Dell Powerconnect 8164f Manual
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Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F
41
Removal of a stack unit Figure 14.
Removal of a stack unit results in one or more freed cables. In this example, there is a freed quad-
breakout cable (red) that was used to link the bottom unit to the one directly above it. The second
quad-breakout cable is then used to connect the top and bottom units to again complete the ring
topology.
Note: A QSFP+ quad-breakout cable connects one QSFP+ 40GE port to four SFP+ 10GE ports.
Alternatively, once the unit is removed, the remaining quad-breakout cable could be replaced with a
QSFP+ cable to connect the top and bottom stack members. This would free up four SFP+ interfaces,
but would require the use of another QSFP+ interface. The interfaces used for stacking is based on the
administrator’s preference.
Validation
To validate the stack unit has been removed and that the remaining stack members are still intact,
type the show switch command.
console#show switch
Management Standby Preconfig Plugged-in Switch Code
SW Status Status Model ID Model ID Status Version
--- ---------- --------- ----------- ------------ ----------- ---------
1 Mgmt Sw PCT8132 PCT8132 OK 5.0.0.3
2 Stack Mbr Oper Stby PCT8164 PCT8164 OK 5.0.0.3
3 Stack Mbr PCT8164 PCT8164 OK 5.0.0.3
4 Stack Mbr PCT8132F PCT8132F OK 5.0.0.3
5 Unassigned PCT8132F Not Present 5.0.0.3
SWITCH REMOVED
FROM STACKACTLNK
2864
1753
18242220
17232119
10161412
9151311 2864
1753
10161412
9151311
18242220
17232119ACTLNK ACTLNK
2864
1753
18242220
17232119
10161412
9151311
12ACT
LNK
ACT
LNK
26323028
25312927
42484644
41474543
34403836
33393735 ACTLNK
2864
1753
18242220
17232119
10161412
9151311
12ACT
LNK
ACT
LNK
26323028
25312927
42484644
41474543
34403836
33393735 QSFP+ MODULEACT
LNK
ACT
LNK QSFP+ MODULEACT
LNK
ACT
LNK 2864
1753
10161412
9151311
18242220
17232119ACTLNK
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F
42
Removing units from the stack configuration
Once a unit has been physically removed, it may be desired to remove it from the configuration as
well, if there are no plans on restoring it later. For the above example Unit 5 wasremoved; however,
the show switch command continues to show the removed switch in the configuration.
Issuing a no member command in Stack Configuration mode deletes the removed switch from the
configured stack information.
console(config)#stack
console(config-stack)#no member 5
console(config-stack)#show switch
Management Standby Preconfig Plugged-in Switch Code
SW Status Status Model ID Model ID Status Version
--- ---------- --------- ----------- ------------ ----------- ---------
1 Mgmt Sw PCT8132 PCT8132 OK 5.0.0.3
2 Stack Mbr Oper Stby PCT8164 PCT8164 OK 5.0.0.3
3 Stack Mbr PCT8164 PCT8164 OK 5.0.0.3
4 Stack Mbr PCT8132F PCT8132F OK 5.0.0.3
Notice that Unit 5 is no longer present in the configuration. A backup of the configuration (copy
running-config startup-config) is required to make the change persist after a reload.
Renumbering stack units
It may be desired to renumber switches in the stack. While this feature may be used at any time, it is
most commonly used after a switch has been removed and the remaining unit numbers are no longer
consecutive. While inconsecutive numbers or numbers out of order do not impact traffic in any way,
keeping an order can help quickly identify individual units and ports.
A switch may be any number between 1 and 6 as long as it is not already taken by another switch. If it
is desired to renumber the switch units to show units 1-2-3, instead of 1-2-4, it will require a brief
reset of the stack and clear the configuration of the interfaces on the switch receiving the new
number. Type the command show switch to see the current order of the units before renumbering.
console#show switch
Management Standby Preconfig Plugged-in Switch Code
SW Status Status Model ID Model ID Status Version
--- ---------- --------- ---------- ----------- ---------- ----------
1 Stack Mbr Oper Stby PCT8164F PCT8164F OK 5.0.0.3
2 Mgmt Sw PCT8132F PCT8132F OK 5.0.0.3
4 Stack Mbr PCT8164F PCT8164F OK 5.0.0.3
Caution: Renumbering stack units may hinder management scripts and monitoring software
that collects data based on particular port traffic. Use renumbering with caution when
monitoring ports and be aware that scripts and monitoring parameters may need to be
modified.
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F
43
Type the switch renumber command to change the number of the switch.
console(config)#switch 4 renumber 3
The switch will be reset to perform unit renumbering
and the configuration of switch interfaces will be cleared.
