Nortel 5520-48t-pwr 规格指南

ERS 5600 Switches can be Stacked 
with one another or with any Ethernet 
Routing Switch 5500 unit, and when 
connected to an adjacent ERS 5500, the 
ERS 5600 automatically adjusts to the 
ERS 5500’s Stack bandwidth of 80Gbps. 
This enhanced flexibility provides the 
opportunity to mix and match port 
configurations based on operations needs, 
while preserving any existing ERS 5500 
investments.

ERS 5000 models come with two 
in-built auto-sensing Stacking connec-
tions — implementing sophisticated 
Queuing — for simple, cost-effective 
and efficient Stacking. This design frees 
uplink ports for dedicated connectivity 
to the backbone. The ERS 5000’s high-
performance architecture guarantees 
optimized throughput across Ports, 
Uplinks and Stacking connectors.

Ethernet Routing Switch 5000 is a flex-
ible solution that can be deployed in a 
variety of Enterprise environments. These 
include: 

With its non-blocking design, high-
density GbE and integrated 10GbE port 
options, the Ethernet Routing Switch 

5000 Series is perfectly suited as a Wiring 
Closet solution for high-availability LAN 
edge User connectivity. Up to eight ERS 
5000 Switches can be combined into a 
single Stack with each ERS 5600 unit 
providing two 10GbE XFP ports for 
high-capacity uplinks to the Core or 
aggregation layers of the network. ERS 
5698 models provide even greater cost, 
space and energy efficiency with their 
ultra-dense Gigabit-to-the-Desktop 
capacity and the added flexibility of up 
to 6 SFP ports per Switch for long-reach 
fiber optic connections. With the ability 
to support Power-over-Ethernet across 
all its ports, the ERS 5000 Series is an 
effective and flexible Wiring Closet/
Edge solution in support of Desktop and 
powered devices.

The high-performance, low-latency and 
high-availability requirements of the 
modern Data Center make the ERS 
5000 Series a perfect solution for Server 
access and consolidation. By utilizing 
the ERS 5000’s innovative ‘Horizontal 
Stacking’ capability — a Switch at the 
top of each Server rack, Stacked ‘hori-
zontally’ — the ERS 5000 Series can 
support cost-effective, high-density 
Server connections. Up to 400 Gigabit 
ports and multiple 10GbE uplinks per 
Stack can be deployed in this manner 
(see Figure 1). 

Figure 1.  Ethernet Routing Switch 5000 in Horizontal  

Stacking/Data Center application

Nortel has continued to evolve and 
perfect its Enterprise Stackable portfolio 
into a truly resilient, high-performance 
Stacking solution. Nortel’s Ethernet 
Routing Switch 2500, 4500, and 5500 
and 5600 product lines all incorporate 
key capabilities designed to deliver a 
‘Stackable Chassis’ solution, including: 

•  Ease of growth/management: 

Extending capacity is easy; simply cable 
a new unit into the Stack, and the Stack 
configuration is automatically updated. 
The Stack acts as a single entity that 
can be managed via a single IP Address.

•  Scalable performance: The high-

performance design of Nortel’s 
Stackable Switches along with their 
high-speed Stack connections (up to 
144Gbps per Switch/1.152Tbps per 
Stack) ensure that the Stack scales 
proportionally as each new unit is 
added. 

•  Optimal path forwarding: A bi-

directional, multi-path forwarding 
algorithm between Switches ensures 
that the shortest, most optimal path 
is chosen for each flow of traffic. This 
design offers a clear performance 
advantage over the basic logical Ring 
or Token approaches used by other 
vendors. 

•  No single point of failure: Stack 

operation is unaffected by the failure 
of any unit in the Stack. Each unit’s 
independent Switch Fabric along with 
distributed, redundant power ensures 
continuous operation of the Stack. 
Individual Stack units can easily be 
replaced — i.e., a ‘virtual hot-swap’ 
capability — without impacting Stack 
operations (a feature known as ‘Auto-
Unit Replacement’).

•  Switch Clustering: Switch Clustering 

(based on Nortel’s SMLT technology) 
can be enabled on the ERS 5000 Series 
to enhance overall resiliency of the 
Stack solution, providing load-balancing 
and sub-second failover.

DMLT to Core/Distribution

DMLT to Core/Distribution