Linksys SLM224G4S manual Statistics Rmon Alarms, Add Alarm

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Chapter 5

Configuration Using the Web-based Utility

Broadcast Packets  Displays the number of good Broadcast packets received on the interface since the device was last refreshed. This number does not include Multicast packets.

Multicast Packets  Displays the number of good Multicast packets received on the interface since the device was last refreshed.

CRC Align Errors  Displays the number of CRC and Align errors that have occurred on the interface since the device was last refreshed.

Undersize Packets  Displays the number of undersized packets (less than 64 octets) received on the interface since the device was last refreshed.

Oversize Packets  Displays the number of oversized packets (over 1518 octets) received on the interface since the device was last refreshed.

Fragments  Displays the number of fragments (packets with less than 64 octets, excluding framing bits, but including FCS octets) received on the interface since the device was last refreshed.

Jabbers  Displays the total number of received packets that were longer than 1518 octets. This number excludes frame bits, but includes FCS octets that had either a bad Frame Check Sequence (FCS) with an integral number of octets (FCS Error) or a bad FCS with a non-integral octet (Alignment Error) number. The field range to detect jabbers is between 20 ms and 150 ms.

Collisions  Displays the number of collisions received on the interface since the device was last refreshed.

Utilization  Displays the percentage of the interface utilized.

Statistics > RMON Alarms

The RMON Alarm screen is used to set network alarms. Network alarms occur when a network problem, or event, is detected. Rising and falling thresholds generate events.

Statistics > RMON Alarm

Add Alarm

Alarm Entry  Indicates a specific alarm.

Interface  Indicates the interface for which RMON statistics are displayed. To specify the interface, select Unit No. (default) and specify the unit number and port from the drop-down menus, or select LAG and select the LAG number from the drop-down menu.

Counter Name  Displays the selected MIB variable.

Sample Type  Defines the sampling method for the selected variable and comparing the value against the thresholds. The possible field values are:

•Absolute  Compares the values directly with the thresholds at the end of the sampling interval.

•Delta  Subtracts the last sampled value from the current value. The difference in the values is compared to the threshold.

Rising Threshold  Displays the rising counter value that triggers the rising threshold alarm. The rising threshold is presented on top of the graph bars. Each monitored variable is designated a color.

Rising Event  Displays the mechanism in which the alarms are reported. The possible field values are:

•LOG  Indicates there is not a saving mechanism for either the device or in the management system. If the device is not reset, the entry remains in the Log Table.

•TRAP  Indicates that an SNMP trap is generated, and sent via the Trap mechanism. The Trap can also be saved using the Trap mechanism.

•Both  Indicates that both the Log and Trap mechanism are used to report alarms.

Falling Threshold  Displays the falling counter value that triggers the falling threshold alarm. The falling threshold is graphically presented on top of the graph bars. Each monitored variable is designated a color.

Falling Event  Displays the mechanism in which the alarms are reported. The possible field values are:

•LOG  Indicates there is not a saving mechanism for either the device or in the management system. If the device is not reset, the entry remains in the Log Table.

•TRAP  Indicates that a SNMP trap is generated, and sent via the Trap mechanism. The Trap can also be saved using the Trap mechanism.

•Both  Indicates that both the Log and Trap mechanism are used to report alarms.

Startup Alarm  Displays the trigger that activates alarm generation. Rising is defined by crossing the threshold from a low-value threshold to a higher-value threshold.

24/48-Port 10/100 + 4-Port Gigabit Resilient Clustering Smart Switch with 2 Combo SFPs

