Nortel Ethernet Switch 425-24T + EU Power Cord AL2012B41-E5 用户手册
产品代码
AL2012B41-E5
3
speed. Each of the switched ports can
also automatically detect and support
full-duplex connections to servers, power-
user end stations or other switches, as
well as half-duplex connections to legacy
devices or hubs.
also automatically detect and support
full-duplex connections to servers, power-
user end stations or other switches, as
well as half-duplex connections to legacy
devices or hubs.
Custom Auto Negotiation
Advertisements (CANA)
CANA enables the network manager to
tune the autonegotiation capabilities of
any particular Ethernet port. The capa-
bilities include half-duplex and full-
duplex modes with speeds of 10, 100
and 1000 Mbps. This feature enables
the network manager to determine
which capabilities should be set as the
maximum supported on the network
and saves the network manager from
having to go to each workstation and
switch to configure a “fixed” speed. The
switch can then negotiate with the
connected device for the highest common
capabilities according to the parameters
defined by CANA for that port. This can
be particularly useful where the network
manager wished to limit the maximum
speed or duplex due to cabling limita-
tions or business requirements.
tune the autonegotiation capabilities of
any particular Ethernet port. The capa-
bilities include half-duplex and full-
duplex modes with speeds of 10, 100
and 1000 Mbps. This feature enables
the network manager to determine
which capabilities should be set as the
maximum supported on the network
and saves the network manager from
having to go to each workstation and
switch to configure a “fixed” speed. The
switch can then negotiate with the
connected device for the highest common
capabilities according to the parameters
defined by CANA for that port. This can
be particularly useful where the network
manager wished to limit the maximum
speed or duplex due to cabling limita-
tions or business requirements.
High-density stacking
architecture
The plug-and-play stacking architecture
of the Ethernet Switch 425 permits the
inter-connection of up to eight switches
with stacking cables into a single manage-
able entity of up to 384 10/100-Mbps
ports. Two built-in Gigabit stacking
ports in the rear of the switch provide
easy connections to other members of
the stack; there is no need to purchase a
cascade module or use an uplink port
for stacking.
of the Ethernet Switch 425 permits the
inter-connection of up to eight switches
with stacking cables into a single manage-
able entity of up to 384 10/100-Mbps
ports. Two built-in Gigabit stacking
ports in the rear of the switch provide
easy connections to other members of
the stack; there is no need to purchase a
cascade module or use an uplink port
for stacking.
This scalable stacking architecture of the
Ethernet Switch 425 protects the network
investment as business needs change or
grow. Enabling users to increase the port
density at the wiring closet as the busi-
Ethernet Switch 425 protects the network
investment as business needs change or
grow. Enabling users to increase the port
density at the wiring closet as the busi-
ness expands as well as providing high
availability through features such as
Nortel’s Distributed Multi-Link Trunking
(DMLT) are some of the key advantages
of Nortel’s stacking technology.
availability through features such as
Nortel’s Distributed Multi-Link Trunking
(DMLT) are some of the key advantages
of Nortel’s stacking technology.
The Ethernet Switch 425-24T and
Ethernet Switch 425-48T can be stacked
in combination as of version 3.6 software
to deliver added flexibility for customer
configurations. To further enhance the
flexibility of stacking, the Ethernet Switch
425-24T switch can be stacked using
version 3.1 or earlier software in any
combination up to a maximum of
eight units.
Ethernet Switch 425-48T can be stacked
in combination as of version 3.6 software
to deliver added flexibility for customer
configurations. To further enhance the
flexibility of stacking, the Ethernet Switch
425-24T switch can be stacked using
version 3.1 or earlier software in any
combination up to a maximum of
eight units.
High-speed uplink ports
The Ethernet Switch 425 switches offer
two built-in combo uplink ports (ports
25 and 26 on the Ethernet Switch
425-24T and ports 49 and 50 on the
Ethernet Switch 425-48T) in the front
of the unit that provide high-speed
connectivity to backbone switches or
servers. Each combo port consists of one
SFP GBIC (Small Form Factor Pluggable
Gigabit Interface Converter) port and
one 10/100/1000BASE-T port. Each
combo port autosenses between the SFP
GBIC and the 10/100/1000BASE-T
port and will enable either the SFP port
or the 10/100/1000BASE-T port
depending on the presence of a link. In
a stack of eight Ethernet Switch 425
products, up to eight uplink ports can
be used, delivering up to 16 Gbps of
uplink bandwidth.
two built-in combo uplink ports (ports
25 and 26 on the Ethernet Switch
425-24T and ports 49 and 50 on the
Ethernet Switch 425-48T) in the front
of the unit that provide high-speed
connectivity to backbone switches or
servers. Each combo port consists of one
SFP GBIC (Small Form Factor Pluggable
Gigabit Interface Converter) port and
one 10/100/1000BASE-T port. Each
combo port autosenses between the SFP
GBIC and the 10/100/1000BASE-T
port and will enable either the SFP port
or the 10/100/1000BASE-T port
depending on the presence of a link. In
a stack of eight Ethernet Switch 425
products, up to eight uplink ports can
be used, delivering up to 16 Gbps of
uplink bandwidth.
Layer 2 features
VLAN support
The Ethernet Switch 425 family of
products supports up to a maximum of
255 port-based VLANs which can be
established for each switch, to extend
the broadcast domain and segment
network traffic for higher network effi-
ciency. The 255 VLANs can be config-
ured on a standalone switch or across
the stack. IEEE 802.1Q VLAN Trunking
is supported on every port of the switch,
allowing efficient means of transporting
broadcast domains across switches.
Additionally, the Ethernet Switch 425
provides the ability to have both tagged
and untagged frames on the same port
for easy traffic segmentation with
minimal setup.
products supports up to a maximum of
255 port-based VLANs which can be
established for each switch, to extend
the broadcast domain and segment
network traffic for higher network effi-
ciency. The 255 VLANs can be config-
ured on a standalone switch or across
the stack. IEEE 802.1Q VLAN Trunking
is supported on every port of the switch,
allowing efficient means of transporting
broadcast domains across switches.
Additionally, the Ethernet Switch 425
provides the ability to have both tagged
and untagged frames on the same port
for easy traffic segmentation with
minimal setup.
Figure 4. The plug-and-play
architecture allows easy expansion
and management as a single unit
architecture allows easy expansion
and management as a single unit
Combo
Port 26
Combo
Port 25
Figure 5. Each combo port auto-senses between 1 SFP uplink port and
1 10/100/1000BASE-T port
1 10/100/1000BASE-T port