Reference Guide

start Start shell
telnet-peer-stack-unit Open a telnet connection to the peer Stack-unit
terminal Set terminal line parameters
upload Upload file
-----------------CONSOLE ACCESS ON A MEMBER----------------------------
Stack(stack-member-0)#?
reset-self Reset this unit alone
show Show running system information
You can connect two units with two or more stacking cables in case of a stacking port or cable failure. Removal of only
one of the cables does not trigger a reset.
Important Points to Remember—S4820T Stacking
• You may stack up to six S4820T systems.
• The S4820T cannot be stacked with other system types.
• You cannot enable stacking and virtual link trunking (VLT) simultaneously on the S4820T. To convert a stacked
unit to VLT, refer to Reconfiguring Stacked Switches as VLT.
• Data ports are configured as stacking ports in predefined groups of four 10G ports called stack-groups. When
using the 40G ports, you can configure a single port as a stack port; each 40G port is a stack-group.
• All the ports in a stack-group are placed in stacking mode. Unused ports in that group cannot be used as data
ports.
• The stack-group must contain only ports of the same type (all 10G or all 40G).
– Stacking with 1G interfaces is not supported.
• Stacking on the S4820T is accomplished through front-end user ports on the chassis.
• All stack units must have the same version of FTOS.
S-Series Stacking Installation Tasks
The following are the S-Series stacking installation tasks.
• Create an S-Series Stack
• Add Units to an Existing S-Series Stack
• Remove Units or Front End Ports from a Stack
• Split an S-Series Stack
Create an S-Series Stack
Stacking is enabled on the S4820T using the front end ports.
No configuration is allowed on front end ports used for stacking. Stacking can be made between 10G ports of two units
or 40G ports of two units. The stack links between the two units are grouped into a single LAG.
Stack Group/Port Numbers
By default, each unit in Standalone mode is numbered stack-unit 0.
A maximum of eight 10G stack links or two 40G stack links can be made between two units in a stack. The front end ports
are divided into 16 stack groups, each with 40G of bandwidth. Stack groups 0 through 11 correspond to 10G stack groups
with four ports each. Stack groups 12 to 15 are one 40G port each.
The front end ports accommodate SFP, SFP+ and QSFP+.
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