Nortel 450-12f 规格指南
BayStack 410 and 450 Switches Data Sheet
3
Figure 2: High-density 10/100/1000 switching in the wiring closet,
featuring fail-safe stackability and MultiLink Trunking
for redundant connections to local servers and the
network center.
for redundant connections to local servers and the
network center.
BayStack
410 & 450 Switches
410 & 450 Switches
MultiLink Trunking
across stack for
multi-Gigabit,
load-balancing
connectivity to
local servers and
the network center.
across stack for
multi-Gigabit,
load-balancing
connectivity to
local servers and
the network center.
Accelar™
1200 Switch
1200 Switch
1 Gbps
100 Mbps
10 Mbps
100 Mbps
100 Mbps
and redundancy. Should one port
connection fail, other connections
within the MultiLink Trunk assume the
full traffic load seamlessly. MultiLink
Trunking also allows servers and critical
resources to be connected to different
switches in the stack to achieve
“Multi-Homing,” whereby link
redundancy is extended to include
unit redundancy, resulting in highly
available critical resources (see Figure 2).
connection fail, other connections
within the MultiLink Trunk assume the
full traffic load seamlessly. MultiLink
Trunking also allows servers and critical
resources to be connected to different
switches in the stack to achieve
“Multi-Homing,” whereby link
redundancy is extended to include
unit redundancy, resulting in highly
available critical resources (see Figure 2).
• Each switch includes a Redundant
Power Supply Unit connection.
Should the switch’s built-in power
supply fail, the Nortel Networks RPSU
(sold separately) will automatically
supply power to the switch for
uninterrupted operation.
Should the switch’s built-in power
supply fail, the Nortel Networks RPSU
(sold separately) will automatically
supply power to the switch for
uninterrupted operation.
MultiLink Trunking
Enables grouping of links between the
switch and another switch or a server to
provide higher bandwidth of up to 800
Mbps (when used with 10/100 ports or
100BASE-FX ports) or up to 8 Gigabits
switch and another switch or a server to
provide higher bandwidth of up to 800
Mbps (when used with 10/100 ports or
100BASE-FX ports) or up to 8 Gigabits
per second (when used with Gigabit
uplink ports on BayStack 450 Switches)
with active redundant links. Trunked
ports can span multiple units of the
stack for fail-safe connectivity to mission-
critical servers and the network center.
uplink ports on BayStack 450 Switches)
with active redundant links. Trunked
ports can span multiple units of the
stack for fail-safe connectivity to mission-
critical servers and the network center.
IGMP Snooping
The BayStack 410 and 450 Switches
feature a new level of efficient IP
MultiCast support by examining
(‘snooping’) all IGMP traffic in hardware
at line rate, and pruning unwanted data
streams from affecting network or
endstation performance.
feature a new level of efficient IP
MultiCast support by examining
(‘snooping’) all IGMP traffic in hardware
at line rate, and pruning unwanted data
streams from affecting network or
endstation performance.
Enterprise-sized
MAC Address Table
MAC Address Table
BayStack 410 and 450 Switches support
more than 16,000 MAC addresses per
switch for deployment of large-scale
enterprise networks with many attached
devices and workgroups connected to
each switch. (In a full 802.1Q environment,
32,000 MAC addresses are supported.)
more than 16,000 MAC addresses per
switch for deployment of large-scale
enterprise networks with many attached
devices and workgroups connected to
each switch. (In a full 802.1Q environment,
32,000 MAC addresses are supported.)
Advanced VLAN Support
Up to 64 port-based or protocol-based
VLANs can be established for each
switch, to extend the broadcast domain
and segment network traffic.
VLANs can be established for each
switch, to extend the broadcast domain
and segment network traffic.
Protocol-based VLANs allow switch ports
to be assigned to a broadcast domain,
based on the protocol information within
the packet. These VLANs can localize
broadcast traffic and assure that the
specified protocol type packets are sent
only to the protocol-based VLAN ports.
to be assigned to a broadcast domain,
based on the protocol information within
the packet. These VLANs can localize
broadcast traffic and assure that the
specified protocol type packets are sent
only to the protocol-based VLAN ports.
802.1Q VLAN Trunking
VLAN trunking is supported on every
port of the switch, allowing efficient
means of transporting broadcast domains
across switches.
port of the switch, allowing efficient
means of transporting broadcast domains
across switches.
802.1p Priority Queuing
Standards-based priority queuing
enables prioritization of multimedia or
latency-sensitive traffic, making possible
integration of voice, video, and data
within the same network.
enables prioritization of multimedia or
latency-sensitive traffic, making possible
integration of voice, video, and data
within the same network.
Fail-Safe Design Features
• Redundant cascade stacking architecture.
• Each unit in the stack has a full copy of
the stack configuration so in the unlikely
event of any unit failure, operation of
the stack continues without affecting
application connectivity.
event of any unit failure, operation of
the stack continues without affecting
application connectivity.
• Gigabit uplinks (for BayStack 450
Switches only) feature LinkSafe, which
provides two different physical fiber
connectors for each Gigabit uplink.
Upon primary path failure, the traffic
is diverted to the redundant path
in microseconds, protecting critical
Gigabit Ethernet connections to
servers or the network center.
provides two different physical fiber
connectors for each Gigabit uplink.
Upon primary path failure, the traffic
is diverted to the redundant path
in microseconds, protecting critical
Gigabit Ethernet connections to
servers or the network center.
• MultiLink Trunking can be implemented
across the stack, where connections
between individual devices (for example,
between a BayStack 450 Switch and an
Accelar 1200 Routing Switch) can be
aggregated for both higher bandwidth
between individual devices (for example,
between a BayStack 450 Switch and an
Accelar 1200 Routing Switch) can be
aggregated for both higher bandwidth