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Patch Release Note

Features in SB251-01

PCR: 02555

Module: SWI

Network affecting: No

Layer 2 filtering is now working correctly.

PCR: 02561

Module: SWI

Network affecting: No

32 bit counters now only show 8 bit contents.

PCR: 02563

Module: SWI

Network affecting: No

The IPM (Layer 3 Multicasting table) now updates correctly to add or delete the ingress linecard to control blade ports, and the control blade to egress linecard ports when updating forwarding.

PCR: 02568 Module: CORE

Network affecting: No

The ENABLE SYSTEM SECURITY_MODE command was enabling the system security mode, but after the switch was restarted the system security mode was disabled again. Also, when NVS was re-initialised because, for example a battery had been exhausted, the system could not make an SNMP trap. These issues have been resolved.

PCR: 02576

Module: SWI

Network affecting: No

When the DISABLE SWITCH PORT FLOW=PAUSE command was executed on a port or ports, they would still appear to be enabled at a higher level. This issue has been resolved.

PCR: 02396 Module: DHCP

Network affecting: No

DHCP RENEW request messages are now unicast (as defined in the RFC), not broadcast.

PCR: 02575

Module: SWI

Network affecting: No

VLAN tagged multicast packets were incorrectly being sent over untagged

VLAN interfaces. This issue has been resolved.

PCR: 02574 Module: DVMRP

Network affecting: No

Some change actions, and the resending of prune messages were not operating correctly. This issue has been resolved.

PCR: 02582

Module: SWI

Network affecting: No

Pause flow control is now disabled by default on all ports. This improves performance of the switch when it is congested.

PCR: 02587

Module: OSPF

Network affecting: No

When OSPF was enabled on startup, an OSPF interface would sometimes stay in the DOWN state. This issue has been resolved.

PCR: 03001

Module: SWI CLASSIFIER

Network affecting: No

The following parameters have been changed CREATE CLASSIFIER, SET

CLASSIFIER and SHOW CLASSIFIER commands:

•The MACTYPE parameter has been changed to MACTYPE={L2UCASTL2MCASTL2BCASTANY}. This resolves an error with internal hardware tables.

Patch SB251-01 for Software Release 2.5.1 C613-10361-00 REV A

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Allied Telesis manual Features in SB251-01
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SB251-01 specifications

The Allied Telesis SB251-01 is a state-of-the-art networking switch designed to meet the demands of modern enterprises. This robust device offers a blend of features, technologies, and characteristics that ensure reliable connectivity and impressive performance for various network applications.

At its core, the SB251-01 is a Layer 2 managed switch that provides a rich set of capabilities, making it an ideal choice for small to medium-sized businesses. One of its standout features is the support for Power over Ethernet (PoE), allowing it to deliver power and data to connected devices such as IP cameras, wireless access points, and VoIP phones over the same Ethernet cable. This significantly simplifies installation and reduces the need for additional power sources.

The switch includes multiple Ethernet ports with a mix of 10/100/1000 Mbps speeds, enabling flexible network configurations and allowing businesses to scale their network as needed. The SB251-01 is equipped with advanced switching technologies, including Ethernet Switching and VLAN (Virtual Local Area Network) support, which facilitates better network segmentation and enhances security by isolating different network segments.

In terms of management and monitoring, the Allied Telesis SB251-01 offers a user-friendly web interface and supports Simple Network Management Protocol (SNMP), allowing IT administrators to oversee network performance and troubleshoot issues efficiently. The ability to configure Quality of Service (QoS) settings ensures that critical applications receive the necessary bandwidth and low latency required for optimal performance.

Additionally, the switch incorporates features such as Spanning Tree Protocol (STP) for loop prevention and Link Aggregation Control Protocol (LACP) for enhanced bandwidth utilization. These technologies contribute to a more resilient network infrastructure with improved fault tolerance.

The SB251-01 is designed with energy efficiency in mind, reducing operational costs while maintaining high performance. Its compact form factor allows for easy deployment in various environments, whether in a data center or an office setting.

In conclusion, the Allied Telesis SB251-01 is a versatile and powerful managed switch that stands out for its rich feature set, including PoE support, VLAN support, QoS, and energy efficiency. With its advanced switching technologies and user-friendly management options, this switch is well-equipped to support the networking needs of contemporary businesses, providing a solid foundation for growth and innovation.
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