Caveats

Note When the Cisco ONS 15600 is used in the Data Communications Network (DCN) as a Gateway Network Element (GNE), Cisco Systems, Inc. recommends that:

a. Each Cisco ONS 15600 GNE should cater to no more than 64 Data Communications Channels (DCC)-connected External Network Elements (ENE).

b. No ENE should be more than 8 DCC hops away from its GNE.

c. With large networks, the Cisco Transport Controller (CTC) Java Virtual Machine (JVM) Heap Size should be set to 512 MB (default is 128 MB).

d. When running R7.2.1 and above, the ONS 15600 GNE should be declared a SOCKS proxy in CTC preferences.

e. The number of simultaneous CTC sessions on the network should be limited to five.

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When an ASAP card 1PIO that has STS1 circuits on it is removed, the downstream NE will see UNEQ-P on the STS1 circuits instead of AIS-P, as expected. Concatenated circuits will see AIS-P, as expected. This issue does not occur with 4PIO removals, or with concatenated circuits. This issue will be resolved in a future release.

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When you perform a Manual Switch To Protect and then an SD-L condition is raised on the Protect port that preempts the Manual Switch To Protect, the CTC Maintenance > Protection tab shows “APS_CLEAR.” When you click Clear in that tab while the SD-L is still present on the protect port, the

Kbytes will change to “No Request” for about 400-1000 frames before redeclaring the SD-L condition. This issue can occur on ONS 15600 ASAP cards with 1+1 protection. It does not affect other cards or protection schemes. This issue does not affect traffic. This issue can only occur when using the CTC Maintenance > Protection tab under the aforementioned conditions. To avoid this issue, do not click Clear when the CTC Maintenance > Protection tab shows “APS_CLEAR” and SD-L is present on the protect port. This issue will be resolved in a future release.

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A CTC client session can disconnect from an ONS node during simultaneous deletion of large numbers of VT level circuits (3000+). Connectivity to the node will recover without any user action. If the condition persists, restart the CTC session to reconnect. This issue is under investigation.

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ONS platforms support only a single OSPF virtual link. This issue will be resolved in a future release.

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Network connectivity could be lost if a backbone area becomes segmented into multiple GNEs. This occurs only if multiple ONS 15600 nodes and routers are connected to the same LAN in OSPF area 0. If a link between two routers breaks, the CTC session connected to Router 1 will not be able to communicate with the ONS 15600 connected to Router 2. To resolve, you must repair the link between the routers or provide another form of redundancy in the network. This is as designed.

Release Notes for Cisco ONS 15600 Release 8.0

 

OL-10906-01

3

 

 

 

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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.
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