3Com MSH 1005, User Manual

Page: 69 / 155

DUA1840-0AAA01
3-8 C
H A P T E R
3: S
W I T C H
C
O N F I G U R A T I O N
Lost Links The number of times the link has been lost since the Switch
1005 was last reset. If this field displays a number other than 0, you
should check your cables and replace any that may be damaged.
If the port is directly connected to an end-station, this counter
increments each time the end-station goes through a power off/on
cycle and is not a result of faulty cabling.
Intelligent Flow Management (IFM) Enable/Disable This option
allows you to enable or disable IFM. IFM minimizes packet loss which
can occur with conventional switches.
Intelligent Flow Management (IFM) should be disabled if the port is
connected to a repeated segment where the traffic is local to that
segment.
Security Enable/Disable When Security is enabled, the port enters a
single address learning mode. The Switch 1005 removes all addresses
currently stored against the port in the Switch Database. The Switch
1005 then learns the source address from the first packet it receives on
the port since security was enabled. The port then enters a secure
mode. Once security is enabled, no other station with a different
address is permitted to access the network through the secure port. If a
station with a different address attempts to transmit packets through
onto the network through the port, the port is automatically disabled
and a trap is generated. The port remains disabled until it is enabled
using this screen or an SNMP Network Manager.
Security is not available on backbone ports. If the port has been defined
as a backbone port, the Security field will not be displayed.