Amer Networks SS3GR24i - Manual (Page 25)

SS3GR24i/SS3GR48i Layer3 Stackable Gigabit Switch User’s Guide
Forwarding state to the Blocking state. The trap is not sent
if a new root trap is sent for the same transition.
• Link Change Event – This trap is sent whenever the link
status of a port changes from link up to link down or from
link down to link up.
• Port Partition – This trap is sent whenever the port state
enters the partition mode (or automatic partitioning, port
disable) when more than thirty-two collisions occur while
transmitting at 10Mbps or more than sixty-four collisions
occur while transmitting at 100Mbps.
• Broadcast\Multicast Storm – This trap is sent whenever the
port reaches the threshold (in packets per second) set
globally for the switch. Counters are maintained for each
port, and separate counters are maintained for broadcast
and multicast packets. The switch’s default setting is 128
kpps for both broadcast and multicast packets.
MIBs
Management and counter information are stored in the switch in
the Management Information Base (MIB). The switch uses the
standard MIB-II Management Information Base module.
Consequently, values for MIB objects can be retrieved from any
SNMP-based network management software. In addition to the
standard MIB-II, the switch also supports its own proprietary
enterprise MIB as an extended Management Information Base.
These MIBs may also be retrieved by specifying the MIB’s Object-
Identity (OID) at the network manager. MIB values can be either
read-only or read-write.
Read-only MIBs variables can be either constants that are
programmed into the switch, or variables that change while the
switch is in operation. Examples of read-only constants are the
number of port and type of ports. Examples of read-only variables
are the statistics counters such as the number of errors that have
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