Nortel Ethernet Routing Switch 5530-24TFD AL1001A07-E5 用户手册

产品代码
AL1001A07-E5
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页码 12
3
Compact form factor
The Ethernet Routing Switch 5530 is
offered in a compact one-rack unit high
design that results in significant space
and cost savings in the wiring closet.
Innovative FAST stacking design
Nortel’s innovative FAST (Flexible
Advanced Stacking Technology)
stacking design of the Ethernet Routing
Switch 5000 Series allows for simulta-
neous bidirectional traffic flow on each
stacking port (Figure 2). In a full stack,
this design yields up to 640 Gbps
stacking bandwidth.
This design supports an optimal data
flow across the stack using a shortest
path algorithm.
Most vendors today employ a tradi-
tional ring architecture, meaning that 
a packet travels on the ring in only one
direction. For example, in a stack of
eight switches, if a packet needs to go
from unit 2 to unit 3, it can get there 
in a single hop. But if a packet needs to
go from unit 3 to unit 2, then it has to
traverse from 3 to 4, 4 to 5, 5 to 6, and
so on until it reaches unit 2. This
requires seven hops.
Nortel’s FAST stack design uses the
shortest past algorithm, which means
that the packet would traverse directly
from unit 3 to unit 2 in a single hop.
Plug-and-play stacking with 
built-in stacking ports
The Ethernet Routing Switch 5530 has
built-in stacking ports for faster, plug-
and-play stacking. This is more cost-
effective as cascade modules are not
required. This stacking design frees up
both of the uplink ports for dedicated
connectivity to the backbone or high-
speed servers. The Ethernet Routing
Switch 5530 is shipped with a cascade
cable (1.5 feet). In addition, cascade
cables are also available in different
lengths — 1.5 feet, 10 feet and 5
meters (16.4 feet) — to cover a variety
of stacking needs.
Recessed stacking connectors 
for higher reliability
The Ethernet Routing Switch 5530 
is designed with recessed stacking
connectors that save premium closet
space and protect the integrity of 
the stack from accidental contact
(Figure 3).
Ethernet Switch Software
The Ethernet Switch Software for 
the Ethernet Routing Switch 5000
Series is a single software image that
allows the 5510, 5520 and Ethernet
Routing Switch 5530s to stack together.
The Ethernet Switch Software simplifies
network operations by reducing the
number of steps required for switch
software updates. Only a single image
needs to be downloaded from the 
Nortel support site for all Ethernet 
Routing Switch 5000 types. The image
needs to be loaded only to the base unit
of the stack which automatically loads
it to other switches in the stack.
Ethernet Switch Software features
Newly released software is download-
able from the Web and supports the
following new major features:
• Auto Unit Replacement
• New Unit Quick Configuration
• IP Flow Information Export (IPFIX)
• Multiple Spanning Tree Protocol
(MSTP) over MLT
• Domain Naming Services (DNS)
• Per Port BaySecure
• Dual Configuration
• Many to 1 Port Mirroring
• IP Directed Broadcast
• Port-based Quality of Service 
Policy Support
• Security Wizard
Downstream traffic
Upstream traffic
640 Gbps
Max stacking 
bandwidth for 
the stack
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
40 Gbp
s
40 Gbp
s
40 Gbp
s
40 Gbp
s
40 Gbp
s
40 Gbp
s
40 Gbp
s
40 Gbp
s
40 Gbp
s
40 
Gbp
s
40 Gbp
s
80 Gbps
stacking bandwidth  
per switch
Figure 2. Innovative FAST stacking architecture
As shown here, a unit can 
simultaneously have traffic 
flow to each adjacent unit 
at 40 Gbps full duplex.
Figure 3. Plug-and-play stacking 
with recessed stack connectors
Recessed connectors