Allied Telesis SB251-13 manual

Models: SB251-13

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

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ENABLE IP ARP LOG

To disable it, use the command:

DISABLE IP ARP LOG

The logging of MAC addresses is disabled by default. Use the SHOW LOG command to view the MAC addresses that have been logged when the ARP cache changes.

PCR: 02583

Module: FIREWALL

Level: 2

UDP packets passed through the firewall by a reverse enhanced NAT rule were getting an incorrect IP checksum. This caused IP to discard the packets. This issue has been resolved.

PCR: 03032

Module: SWI

Level: 3

If the ENABLE IP IGMP command was executed before the ENABLE SWITCH L3FILTER command, Layer 3 filtering did not discard packets destined for the CPU. This issue has been resolved.

PCR: 03035

Module: OSPF

Level: 3

Erroneous Link State Advertisements (LSA’s) were being sent whenever the Designated Router was removed from the network. This issue has been resolved.

PCR: 03044

Module: BGP

Level: 2

During route flapping, peers were sometimes not told about routes to the same destinations as the flapping routes. This issue has been resolved.

PCR: 03059

Module: FIREWALL

Level: 3

SMTP proxy was falsely detecting third party relay under some

 

circumstances. This issue has been resolved.

 

PCR: 03062

Module: SWI

Level: 4

Previously, Get or GetNext port state information could not be obtained from the dot1dTpPortTable and the dot1dStpPortTable. This issue has been resolved.

PCR: 03067 Module: DHCP

Level: 1

When replying to a DHCP REQUEST that had passed through a DHCP relay, the broadcast bit of DHCP NAK messages was not being set. This issue has been resolved in accordance with RFC2131.

PCR: 03070

Module: BGP

Level: 2

When BGP imported other route types, it would advertise routes that had next hops of the BGP peers themselves. The BGP peers would reject these routes and close the peering session, thus preventing the exchange of routing information between BGP peers. This issue has been resolved.

PCR: 03072

Module: BGP

Level: 4

The Import parameter of the ADD, SET, DELETE and SHOW BGP commands now has an INTERFACE type. INTERFACE routes were previously grouped with STATIC routes.

PCR: 03078

Module: SWI,VLAN

Level: 3:

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

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Allied Telesis SB251-13 manual

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.