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

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PCR: 03329

Module: IPG

Level: 2

Each new entry into the IP routing table resulted in an ARP request being sent to resolve the next hop address. To prevent ARP flooding, a limit of 6 simultaneous ARP requests are transmitted.

PCR: 03331 Module: SWI, VLAN

Level: 2

Changing a port’s VLAN tagging was not updating the L3 multicasting entries for that port. This issue has been resolved.

PCR: 03332

Module: TTY

Level: 4

A log message is now created when a user is forced to logout from an asynchronous port when another user (i.e. someone connected via Telnet) resets the asynchronous connection with the RESET ASYN command.

PCR: 03333

Module: IPG

Level: 3

After VRRP was enabled, the link status of the switch ports was shown as UP, even if there was no connection to the ports. This issue has been resolved.

PCR: 03335

Module: SWI

Level: 2

Broadcast storm control (BCSC) rate limiting was not operating on broadcast packets when set per VLAN. This issue has been resolved.

PCR: 03341

Module: STP

Level: 3

STP ignores some BPDU packets coming in on tagged ports. This issue has been resolved. Now the VLAN tag is ignored on all devices except Rapier i Series Switches with multiple STPs on the receiving port.

PCR: 03342

Module: IPV6

Level: 3

Multicast Listener Discovery (MLD) was not setting the filter mode correctly when receiving certain packet types whilst in EXCLUDE mode. This issue has been resolved.

PCR: 03343

Module: UTILITY

Level: 4

Entering a “?” on the command line, now displays the correct list of available options.

PCR: 03345

Module: IPG

Level: 4

The RESET IP COUNTER=ALL command was not working correctly when issued from the command line. This issue has been resolved.

PCR: 03346 Module: SNMP

Level: 4

Sometimes the Agent Address field in SNMP traps was not the same as the IP source address. This meant that sometimes the NMS did not send an alarm to the network manager when traps were received from switches. This issue has been resolved.

PCR: 03349

Module: BGP

Level: 3

When there were a large number of BGP routes, the SHOW BGP ROUTE command sometimes caused an error. 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 03331 Module SWI, Vlan 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.