3.Troubleshooting Functional Failures in Operation

(d) Identifying the extent of the failure (performed from this system)

If no failure is found on this system, a failure may exist somewhere in the route between this system and the remote system. The procedure to locate the failure in the route to the remote system and identify the failure range is as follows:

1.Log in to the system.

2.If a router is provided between the DNS server and DHCP server, use the ping command to verify communication of the system (router) between the DHCP server and the other system (DNS server) to which communication is disabled. If communication to the other party cannot be verified with the ping command, use ping to check communication toward clients starting from the system closest to this system. For an example of issuing ping and how to interpret the result, see the manual "Configuration Settings."

3.If the DNS server and DHCP server are directly connected, check the HUB and cable connections.

4.Depending on the extent of failure detected by the ping command, that is the neighboring system or remote system, proceed to the next step in the failure analysis flow.

(e) Checking route information

Check the route information acquired by this system if communication is not possible even when the address resolution with the neighboring system is achieved, or if communication is disabled in the midway to the other party, or if the route to the other party is abnormal. Use the following procedure:

1.Log in to the system.

2.Execute the show ip route command to check the route information acquired by this system.

(f)Checking filtering/QoS setting information

Only 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.

Check to see if the conditions of filtering and QoS control in the configuration have been set up correctly and if bandwidth monitoring, discarding control, or shaper has been set up appropriately for system operation in system configuration, on this system and on the relay equipment located between the DNS server and DHCP server. For the procedure, see "3.23.1 Checking Filtering/QoS Setting Information."

(g) Checking layer 2 network

If no setting error or failure is found in steps (a) to (f), the layer 2 network may have problem. Check the layer 2 network, referring to "3.5 Layer 2 Network Communication Failure."

60

Page 121 Page 123
Page 122
Image 122
NEC IP8800/S2400, IP8800/S6600, IP8800/S3600, IP8800/S6700, IP8800/S6300 manual Checking route information
Page 121 Page 123

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.
Top Page Image Contents