Remote Monitoring (Rmon); Broadcast Suppression; Port Redirect Function; Flow Control - Cabletron Systems DLE52-MA User Manual

1.6

REMOTE MONITORING (RMON)

The DLE02-MA and the DLE52-MA support all nine Ethernet RMON
groups. The Statistics, Alarms, Events and History groups are enabled on
all ports by default.
RMON Actions, available from Cabletron Systems, is a vendor-specific
extension of RMON and provides the ability to set an "Action" on any
SNMP MIB variable. The Action can be triggered by setting an RMON
Event and/or Alarm. An example of an Action would be to turn off a
MIB-2 interface if a broadcast threshold is crossed.
1.7

BROADCAST SUPPRESSION

Broadcast Suppression enables a user to set a desired limit of receive
broadcast frames per port/per second to be forwarded out the other ports
on the module up to the set limit. Any broadcast frames above this
specified limit are dropped. In the event that broadcast frames are being
suppressed, multicast and unicast frames continue to be switched.
1.8

PORT REDIRECT FUNCTION

The Port Redirect function, also referred to as "Port Mirroring," is a
troubleshooting tool used to map traffic from a single source port to a
destination port within the chassis. This feature allows all packets,
including those with errors, to be copied and sent to an analyzer or
RMON probe. The analyzer or RMON probe will see the data as if it is
directly connected to the LAN segment of the source port.
1.9

FLOW CONTROL

Flow Control is a method of managing the flow of frames between two
devices. It ensures that a transmitting device does not overwhelm a
receiving device with data. This enables the receiving device to
communicate with the transmitting device, and to have it pause its
transmission while the receiving device processes the frames already
received. Flow control can be enabled or disabled on a port-by-port basis.
Both devices must support the IEEE 802.3x standard for flow control to
work.
DLE02-MA/DLE52-MA User's Guide
Remote Monitoring (RMON)
1-5