Juniper EX4300-48P 데이터 시트
3
Figure 2: Using Virtual Chassis technology, up to 10 EX4300
switches can be interconnected to create a single logical device
spanning an entire building.
Figure 3: The EX4300 Ethernet switch with Virtual Chassis
technology delivers a high-performance, scalable, and highly
reliable solution for the data center.
Mesh Virtual Chassis Configurations for the Data Center
In data center top-of-rack deployments, a full mesh five-switch
Virtual Chassis configuration can be created where every switch
member is just one hop away from every other member, delivering
the lowest possible latency. A mesh spanning distances of up to
150 meters can be created using standard QSFP+ optics and DAC
cables on the 40GbE ports, while 10GbE ports can be used as
uplinks to connect to upstream aggregation or core devices.
Virtual Chassis configuration can be created where every switch
member is just one hop away from every other member, delivering
the lowest possible latency. A mesh spanning distances of up to
150 meters can be created using standard QSFP+ optics and DAC
cables on the 40GbE ports, while 10GbE ports can be used as
uplinks to connect to upstream aggregation or core devices.
Figure 4: EX4300 switches in a full mesh Virtual Chassis
configuration for the data center.
Features and Benefits
Chassis-Class Availability
The EX4300 line of Ethernet switches delivers the same HA
functionality and supports many of the same failover capabilities
as other Juniper chassis-based systems.
functionality and supports many of the same failover capabilities
as other Juniper chassis-based systems.
Each EX4300 switch is capable of functioning as a Routing
Engine. when two or more EX4300 switches are interconnected,
a single control plane is shared among all Virtual Chassis member
switches. when two EX4300 switches are interconnected, Junos
OS automatically initiates an election process to assign a master
(active) and backup (hot-standby) Routing Engine. An integrated
Layer 2 and Layer 3 GRES feature maintains uninterrupted access
to applications, services, and IP communications in the unlikely
event of a primary RE failure.
Engine. when two or more EX4300 switches are interconnected,
a single control plane is shared among all Virtual Chassis member
switches. when two EX4300 switches are interconnected, Junos
OS automatically initiates an election process to assign a master
(active) and backup (hot-standby) Routing Engine. An integrated
Layer 2 and Layer 3 GRES feature maintains uninterrupted access
to applications, services, and IP communications in the unlikely
event of a primary RE failure.
when more than two switches are interconnected in a Virtual
Chassis configuration, the remaining switch elements act as line
cards and are available to assume the backup RE position should
the designated master fail. Master, backup, and line card priority
status can be assigned to dictate the order of ascension; this N+1
RE redundancy, coupled with the GRES, assures a smooth transfer
of control plane functions following unexpected failures.
Chassis configuration, the remaining switch elements act as line
cards and are available to assume the backup RE position should
the designated master fail. Master, backup, and line card priority
status can be assigned to dictate the order of ascension; this N+1
RE redundancy, coupled with the GRES, assures a smooth transfer
of control plane functions following unexpected failures.
The EX4300 implements the same slot/module/port numbering
schema as other Juniper Networks chassis-based products when
numbering Virtual Chassis ports, providing true chassis-like
operations. By utilizing a consistent operating system and a single
configuration file, all switches in a Virtual Chassis configuration
are treated as a single device, simplifying overall system
maintenance and management.
schema as other Juniper Networks chassis-based products when
numbering Virtual Chassis ports, providing true chassis-like
operations. By utilizing a consistent operating system and a single
configuration file, all switches in a Virtual Chassis configuration
are treated as a single device, simplifying overall system
maintenance and management.
Individually, the EX4300 offers a number of HA features that are
typically associated with modular chassis-based switches. when
combined with the field-proven Junos OS and L2/L3 failover
capabilities, these features provide the EX4300 with true carrier-
class reliability.
typically associated with modular chassis-based switches. when
combined with the field-proven Junos OS and L2/L3 failover
capabilities, these features provide the EX4300 with true carrier-
class reliability.
Access/Layer
EX4300 Virtual Chassis
Collaped Core/
Aggregation Layer
Server
1GbE
10/40GbE
40GbE Virtual
Chassis Port
Full Mesh
Virtual Chassis
Collapsed Core/Aggregation
Access
10/40GbE
40GbE Virtual
Chassis Port
Closet 1
EX4300
Closet 2
EX4300
Access
Aggregation
EX4300
10GbE/40GbE
uplinks
10/40GbE
40GbE Virtual
Chassis Port