Scenario 8 Dual GNEs on a Subnet | Cisco Systems ONS 15600 specification

Chapter 9 Management Network Connectivity

9.2.8 Scenario 8: Dual GNEs on a Subnet

Figure 9-13 Nodes Behind a Firewall

	Firewall
Unprotected	ONS 15600
Unprotected	Private
network	network

CTC computer

	Port
	filtering	ONS 15600
		ONS 15600
External network	Protected network

IIOP port

78337

Figure 9-14shows a CTC computer and ONS 15600s behind firewalls. For the computer to access the ONS 15600, you must provision the IIOP port on the CTC computer and on the ONS 15600. Each firewall can use a different IIOP port. For example, if the CTC computer firewall uses IIOP port 4000, and the ONS 15600 firewall uses IIOP port 5000, 4000 is the IIOP port you provision for the CTC computer and 5000 is the IIOP port you provision for the ONS 15600.

Figure 9-14 CTC Computer and ONS 15600s Residing Behind Firewalls

IIOP port

Private

network

CTC computer

Port

filtering

Protected network

Firewall	Firewall		ONS 15600
	Unprotected		ONS 15600
	Unprotected		Private
	network		network
		Port
		filtering	ONS 15600
External network		Protected network

IIOP port

78338

If you implement the proxy server, note that all DCC-connected ONS 15600s on the same Ethernet segment must have the same gateway setting. Mixed values produce unpredictable results, and might leave some nodes unreachable through the shared Ethernet segment.

If nodes become unreachable, correct the setting by performing one of the following actions:

•Disconnect the craft computer from the unreachable ONS 15600. Connect to the ONS 15600 through another network ONS 15600 that has a DCC connection to the unreachable ONS 15600.

•Disconnect all DCCs to the node by disabling them on neighboring nodes. Connect a CTC computer directly to the ONS 15600 and change its provisioning.

9.2.8Scenario 8: Dual GNEs on a Subnet

The ONS 15600 provides GNE load balancing, which allows CTC to reach ENEs over multiple GNEs without the ENEs being advertised over OSPF. This feature allows a network to quickly recover from the loss of a GNE, even if the GNE is on a different subnet. If a GNE fails, all connections through that GNE fail. CTC disconnects from the failed GNE and from all ENEs for which the GNE was a proxy and

Cisco ONS 15600 Reference Manual, R7.2

9-17

ONS 15600 specifications

Cisco Systems ONS 15600 is a highly versatile optical networking platform designed to meet the demands of modern telecommunications and data services. This multiservice edge platform supports various transmission mediums and offers a wide array of features that enable efficient data transport. Ideal for service providers and large enterprises, the ONS 15600 is engineered to provide scalable and reliable optical transport solutions.

One of the notable features of the ONS 15600 is its capability to support multiple protocols, including SONET/SDH, Ethernet, OTN, and legacy TDM services. This flexibility allows users to tailor their networks according to specific service requirements while ensuring interoperability with existing infrastructure. The platform is designed to facilitate seamless service migration, accommodating both legacy and next-generation services.

The modular architecture of the ONS 15600 enhances its scalability. It allows for easy expansion by incorporating additional line cards or interface modules without requiring significant downtime. This modularity ensures that service providers can evolve their networks over time, responding to increasing bandwidth demands and new service offerings with ease.

Incorporating advanced technologies, the ONS 15600 employs Dense Wavelength Division Multiplexing (DWDM), significantly increasing the capacity of fiber networks by allowing multiple signals to be transmitted simultaneously over a single optical fiber. This capability helps to optimize fiber utilization and reduce operational costs. In addition, the platform supports Optical Transport Network (OTN) for improved error detection and correction, contributing to higher reliability and performance.

Another key characteristic of the ONS 15600 is its robust management capabilities. The platform can be managed through Cisco's Optical Networking Manager (ONM), providing a centralized interface for network configuration, monitoring, and troubleshooting. This enhances operational efficiency and minimizes downtime, allowing service providers to focus on delivering quality services to their customers.

The ONS 15600 also prioritizes security, offering various features like encryption and access control to safeguard sensitive data during transmission. With its combination of scalability, flexibility, and security, the Cisco ONS 15600 stands out as a reliable choice for organizations looking to enhance their optical networking capabilities while meeting the evolving demands of the digital landscape. Its commitment to quality and performance makes it a cornerstone of modern optical networks.

Cisco Systems ONS 15600 manual Scenario 8 Dual GNEs on a Subnet, Nodes Behind a Firewall

Models: ONS 15600

Figure 9-13 Nodes Behind a Firewall

Figure 9-14 CTC Computer and ONS 15600s Residing Behind Firewalls

9.2.8Scenario 8: Dual GNEs on a Subnet

ONS 15600 specifications