Nortel Networks 10BASE-T Manual Do Utilizador
Using the BayStack 410-24T 10BASE-T Switch
1-18
309985-C Rev 00
Configuration Parameters
Certain configuration parameters, including the system characteristics strings,
some VLAN parameters, IGMP configuration parameters, and the MultiLink
Trunk names are stored in flash memory. These parameters are updated every 10
minutes or whenever you issue the Save Current Settings command (also,
whenever you issue the Reset command).
some VLAN parameters, IGMP configuration parameters, and the MultiLink
Trunk names are stored in flash memory. These parameters are updated every 10
minutes or whenever you issue the Save Current Settings command (also,
whenever you issue the Reset command).
Autosensing and Autonegotiation
BayStack 410-24T switches are autosensing and autonegotiating devices. The
term autosense refers to a port’s ability to sense the speed of an attached device.
The term autonegotiation refers to a standardized protocol (IEEE 802.3u) that
exists between two IEEE 802.3u-capable devices.
term autosense refers to a port’s ability to sense the speed of an attached device.
The term autonegotiation refers to a standardized protocol (IEEE 802.3u) that
exists between two IEEE 802.3u-capable devices.
Because the BayStack 410-24T switch uses fixed 10BASE-T ports, the
autonegotiation feature does not negotiate the port speed when connecting to
another IEEE 802.3u-capable device. The BayStack 410-24T switch only
negotiates the best duplex mode.
autonegotiation feature does not negotiate the port speed when connecting to
another IEEE 802.3u-capable device. The BayStack 410-24T switch only
negotiates the best duplex mode.
When an optional 10/100 BASE-T MDA is installed, the autonegotiation feature
selects the best of both speed and duplex modes for that connection. The MDA
ports negotiate down from 100 Mb/s speed and full-duplex mode until a supported
speed and duplex mode is acknowledged by the attached device.
selects the best of both speed and duplex modes for that connection. The MDA
ports negotiate down from 100 Mb/s speed and full-duplex mode until a supported
speed and duplex mode is acknowledged by the attached device.
Autosensing is used when the attached device is not capable of autonegotiation or
is using a form of autonegotiation that is not compatible with the IEEE 802.3u
autonegotiation standard. In this case, because it is not possible to sense the
duplex mode of the attached device, the BayStack 410-24T switch reverts to
half-duplex mode.
is using a form of autonegotiation that is not compatible with the IEEE 802.3u
autonegotiation standard. In this case, because it is not possible to sense the
duplex mode of the attached device, the BayStack 410-24T switch reverts to
half-duplex mode.
For more information about autosensing and autonegotiation modes, see
” on
.
Note:
Do not power off the switch within ten minutes of changing any
configuration parameters, unless you first issue the Save Current Settings
command. Powering down the switch within 10 minutes of changing
configuration parameters (without resetting) can cause the changed
configuration parameters to be lost.
command. Powering down the switch within 10 minutes of changing
configuration parameters (without resetting) can cause the changed
configuration parameters to be lost.