Patch SB251-13 For SwitchBlade 4000 Series Switches and AT-9800 Series Switches

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PCR: 03238

Module: SWI

Level: 2

When RIP interfaces were deleted, the IP routes learned through those interfaces were not timing out correctly. Now, all IP routes learned though a RIP interface are removed when the RIP interface is deleted, and no timeouts occur.

PCR: 03239 Module: QOS

Level: 2

QoS Traffic Class maximum bandwidth limiting was being overwritten by the port or trunk maximum bandwidth value. This should only happen when the Traffic Class maximum bandwidth has not been set manually with the CREATE QOS TRAFFICCLASS MAXBANDWIDTH parameter. This issue has been resolved.

PCR: 03240

Module: OSPF

Level: 2

A fatal error occurred when OSPF was under high load. This issue has been resolved.

PCR: 03244

Module: ETH, IPG

Level: 3

ARP table entries are now deleted when an ETH interface goes down.

PCR: 03245

Module: SWI, IPG, PIM

Level: 2

Multicast streams would not commence forwarding immediately due to IGMP packets initiated but not sent while a VLAN was changing from the DOWN to UP state. Also, multicast streams could be received while the VLAN was changing from DOWN to UP, causing a PIM Reverse Path Forwarding unicast route lookup failure. This was due to the unicast route being unusable as the VLAN was still considered down. These issues have been resolved.

PCR: 03246

Module: SWI

Level: 3

For the SwitchBlade and AT-9800 Series Switches, the TTL egress limit for forwarding IP multicast packets has been increased from 0 to 1. Therefore, only packets with a TTL greater than 1 will be forwarded.

PCR: 03248 Module: VLAN

Level: 4

The error message for an incorrectly added or removed port now displays both the card and the port identifiers.

PCR: 03250

Module: SWI

Level: 4

The DELETE SWITCH FILTER command did not work properly when the ENTRY parameter was assigned a range with hyphen (“-”). This issue has been resolved.

PCR: 03252

Module: PIM

Level: 3

An assert storm sometimes occurred with PIM-DM. 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 03239 Module QOS 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.