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Patch Release Note

PCR: 03872

Module: SWI

Level: 3

When typing “?” at the command line after SET SWITCH PORT, INGRESSLIMIT was incorrectly displayed as a valid option. This issue has been resolved.

PCR: 03879 Module: DHCP

Level: 2

A memory leak was occurring with DHCP. This issue has been resolved.

PCR: 03880

Module: SWICX, SWI

Level: 2

Uplugging the remote receive port on the 32FX card (AT-SB4352) was causing the switch to lock-up. This issue has been resolved.

PCR: 03887 Module: SWCX

Level: 2

When the speed and duplex settings of a port were configured with the SET SWITCH PORT SPEED command, the port sometimes erroneously advertised auto-negotiation capabilities, usually when ports were configured with a startup script. This issue has been resolved so that switch ports will not advertise any capabilities when configured with fixed speed and duplex settings.

PCR: 03888

Module: DHCP, TELNET

Level: 2

When the device was configured as a DHCP server, a fatal error sometimes occurred when a Telnet session to the device was closed while DHCP was reclaiming IP addresses. Also, a Telnet error message displayed an incorrect value when a telnet command line parameter was repeated (for example, SHOW TELNET TELNET). These issues have been resolved.

PCR: 03889

Module: IPV6

Level: 2

Packets were not routed when an IPv6 flow was enabled. This issue has been resolved.

PCR: 03890

Module: IGMP, SWI

Level: 2

The switch was adding a router port for multicast packets to destinations with an address in the range 224.0.0.x. Switch port entries are now only created for special router multicast addresses.

PCR: 03891 Module: CORE

Level: 3

When the configurable temperature threshold had not been set, its value should show as “Undefined” in the output of the SHOW SYSTEM command, but it showed the same value as the fixed temperature threshold. This issue has been resolved.

PCR: 03899 Module: CORE

Level: 2

A fatal error sometimes occurred during persistent hotswapping of line cards if the cards were inserted or removed before waiting for a message like the following examples to appear:

Info (1034266): Board AT-SB4411 8-1000T(RJ45) hot-inserted

Info (1034268): Board AT-SB4411 8-1000T(RJ45) hot-swapped out

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 03879 Module Dhcp Level, PCR Module SWICX, SWI Level, PCR 03887 Module Swcx 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.