem DNS Mail Server Host Name umsemail Sample named.conf file on the DNS serverVerifying DNS Configuration Sample file vcx.wan.3com.comCommands Enabling SecureCopy SCP Secure Shell SSHAny user can run the ntpq command Initial Configuration Installation InstallationPrimary Server Verify the Primary ServerSecondary Server Secondary ServerIntelligent Switching Between Active and Standby States Intelligent Mirroring Active/Standby Policy Installation Operation Verifying IntelligentMirroring OperationIf the databases are synchronized, you see this message Diffmsg Run this command on the other server Index Synchronizing Databases

V7300 specifications

The 3Com V7300 is a sophisticated network switch designed to cater to the demands of modern enterprise networking. With its robust feature set and advanced capabilities, it is positioned as a critical component in delivering high-performance connectivity.

One of the key features of the 3Com V7300 is its high port density. The switch supports a variety of port configurations, allowing for 10/100/1000 Mbps Ethernet connections. This flexibility ensures that organizations can scale their networks with ease, adapting to growing bandwidth requirements without compromising performance. Additionally, the switch can accommodate both copper and fiber connections, ensuring compatibility with existing infrastructure.

A standout technology integrated into the 3Com V7300 is its support for Layer 3 routing. This allows for intelligent traffic management and enhanced data routing within complex network environments. With Layer 3 functionality, organizations can segment their networks for improved security and performance, as well as enable inter-VLAN routing. This capability is critical for businesses looking to optimize their network efficiency while ensuring secure communication between different network segments.

The V7300 also boasts advanced Quality of Service (QoS) features. This technology prioritizes critical applications and services, ensuring that voice and video traffic receive the bandwidth they require for uninterrupted performance. By implementing QoS policies, organizations can enhance user experience, especially in environments where real-time communications are essential.

Reliability is a cornerstone of the 3Com V7300's design, featuring redundancy options such as dual power supplies and fan units. This ensures that the switch remains operational even in the event of hardware failures, minimizing downtime and maintaining service continuity. The robust management capabilities, including SNMP support, allow IT administrators to monitor the network effectively and respond to issues proactively.

Security features are also a significant consideration with the V7300. It includes access control lists (ACLs), port security, and VLAN support to restrict access and protect sensitive data from unauthorized users. Further, the integration of 802.1X authentication enhances network security by ensuring that only authorized devices can access the network.

In conclusion, the 3Com V7300 stands out as a high-performance network switch suitable for enterprises seeking to future-proof their networking capabilities. With its high port density, Layer 3 routing, advanced QoS, reliability, and robust security measures, it is a solid choice for businesses looking to enhance their network infrastructure.
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