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Contents Port or 48-Port 10/100 + About This Guide About This GuideIcon Descriptions Online ResourcesTable of Contents Snmp Gigabit Ethernet Fiber Optic Cabling Appendix B About Switch StackingAppendix C Glossary Appendix D Specifications Appendix G Contact InformationChapter IntroductionChapter Product Overview Product OverviewFront Panel Back PanelSLM248G4S Chapter Installation InstallationPre-Installation Considerations Placement OptionsRack-Mount Placement Hardware InstallationDesktop Placement Uplinking the Switch Configuring Stacking ModeConnect port G1 on Unit 3 to port G2 on Unit Replacing a Stacked SwitchConnect port G1 on Unit 2 to port G2 on Unit Chapter Configuration Using Console Interface Using the HyperTerminal ApplicationUsing telnet Login screen appears. Proceed to the Login section belowHow to Use the Console Interface LoginSwitch Main Menu System Configuration MenuSystem Information Management SettingsUser & Password Settings Security Settings IP ConfigurationNetwork Configuration File ManagementStack Configuration Restore System Default SettingsReboot System Port Configuration System ModePort Status HelpChapter Configuration Using Web-based Utility SetupSetup Summary Device InformationSetup Zoom Setup Network SettingsDefault Gateway The IP address default 0.0.0.0 DNS Server The IP address of your ISP’s server thatSetup Time IdentificationLocal Time Daylight SavingSetup Stack Management Port Management Port SettingsPort Management Sntp ServersPort Configuration LAG Configuration Port Management Link AggregationLacp screen contains fields for configuring Lacp LAGs Port Management LacpGlobal Parameter Port PriorityVlan Management Port Settings Vlan ManagementVlan Management Create Vlan Lacp Port TableJoin Vlan to Port Vlan Management Port to VlanVlan Management Vlan to Port Statistics Statistics Rmon StatisticsStatistics Rmon History Rmon HistoryLog Table Rmon History TableStatistics Rmon Alarms Add AlarmStatistics Interface Statistics Statistics Port UtilizationStatistics Rmon Events Security 802.1x Settings SecurityInterface Ethernet-likeSetting Timer Security Port SecuritySecurity Management Access List Web IP FilteringBroadcast Only Counts only Broadcast traffic Security Storm ControlSecurity Radius QoS CoS Settings CoS SettingsCoS Default CoS Settings screen is used to enable or disable CoSQoS Bandwidth QoS Queue SettingsQoS Dscp Settings Spanning Tree STP Status QoS Basic ModeSpanning Tree Spanning Tree STP Port Settings Global SettingBridge Settings Spanning Tree Global STPVlan Igmp Settings MulticastMulticast Igmp Snooping Igmp GlobalMulticast Bridge Multicast Multicast Bridge Multicast Forward AllSnmp Global Parameters Snmp ViewsUser Name Provides a user-defined local user list Snmp Group ProfileSnmp Group Membership Snmp Communities Snmp Notification Filter Snmp Notification RecipientBase Table Advanced TableAdmin Admin User AuthenticationUser Authentication Local User EditAdmin Static Address Admin Dynamic AddressSecure The entry is defined for locked ports Clear Table If selected, this clears the MAC Address tableQuery Admin Port MirroringAdmin Cable Test Admin Save Configuration Admin Factory Default Admin Firmware UpgradeAdmin Reboot Admin Memory Logs Admin LoggingAdmin Server Logs Admin Flash Logs LogoutAppendix a Appendix a About Gigabit Ethernet Fiber Optic CablingGigabit Ethernet Fiber Optic CablingAppendix B About Switch Stacking About Switch StackingAppendix B Stack Building Quick StartAdvanced Stacking Stack ResiliencyUnit IDs Unit ID AllocationMaster Election Stack Units Startup ProcessMaster Discovery Unit and Port Configuration User ControlsStacking Examples Replacing a Failed Stack Member in a Running StackStack Master Failure and Replacement Subgroup Contains Both Master Unit and Backup Master Unit Splitting a StackMerging Two Stacks Both Stacks Kept Running During InsertionStacking Cable Failure Inserting Too Many UnitsGlossary Appendix CAppendix C Glossary Glossary Packet a unit of data sent over a network Mail protocol on the InternetAppendix C Appendix D Appendix D SpecificationsSpecifications Dimensions HOL Blocking Head of line blocking preventionSupports up to 9K byte frames 802.3 10BASE-T EthernetWarranty Information Limited WarrantyObtaining Warranty Service Appendix EWarranty Information Technical SupportAppendix F Regulatory InformationRegulatory Information Appendix F Norsk Norwegian Miljøinformasjon for kunder i EU Appendix F Appendix G Contact Information

SLM224G4S specifications

The Linksys SLM224G4S is a sophisticated Layer 2 managed switch designed for businesses and institutions that demand high performance, reliability, and advanced networking features. This model stands out due to its blend of robustness and manageability, making it ideal for expanding networks.

One of the primary features of the SLM224G4S is its 24 Gigabit Ethernet ports, allowing for high-speed data transfers essential for bandwidth-intensive applications. Supporting auto-negotiation, these ports can detect the capabilities of connected devices and configure themselves accordingly, ensuring optimal performance without manual intervention. With four additional shared Gigabit SFP (Small Form-factor Pluggable) ports, this switch provides flexibility in network design and enhances scalability.

The SLM224G4S supports VLAN (Virtual Local Area Network) capabilities, which can segment network traffic to improve security and performance. This is particularly useful in environments where different departments or teams require distinct network segments for operational efficiency. By implementing VLANs, organizations can enhance their network management while isolating sensitive information from potential threats.

Quality of Service (QoS) is another critical technology integrated into the SLM224G4S. It prioritizes network traffic, ensuring that critical applications receive the bandwidth they need for optimal performance. This is particularly important for VoIP and video conferencing applications, where latency and jitter can significantly impact user experience.

The switch also features advanced Layer 2 management functionalities, including SNMP (Simple Network Management Protocol), allowing IT administrators to monitor network performance and quickly troubleshoot issues. The embedded web-based management interface makes configuration straightforward, enabling quick adjustments to settings without deep networking knowledge.

Security is a paramount consideration in today’s networking landscape. The SLM224G4S provides robust security features, including port security that limits the number of MAC addresses allowed on a port, reducing the risk of unauthorized access. Moreover, it supports802.1X port-based authentication, ensuring that only authenticated devices can connect to the network.

In summary, the Linksys SLM224G4S managed switch boasts features such as 24 Gigabit Ethernet ports, VLAN support, QoS, SNMP management, and advanced security protocols. These characteristics make it an excellent choice for businesses looking to enhance their network's performance, safety, and reliability, paving the way for seamless connectivity in today’s digital age.
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