42

Patch Release Note

PCR: 03388 Module: DHCP

Level: 3

The DHCP lease Expiry time showed incorrectly in the SHOW DHCP CLIENT command when the lease straddled across multiple months and years. This issue has been resolved.

PCR: 03390

Module: HTTP

Level: 2

Occasionally a fatal error occurred when the GUI browser started or a page was refreshed. This issue has been resolved.

PCR: 03394

Module: OSI/CLNS

Level: 1

A fatal error sometimes occurred if the SHOW CLNS ROUTE command was executed when a large number of routes had been learned. This issue has been resolved.

PCR: 03395

Module: BGP

Level: 3

The time delay for BGP peers to back off following a transition from an ESTABLISHED to an IDLE state has been changed. Previously the delay grew exponentially and would never decay. It is now fixed at one second.

PCR: 03400

Module: SSL

Level: 3

Under certain conditions, an incomplete SSL handshake, or a TCP packet sent with the FIN bit set but with no data Secure Sockets Layer (SSL), would not allow the TCP session to close properly. Also SSL would leak memory when it received SSL records. These issues have been resolved.

PCR: 03407

Module: IPG

Level: 3

The default for the PROXYARP parameter in the SET IP INTERFACE command for a VLAN interface was OFF. The default is now ON.

PCR: 03412

Module: FIREWALL

Level: 3

FTP data transfers did not succeed for some types of NAT. Also, the presence of flow control TCP flags meant that some TCP control packets were not recognised. These issues have been resolved.

PCR: 03413

Module: BGP

Level: 2

The BGP route table was updated according to the most recently added route. BGP now updates to reflect the best available route, regardless of when it was added.

PCR: 03421

Module: IPG

Level: 2

IP entries were not correctly updated when multiple logical IP interfaces existed on the same VLAN whenever there was a VLAN up or down state change. This issue has been resolved.

PCR: 03423

Module: IP

Level: 4

The ADD IP ROUTE command allowed an incorrect mask to be set for the default route, i.e. to values other than 0.0.0.0. This issue has been resolved and now the only permitted mask value for the default route is 0.0.0.0.

PCR: 03424 Module: DHCP

Level: 2

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

Page 42
Image 42
Allied Telesis SB251-13 manual PCR 03388 Module Dhcp Level, PCR Module OSI/CLNS Level, PCR Module SSL 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.