Owners Manual

Management Access on S-Series Stacks
You can access the stack via the console port or VTY line.
• Console access — You may access the stack through the console port of the master unit (stack
manager) only. Similar to a standby RPM, the console port of the standby unit does not provide
management capability; only a limited number of commands are available. Member units provide a
limited set of commands.
• Remote access — You may access the master unit and standby unit in a stack through the dedicated
management Ethernet interfaces with SNMP, SSH, or via Telnet.
Example of Accessing Non-Master Units on a Stack via the Console Port
-------------------CONSOLE ACCESS ON THE STANDBY----------------
2-unit-stack(standby)#?
cd Change current directory
clear Reset functions
copy Copy from one file to another
delete Delete a file
dir List files on a filesystem
disable Turn off privileged commands
enable Turn on privileged commands
exit Exit from the EXEC
format Format a filesystem
package automation package related commands
pwd Display current working directory
rename Rename a file
reset Reset selected card
show Show running system information
ssh-peer-stack-unit Open a SSH connection to the peer Stack-unit
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
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