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NEC IP8800/S6700, IP8800/S6600 manual Communication Failure Caused by Settings of Filtering/QoS

Models: IP8800/S6700 IP8800/S3600 IP8800/S6600 IP8800/S6300 IP8800/S2400

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3.Troubleshooting Functional Failures in Operation

3.23Communication Failure Caused by Settings of Filtering/QoS

3.23.1Checking Filtering/QoS Setting Information

As a cause for communication failure on the network using this system, certain packets may have been discarded by filtering or packets may have been discarded through bandwidth monitoring, discarding control, or shaper of the QoS control.

If packets are discarded within this system by filtering or QoS control, the procedure for identifying the discarding location is described below.

(1) Checking packet discarding by filtering

1.Log in to the system.

2.Check the filtering conditions of the access list applied to the interface, the number of packets meeting the filtering conditions, and the number of packets discarded according to implicit discarding filter entry by using the show access-filtercommand.

3.Compare the filtering conditions identified in step 2 and the contents of the packet that cannot be exchanged, and see if the packets have been discarded. If the packets that cannot be exchanged do not meet all of the filtering conditions applied, the packets in this example, may have been implicitly discarded.

4.Review to see if setting conditions in filtering configuration are correct.

(2) Checking packet discarding through bandwidth monitoring of QoS control

1.Log in to the system.

2.Check the flow detecting condition and operation designation of bandwidth monitoring applied to the interface and the number of packets meeting the flow detecting conditions by executing the show qos-flowcommand.

3.Compare the flow detecting conditions identified in step 2 and the contents of the packet that cannot be exchanged, and see if the packets have been discarded. The packets which violate maximum bandwidth control are discarded, and "matched packets (max-rate over)" statistical information is incremented. If this statistical information is incremented, packets may be discarded through bandwidth monitoring applied to the interface.

4.Review to see if setting conditions in QoS control configuration are correct and bandwidth monitoring settings in system configuration are proper.

(3) Checking packet discarding through discarding control and shaper of QoS control

IP8800/S6700, IP8800/S6600, and IP8800/S6300

1.Log in to the system.

2.Check the "discard_pkt"statistical information of the port sending/receiving queue for the input interface and output interface used for communication by using the show qos queueing command with "interface" parameter specified.

3.Check the "discard_pkt"statistical information of the distribution sending/receiving queue for accommodating the input interface or output interface used for communication by using the show qos queueing command with "distribution" parameter specified.

4.If the statistical information identified in steps 2 and 3 is incremented, packets are discarded through discarding control of QoS control.

5.Review to see if discard control and shaper have been set up appropriately for the system operation.

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NEC IP8800/S6700 Communication Failure Caused by Settings of Filtering/QoS, Checking Filtering/QoS Setting Information
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IP8800/S6700, IP8800/S3600, IP8800/S6600, IP8800/S6300, IP8800/S2400 specifications

The NEC IP8800 series comprises a range of advanced networking solutions designed for various applications ranging from enterprise networking to service provider environments. This series includes models such as the IP8800/S2400, IP8800/S3600, IP8800/S6300, IP8800/S6600, and IP8800/S6700, each with its unique set of features and capabilities aimed at delivering robust performance, security, and scalability.

The IP8800/S2400 is an entry-level switch tailored for small to medium enterprises. It features a compact design and high port density, making it ideal for network edge applications. The model supports both Layer 2 and Layer 3 switching capabilities, enabling efficient traffic management. With its robust security features, including access control lists and support for VLANs, the IP8800/S2400 ensures secure connectivity.

Moving to the IP8800/S3600, this switch is designed for data center environments and offers high throughput with advanced routing capabilities. It is equipped with high-capacity 10G and 40G Ethernet ports, facilitating faster data transfer rates. The S3600 supports various protocols such as MPLS and Segment Routing, enhancing its ability to manage complex network architectures. Its energy-efficient design also helps reduce operational costs.

The IP8800/S6300 is tailored for high-performance networking scenarios, featuring a flexible architecture that supports both traditional and cloud-based services. With extensive QoS capabilities, the S6300 optimizes traffic flow and manages bandwidth efficiently, ensuring high-quality service delivery. Its virtualization support allows for easier integration into modern, software-defined networking environments.

The IP8800/S6600 provides a comprehensive solution for service providers and large enterprises, boasting high scalability and modularity. This model supports advanced features such as network slicing and the ability to handle high-density 100G interfaces. Its robust management tools, including centralized control and automation capabilities, simplify network operations significantly.

Finally, the IP8800/S6700 represents the pinnacle of the series, designed for mission-critical applications requiring the utmost reliability and performance. It supports advanced analytics, AI-driven insights, and comprehensive telemetry, enabling proactive network management. With high availability features and extensive redundancy options, the S6700 ensures continuous operation, making it ideal for core network functions.

In summary, the NEC IP8800 series offers a versatile range of switches that combine advanced technologies, high performance, and robust security features, catering to various networking needs across different industries. Each model is designed to provide not only superior connectivity but also the flexibility and scalability required in today’s fast-paced digital landscape.