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Patch Release Note

PCR: 03795

Module: SWI

Level: 3

Browsing the dot1dTpFdbPort table with SNMPv2c sometimes gave

 

incorrect output. This issue has been resolved.

 

PCR: 03796

Module: STP

Level: 2

Setting RSTPTYPE to NORMAL, when normal has already been set, sets all ports to the “sending RSTP” state process. This is referred to in IEEE 802.1w as mCheck.

When RSTPTYPE was changed from STPCOMPATIBLE to NORMAL with the SET STP command, the STP instance continued to send STP BPDUs until an mCheck was performed by entering the SET STP RSTPTYPE=NORMAL command again. This issue has been resolved so that when RSTPTYPE is set to NORMAL an mCheck is performed, causing the STP to start sending RSTP BPDUs immediately.

PCR: 03800 Module: LOAD

Level: 2

If a DNS lookup failed when using the UPLOAD command to load a file with a host name, the file was sometimes deleted from FLASH. This issue has been resolved.

PCR: 03801 Module: MLDS

Level: 2

MLD and MLD Snooping accepted MLD Query packets with a hop limit greater than 1. Duplicate packets were forwarded when the hop limit was not 1 and the payload was 0::0. This issue has been resolved. MLD and MLD Snooping now require the hop limit to be 1.

PCR: 03802

Module: FIREWALL

Level: 1

Packets with bad ACK numbers were sometimes generated by the firewall as part of the proxy TCP setup process. These packets sometimes caused TCP sessions from the public side of the firewall to fail. This issue has been resolved.

PCR: 03806

Module: VRRP

Level: 4

After the SHOW VRRP command was executed, incorrect trigger messages were entered into the log. This issue has been resolved.

PCR: 03811

Module: UTILITY

Level: 2

A fatal error sometimes occurred when using hardware filters if DMA debug was enabled. This issue has been resolved.

PCR: 03813

Module: SWI

Level: 2

Rate limiting sometimes prevented IGMP snooping and MLD snooping from operating correctly. This issue has been resolved.

PCR: 03814

Module: SWI

Level: 1

A fatal error occasionally occurred because of an error with internal processing of the control blades. This issue has been resolved.

PCR: 03815

Module: SWI

Level: 3

The SHOW SWITCH HOTSWAP command output displayed more than 4 blades on a 4 blade chassis. This issue has been resolved.

Patch SB251-13 for Software Release 2.5.1 C613-10361-00 REV M

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Allied Telesis SB251-13 manual PCR 03800 Module Load Level, PCR 03801 Module Mlds Level, PCR Module Firewall Level

SB251-13 specifications

The Allied Telesis SB251-13 is a robust Layer 2 managed switch designed to meet the demands of various networking environments. With a comprehensive set of features, it serves as an ideal solution for enterprises looking to enhance their network infrastructure while maintaining performance and reliability.

One of the standout features of the SB251-13 is its 24 Gigabit Ethernet ports, which provide high-speed connectivity essential for modern applications. This switch supports both copper and fiber connections, making it versatile for different deployment scenarios. Additionally, it includes two SFP (Small Form-Factor Pluggable) ports that enable flexibility in uplink configurations, allowing for connectivity over longer distances with fiber optics.

The switch operates on a Layer 2 architecture, which ensures efficient data handling and robust traffic management. With VLAN (Virtual Local Area Network) support, users can segment their networks for improved traffic isolation and security. This feature is particularly beneficial in environments where segmentation is critical for performance and compliance.

Quality of Service (QoS) is another critical characteristic of the SB251-13, enabling priority-based traffic handling. This means that time-sensitive data, such as VoIP or video streams, can be given precedence over less critical traffic. This prioritization enhances the overall user experience and is vital for ensuring the smooth operation of real-time applications.

Allied Telesis also includes advanced security features in the SB251-13, such as port security, MAC address filtering, and access control lists (ACLs). These measures help protect the network from unauthorized access and potential threats, making it suitable for both enterprise and educational environments.

Power over Ethernet (PoE) support is another significant advantage of the SB251-13. This feature allows the switch to provide power to connected devices like IP cameras, phones, and access points, eliminating the need for separate power sources and making installations cleaner and more efficient.

The SB251-13 is also equipped with a user-friendly web-based management interface, facilitating easy configuration and monitoring. Network administrators can quickly set up, manage, and troubleshoot, streamlining operations and reducing downtime.

In conclusion, the Allied Telesis SB251-13 stands out as a sophisticated managed switch that combines performance, security, and manageability. Its rich feature set makes it a valuable asset for organizations aiming to build a reliable and efficient network infrastructure.