Failures on Using Spanning Tree | NEC IP8800/S2400, IP8800/S6600

3.Troubleshooting Functional Failures in Operation

[When Type displayed is Dot1x]

See "3.12.1 Communication Failure on Using IEEE 802.1X."

[When Type displayed is Wa]

See "3.12.2 Communication Failure on Using Web Authentication."

[When Type displayed is Macauth]

See "3.12.3 Communication Failure on Using MAC Authentication."

•Flooding is executed if the MAC address is not displayed.

•IP8800/S6700, IP8800/S6600, and IP8800/S6300:

If the communication still has been blocked despite no display appears, check to see if learning is suspended by MAC address learning limitation. In addition, check to see if the threshold in the Storm Control function is not too low.

•IP8800/S3600 and IP8800/S2400:

If the communication still has been blocked despite no display appears, check to see if the Suppress Port-to-Port Forwarding has been enabled. In addition, check to see if the threshold in the Storm Control function is not too low.

(b)Checking MAC address learning limitation [IP8800/S6700] [IP8800/S6600] [IP8800/S6300]

Execute the show mac-address-tablecommand with "learning-counter" parameter specified to check the information of MAC address learning limitation for the port and the VLAN to be checked.

>show mac-address-table learning-counter port 1/1-6
Date 2005/09/21 20:00:57 UTC
Port counts:6		Maximum Threshold		Status
Port	Count	Maximum Threshold		Status
1/1	3	-	-	-
1/2	1000	1000	800	Learning
1/3	0	-	-	-	<---1
1/4	50	60	40	Stop learning	<---1
1/5	45	60	40	Learning
1/6	0	60	40	Learning
>show mac-address-table learning-counter vlan
Date 2005/09/21 20:00:57 UTC
VLAN counts:4		Maximum Threshold		Status
ID	Count	Maximum Threshold		Status
1	3	-	-	-	<---1
100	1000	1000	800	Stop learning	<---1
200	0	-	-	No learning	<---2
4095	90	100	100	Learning

1.MAC address learning is suspended according to the MAC address learning limitation value. Frames from the unlearned source address are discarded without learning the MAC address. However, flooding is executed for frames of VLAN for which MAC address learning is suppressed.

2.Suppression of MAC address learning is set. Flooding is executed for received frames.

(4) Checking filtering/QoS

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. For the procedure, see "3.23.1 Checking Filtering/QoS Setting Information."

3.5.2Failures on Using Spanning Tree

If the spanning tree function is in use and a layer 2 communication failure occurs or the spanning tree operation status does not comply with the network configuration, isolate the problem according to the analysis method listed below. For the multiple spanning trees, check for each CIST or MST instance. For example, read the CIST route bridge or the route

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.

NEC IP8800/S2400, IP8800/S6600 manual Failures on Using Spanning Tree, Checking filtering/QoS

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