Tunnel Switching, Primary and Resilient Tunnels

Resilient Tunnel

Figure 67: Primary and Resilient Tunnels

Resilient Tunnels are used for backing-up Primary Tunnels.

Should a Primary Tunnel go out of service, the Resilient

Tunnel will automatically be used for VPN traffic.

Primary Tunnel

Tokyo LAN

San Francisco LAN

High-speed

Router

VSU

LAN

VSU A

Router

WAN

HUB

LAN

Router

VSU

Low-speed

Resilient Tunnel

Tunnel Switching

The switching mechanism involves time and a packet called a Heartbeat. Figure 68 illustrates how tunnels are switched.

Figure 68: Tunnel Switching

		1
		2
Control End-point:		5	Primary
tunnel switching is			Primary
tunnel switching is		6	End-point
controlled here.		6	End-point
controlled here.
			High-speed
	VSUA Router	WAN	Router VSUB
LAN	VSUA Router	WAN	HUB	LAN
			Router VSUC
			Low-speed
		4	Secondary
		4	End-point
		3	End-point
		3

Explanation for Figure 68

1.VSUA listens to VSUB’s heartbeat. The heartbeat has a configurable period called a Heartbeat Interval.

2.If VSUA realizes a dead heartbeat, it asks VSUB for a heartbeat.

3.The number of times that VSUA can make a request is configurable, and is called the Heartbeat Retry Limit.

4.If the number of requests exceeds the Heartbeat Retry Limit, VSUA then begins to establish a connection with VSUC.

5.Since VSUC uses a low-speed connection, VSUA must anticipate a delayed response from VSUC. That delay is called Hold-up Time, and is configurable with VPNmanager Console.

Issue 4 May 2005 213

3.7 specifications

Avaya 3.7 represents a significant evolution in unified communications technology, designed to enhance collaboration and streamline communication workflows for organizations of all sizes. As a cornerstone of Avaya's offerings, this version incorporates a range of features and improvements that cater to contemporary business needs, emphasizing flexibility, reliability, and seamless integration.

One of the most notable features of Avaya 3.7 is its robust call management capabilities. The platform allows users to manage calls effectively through a user-friendly interface, enabling intuitive functionalities such as drag-and-drop call handling, call forwarding, and conference calling. These features help employees stay connected, facilitating better communication and teamwork across departments.

In terms of mobility, Avaya 3.7 supports mobile applications that allow users to access the system remotely. This is particularly advantageous for businesses with a workforce that relies on remote or hybrid work models. The mobile integration ensures users can make and receive calls, check voicemail, and manage their schedules directly from their smartphones, maintaining productivity regardless of location.

The system also embraces advanced collaboration tools, such as video conferencing and instant messaging. These features promote a more dynamic interaction environment, fostering real-time communication among team members. Video conferencing capabilities allow for high-definition video quality and reliable connectivity, making virtual meetings more engaging and effective.

Security is another critical characteristic of Avaya 3.7. The platform includes enhanced encryption protocols to protect sensitive communications and ensure data integrity. With cybersecurity remaining a top concern for businesses, Avaya has prioritized the security of its communications solutions, safeguarding organizations' information against potential threats.

Furthermore, Avaya 3.7 benefits from the incorporation of AI and analytics. These technologies provide businesses with valuable insights into communication patterns and user behavior, enabling them to optimize their processes. The analytics can help identify areas for improvement and drive informed decision-making, thus enhancing overall efficiency.

Interoperability with existing systems is another hallmark of Avaya 3.7. The platform easily integrates with various applications and services, allowing businesses to leverage their current technology investments and create a cohesive communication ecosystem.

In summary, Avaya 3.7 stands out as a comprehensive communication solution that addresses the modern demands of the workplace. With its advanced call management features, mobility support, collaboration tools, strong security measures, and integration capabilities, Avaya 3.7 positions itself as a vital asset for organizations aiming to enhance their communication strategies and drive business success.

Avaya 3.7 manual Tunnel Switching, Primary and Resilient Tunnels

Models: 3.7

Resilient Tunnel

Figure 67: Primary and Resilient Tunnels

Tokyo LAN

Tunnel Switching

Figure 68: Tunnel Switching

3.7 specifications