Cabletron Systems SmartSTACK ETHERNET ELS10-27 User Manual

Contents

Configuring Your SmartSTACK Ethernet ELS10-273-173. If one has not been assigned, public is the default name.4. Enter the new community name.5. LCM prompts you to verify the new community name by retypingit.6. Retype the new community name.3.13 CONFIGURING BROADCAST/MULTICAST STORMPROTECTIONThe SmartSTACK Ethernet ELS10-27 provides automatic protectionagainst broadcast/multicast storms. Broadcast storms are excessivebroadcasts to all ports, typically caused by a malfunctioning device. Theycan result in severe network performance problems, including causingthe network to crash.To protect against broadcast/multicast storms, you must define anacceptable rate for multicast traffic across a port. In many ways, thisfeature is similar to filtering.Each SmartSTACK Ethernet ELS10-27 port can be individuallyconfigured for automatic multicast storm protection. You define whatlevel of multicasts the SmartSTACK Ethernet ELS10-27 will recognize as amulticast storm by specifying the number of multicast packets that can bereceived within a given time period.For example, if you configure SmartSTACK Ethernet ELS10-27 to receiveonto Port 3 no more than 50,000 multicasts per 10 seconds, any multicastsdestined for Port 3 are discarded after the first 50,000 multicasts. After 10seconds have elapsed, another 50,000 multicasts to Port 3 will be allowed.This maintains an effective maximum rate of 50,000 multicast packets per10 seconds.3.14 MODIFYING MIB VARIABLESSpecific instructions for controlling SmartSTACK Ethernet ELS10-27operations, modifying parameters, and so on, depend on the NMS youare using. This manual provides instructions for using LCM commands.However, LCM commands do not exist for all configuration options. Youmay need to modify your configuration using an NMS.