Cabletron Systems SmartSTACK 100 - Manual (Page 65)

Configuring Your ELS100-16TX
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5. LCM prompts you to verify the new community name by
retyping it.
6. Retype the new community name.
3.13 CONFIGURING BROADCAST/MULTICAST STORM
PROTECTION
The ELS100-16TX provides automatic protection against
broadcast/multicast storms. Multicast storms are excessive
broadcasts to all ports, typically caused by a malfunctioning
device. They can result in severe network performance problems,
including causing the network to crash.
To protect against broadcast/multicast storms, you must define an
acceptable rate for multicast traffic across a port. In many ways,
this feature is similar to filtering.
Each ELS100-16TX port can be individually configured for
automatic multicast storm protection. You define what level of
multicasts the ELS100-16TX will recognize as a multicast storm by
specifying the number of multicast packets that can be transmitted
within a given time period.
For example, if you configure ELS100-16TX to transmit onto Port 3
no more than five multicasts per 60 seconds, any multicasts
destined for Port 3 are discarded after the first five multicasts.
After 60 seconds have elapsed, another five multicasts to Port 3
will be allowed. This maintains an effective maximum rate of five
multicast packets per minute.
Note: LCM does not allow you to configure for multicast storm
protection. You must use an SNMP-based NMS. See the
documentation that came with your NMS for configuration
instructions.