Nortel 5510-24t 规格指南
Unit replacement feature
In the unlikely event that a switch fails in a
stack, the affected switch can easily be
replaced without disrupting the stack. Using
the unit replacement feature, the configura-
tion of the failed switch may be copied from
a server to the new switch. The switch can
then be put back in the stack and the stack is
rebuilt automatically without affecting normal
operation of the stack.
stack, the affected switch can easily be
replaced without disrupting the stack. Using
the unit replacement feature, the configura-
tion of the failed switch may be copied from
a server to the new switch. The switch can
then be put back in the stack and the stack is
rebuilt automatically without affecting normal
operation of the stack.
Up to 16 built-in GBIC ports
in a stack
in a stack
BayStack 5510 Switches have two built-in SFP
GBIC ports for dedicated uplink connectivity
to network core switches such as the Passport*
8600. This doubles the uplink bandwidth as
GBIC ports are not required for stacking
purposes. Using the proven Distributed
Multi-Link Trunking (DMLT) resiliency
feature, up to 16 GBIC ports are available for
pure uplink connectivity in a full stack—
among the highest in the market.
GBIC ports for dedicated uplink connectivity
to network core switches such as the Passport*
8600. This doubles the uplink bandwidth as
GBIC ports are not required for stacking
purposes. Using the proven Distributed
Multi-Link Trunking (DMLT) resiliency
feature, up to 16 GBIC ports are available for
pure uplink connectivity in a full stack—
among the highest in the market.
BayStack 5510 Switches have also been archi-
tected to support future technologies such as
10 Gigabit uplinks.
tected to support future technologies such as
10 Gigabit uplinks.
Plug-and-play stacking with
built-in stacking ports
built-in stacking ports
BayStack 5510 Switches have built-in stack-
ing 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.
ing 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.
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
80 Gbps
640 Gbps
Max. stacking
bandwidth for
the stack
80 Gbps
stacking bandwidth
per switch
40 G
bps
40 G
bps
Downstream traffic
Upstream traffic
40 Gbps
40 Gbps
40 Gbps
40 Gbps
40 Gbps
40 Gbps
40 Gbps
40 Gbps
40 Gbps
Figure 2. Innovative FAST stacking architecture—supporting up and downstream traffic
2
Highest-density Gigabit
desktop switching
desktop switching
The BayStack 5510-48T Switch features 48
10/100/1000BASE-T RJ-45 ports for
desktop switching and two built-in SFP
(Small Form factor Pluggable) GBIC ports
for uplink. Port 47 and Port 48 offer configu-
ration flexibility by allowing the network
administrator to configure each port as either
10/100/1000 or make use of the built-in SFP
GBIC. As many as eight BayStack 5510-48T
Switches can be stacked to achieve up to
384 10/100/1000 ports for highest-density
desktop switching.
10/100/1000BASE-T RJ-45 ports for
desktop switching and two built-in SFP
(Small Form factor Pluggable) GBIC ports
for uplink. Port 47 and Port 48 offer configu-
ration flexibility by allowing the network
administrator to configure each port as either
10/100/1000 or make use of the built-in SFP
GBIC. As many as eight BayStack 5510-48T
Switches can be stacked to achieve up to
384 10/100/1000 ports for highest-density
desktop switching.
The BayStack 5510-24T Switch offers
24 10/100/1000BASE-T RJ-45 ports for
desktop switching and two built-in GBIC ports
for uplink. Port 23 and Port 24 offer configu-
ration flexibility as either a 10/100/1000 or a
built-in SFP GBIC port. Both BayStack 5510-
24T and 5510-48T switches may be
combined in a single stack for maximum
flexibility.
24 10/100/1000BASE-T RJ-45 ports for
desktop switching and two built-in GBIC ports
for uplink. Port 23 and Port 24 offer configu-
ration flexibility as either a 10/100/1000 or a
built-in SFP GBIC port. Both BayStack 5510-
24T and 5510-48T switches may be
combined in a single stack for maximum
flexibility.
Innovative FAST
stacking design
stacking design
Nortel Networks innovative FAST (Flexible
Advanced Stacking Technology) stacking
design of the BayStack 5510 allows for simul-
taneous bi-directional traffic flow on each
stacking port (Figure 2). In a full stack, this
design yields up to 640 Gbps—the highest
stacking bandwidth in the industry today.
Advanced Stacking Technology) stacking
design of the BayStack 5510 allows for simul-
taneous bi-directional traffic flow on each
stacking port (Figure 2). In a full stack, this
design yields up to 640 Gbps—the highest
stacking bandwidth in the industry today.
Switch fabric architecture
offering non-blocking
wire-speed performance
offering non-blocking
wire-speed performance
The BayStack 5510 Switches have a high-
performance Layer 3 switching fabric with a
maximum of 160 Gbps forwarding bandwidth
and wire-speed performance. The forwarding
rate for the BayStack 5510-48T is 71.4 Mpps
(million packets per second) and for the
BayStack 5510-24T is 35.7 Mpps
performance Layer 3 switching fabric with a
maximum of 160 Gbps forwarding bandwidth
and wire-speed performance. The forwarding
rate for the BayStack 5510-48T is 71.4 Mpps
(million packets per second) and for the
BayStack 5510-24T is 35.7 Mpps
Layer 3 routing
†
The BayStack 5510 Switch architecture
supports wire-speed Layer 3 IP routing across
the stack with static and local route support.
Software feature enhancements are planned
to include support for routing protocols such
as Routing Information Protocol (RIP v1/v2)
supports wire-speed Layer 3 IP routing across
the stack with static and local route support.
Software feature enhancements are planned
to include support for routing protocols such
as Routing Information Protocol (RIP v1/v2)
†
and Open Shortest Path First (OSPF)
†
.
Compact form factor
The BayStack 5510 Switches are offered in a
compact one-rack unit high design. An eight
unit stack provides up to 384 10/100/1000
ports. This allows for significant space and
cost savings in the wiring closet.
compact one-rack unit high design. An eight
unit stack provides up to 384 10/100/1000
ports. This allows for significant space and
cost savings in the wiring closet.
Auto stack configuration
The stack operation of the BayStack 5510
Switches allows for easy addition and dele-
tion of units to the stack without service
interruption. This increases the efficiency of
deployment and configuration.
Switches allows for easy addition and dele-
tion of units to the stack without service
interruption. This increases the efficiency of
deployment and configuration.
Nortel Networks unique FAST stacking
design supports an optimal data flow
across the stack using a shortest path
algorithm.
design supports an optimal data flow
across the stack using a shortest path
algorithm.
Most vendors today employ a traditional
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.
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 Networks 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.
the shortest past algorithm, which means
that the packet would traverse directly
from unit 3 to unit 2 in a single hop.
As shown here, a unit
can simultaneously
have traffic flow to
each adjacent unit at
40 Gbps full duplex.
can simultaneously
have traffic flow to
each adjacent unit at
40 Gbps full duplex.