Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1184

Complete Software Guide for Junos
Related
Documentation
Understanding Virtual Chassis Port Link Aggregation in an EX8200 Virtual Chassis
Related
Documentation
1080
®
OS for EX Series Ethernet Switches, Release 10.4
Figure 27: EX8200 Virtual Chassis Ports
Master External
Routing Engine
User-configured
VCP Link
EX8200
Member switch
Automatic VCP links
EX8200 Virtual Chassis Overview on page 1071
Setting a 10-GigabitEthernet Port as a Virtual Chassis Port in an EX8200 Virtual Chassis
(CLI Procedure) on page 1097
In an EX8200 Virtual Chassis, physical 10–GigabitEthernet ports that are configured as
Virtual Chassis port (VCP) links that connect member switches together automatically
form a logical point-to-point link, known as a link aggregation group (LAG) or bundle. A
LAG provides more bandwidth than a single Ethernet link can provide. Additionally, link
aggregation provides network redundancy by load-balancing traffic across all available
links. If one link fails, the system automatically load-balances traffic across all remaining
links.
VCP links between member switches in the Virtual Chassis are automatically connected
into a single LAG; no user configuration is required to configure the LAG. You can configure
up to 12 Ethernet ports as VCPs to form a LAG between member switches in the Virtual
Chassis.
LAGs are also useful for connecting the network ports of directly-connected devices into
an EX8200 Virtual Chassis. See "Understanding Link Aggregation into an EX8200 Virtual
Chassis" on page 1081.
EX8200 Virtual Chassis Overview on page 1071
Backup External
Routing Engine
EX8200
Member switch
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