Node Diversity, Dhcp Relay Support | Cisco Systems ONS 15327

New Features and Functionality

•CTC supports the ability to cross connect an STM circuit to an appropriate size STS circuit (for example, STM1 to STS-3C).

•CTC circuit management functionality provides for SDH circuits.

•To provision an SDH circuit, an appropriate STS-N circuit is defined. The section and line information on the inbound signal will be terminated. The STS-N carries the SDH path information and SDH payload. At the SDH handoff, SDH section and line header information is reintroduced so that an SDH signal departs.

Node Diversity

Release 3.3 supports node diversity as an option during automated circuit provisioning across UPSR segments in a mesh (PPMN) network. This option does not apply to 1:1, unprotected, and BLSR portions of the network. Node diversity means that, except for the source and destination, the circuit’s working and protect paths do not traverse any of the same nodes. This feature ensures that the failure of a single node will not eliminate the benefit of SONET protection.

DHCP Relay Support

Release 3.3 allows Dynamic Host Configuration Protocol (DHCP) requests/responses to traverse the ONS 15327 network. This allows craft PCs to request and receive appropriate IP addresses. In addition, the combination of DHCP relay and Proxy ARP allows the craft PC to work without any ONS 15327 or PC configuration in most subnetting environments. In combination with static route support, the craft PC can work with an ONS 15327 even when multiple nodes on the same DCC share a subnet and other crafts are connected. DHCP relay support includes support for User Datagram Protocol (UDP) and listening on Port 67 (the standard BOOTP/DHCP port). DHCP relay is configured as “on” or “off” in CTC; the default is “off.”

Lamp Test

You can activate ONS 15327 lamp tests from CTC. When the test is invoked, all ONS 15327 LEDs illuminate at the same time for 10 seconds. Bicolored LEDs cycle from green to yellow.

Improved Management Routing

The following improvements have been made to management routing:

•Route advertisement over LAN interface: the surface mechanism (OSPF) eliminates the need to add to static route tables in an affiliate router when a Cisco ONS ring is deployed. Only the node IP address is sent to external systems via OSPF; IP addresses on cards are not sent. You can configure OSPF so that node IPs are not sent. The default configuration is off (not advertising OSPF).

•Craft attachment: Craft attachment and management of all nodes on a DCC (regardless of subnetting) without the addition of static routes to the craft PC is now possible. Automatic Host Detection and Proxy Server are supported to provide this capability. Multiple craft attachments to the same DCC can occur at the same time.

•Route learning and aging support: redundant physical connections to an ONS 15327 ring are supported, including rerouting messages through an alternate route and/or an alternate ONS 15327 gateway. Nodes can reroute messages (including the primary and secondary gateway nodes). This feature is not affected by subnet configuration (all nodes on one subnet, all nodes on different subnets, or any combination).

Release Notes for Cisco ONS 15327 Release 3.3

24	OL-2671-01

ONS 15327 specifications

Cisco Systems ONS 15327 is a high-performance optical networking solution tailored for service providers and enterprises looking to enhance their optical communication infrastructure. This versatile platform is recognized for its robust performance, scalability, and flexibility, making it suitable for a wide array of applications ranging from broadband access to metropolitan area networking.

One of the standout features of the ONS 15327 is its ability to handle multiple data types over a single platform. It supports a rich array of protocols, including Ethernet and SONET/SDH, allowing service providers to deliver a diverse portfolio of services to their customers. This multiservice capability simplifies the network architecture, reducing operational complexity and costs.

The ONS 15327 is designed with a modular architecture, which enables operators to customize and scale their network as demand grows. It supports a variety of card options for different media types, wavelengths, and capacity requirements. This modularity not only facilitates straightforward upgrades but also allows for efficient network management.

In terms of technology, the ONS 15327 leverages dense wavelength division multiplexing (DWDM) capabilities to maximize the utilization of available fiber bandwidth. This allows for an impressive increase in transmission capacity without the need for additional fiber installations, making it a cost-effective solution for expanding networks.

Another significant characteristic of the Cisco ONS 15327 is its advanced performance monitoring and management features. Built-in diagnostic tools provide real-time visibility into network performance, enabling prompt identification and troubleshooting of potential issues. This proactive approach to network management enhances service reliability and customer satisfaction.

Security is also paramount in the ONS 15327. The platform integrates various security features and protocols to protect the data traversing the network, ensuring compliance with industry standards and safeguarding sensitive information.

Furthermore, the equipment is designed for easy integration into existing infrastructures. Its compatibility with Cisco’s broader networking solutions allows for seamless interconnection with routers, switches, and other devices, facilitating comprehensive network solutions.

In conclusion, Cisco Systems ONS 15327 stands out as a powerful optical networking platform that combines versatility, scalability, and advanced management features. Its ability to support various protocols and harness optical technologies makes it an essential tool for organizations aiming to optimize their telecommunications infrastructure while minimizing costs and complexity.