Are you sure you want to renumber? (y/n)y
Allow a few minutes for the switch to renumber, then enter the following.
console#show switch
Management Standby Preconfig Plugged-in Switch Code
SW Status Status Model ID Model ID Status Version
--- ---------- --------- ---------- ----------- ---------- ----------
1 Stack Mbr Oper Stby PCT8164F PCT8164F OK 5.0.0.3
2 Mgmt Sw PCT8132F PCT8132F OK 5.0.0.3
3 Stack Mbr PCT8164F PCT8164F OK 5.0.0.3
4 Unassigned PCT8164F Not Present 0.0.0.0
The switch that was Unit #4 is now Unit #3. Unit #4 is no longer present. To remove it from the list,
perform the no member command in Stack Configuration Mode.
console(config)#stack
console(config-stack)#no member 4
console(config-stack)#show switch
Management Standby Preconfig Plugged-in Switch Code
SW Status Status Model ID Model ID Status Version
--- ---------- --------- ---------- ----------- ---------- ----------
1 Stack Mbr Oper Stby PCT8164F PCT8164F OK 5.0.0.3
2 Mgmt Sw PCT8132F PCT8132F OK 5.0.0.3
3 Stack Mbr PCT8164F PCT8164F OK 5.0.0.3
Configuring a removed unit to be stand-alone
After removing a unit from a stack, the unit converts back to its original configuration that it had prior
to adding it to the stack, retaining the IP address, VLAN, LAG, and other settings. This allows
immediate access to the stand-alone through the out-of-band port if previously configured.
Note: A duplicate address could occur on the network if another device was assigned the IP
address of the device while it was a stack member. If this occurs simply detach the device
from the network and change the IP address through the console port.
Meta-data will remains on the switch until cleared or changes are made to the stack settings, but will
not affect functions of the switch. For example, a stand-alone switch is assigned to be unit #1. Upon
joining the stack it was assigned to be unit #3. When it is removed from the stack it will retain the
assignment of unit #3 until changed by the administrator. For instructions on how to make this change,
see Renumbering stack on page 42.
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F 44 Web interface method Since any interface on the 8100 series switches can be used for stacking, make sure to verify exactly which ports are being used for stacking so they are un-cabled and re-routed last, after the normal traffic-passing cables have been re-routed. This information is found at System > Stack Management > Stack Port Summary. Note: Clicking the Configured Stack-mode column header brings all Stack ports to the top of the list. Look for interfaces shown to be in Stack mode. The logical stack unit number is represented in each interface name. The first number in the interface name is the logical stack unit. For example, interface Te2/0/21 is in logical unit number 2. A blinking LED light is generated on the back of each Dell PowerConnect 81xx to locate each physical unit. This blinking LED is useful when identifying physical units and ports for running diags, sniffing, mirroring ports, and other basic troubleshooting. It is also helpful when needing to add, remove, replace or trace cables associated with these interfaces. Use the locate switch CLI command to blink the blue “Locator” LED on the switch unit you are trying to locate. console#locate switch 2 The LED locator light on switch 2 blinks for 20 seconds. The length of time the LED continues to blink can be changed using the locate time command, where ssss is the time in seconds for the LED to blink. Removing the physical switch unit from the stack Before removing a physical unit from a stack, prepare the ports on the other stack member units to receive the cables and traffic that will be redirected to them from the member unit being removed.
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F
45
Consider all LAGs, VLANs, STP, ACLs, security, and so on, that needs to be configured on the new ports
in order to accept cables, establish links, and begin to forward traffic.
Note: It is highly recommended not to continue until these things have been considered and
proper preparations are made.
Note: Do not remove or re-route stacking cables until prompted in the last step below.
Do not remove or re-route stacking cables until prompted. Disconnect all other links on the member to
be removed and re-route the traffic that was going through this unit so it now goes through the ports
that were prepared on the remaining stack unit members.
Caution: In the next step, be sure to keep track of all ports being used for stacking that will
be temporarily unplugged. They need to be re-cabled in the following step.
Only after re-routing the traffic through the remaining stack units, remove the stacking cables from the
switch to be removed. The switch being removed does not need to be powered off. Keeping the
switches powered on automatically brings it to a stand-along state as the stack cables are removed. In
the example below, the red quad-breakout cable will be removed along with the switch.
Cabling of five stacked units. Figure 15.
Use the freed cables or new cables to connect the two switches together that were previously adjacent
to the switch being removed. Since there are multiple interface and cable types supported for
stacking, a different set of cables may be required to make this connection.
SWITCH TO BE REMOVED
FROM STACKACTLNK
2864
1753
18242220
17232119
10161412
9151311 2864
1753
10161412
9151311
18242220
17232119ACTLNK ACTLNK
2864
1753
18242220
17232119
10161412
9151311
12ACT
LNK
ACT
LNK
26323028
25312927
42484644
41474543
34403836
33393735 ACTLNK
2864
1753
18242220
17232119
10161412
9151311
12ACT
LNK
ACT
LNK
26323028
25312927
42484644
41474543
34403836
33393735 QSFP+ MODULEACT
LNK
ACT
LNK QSFP+ MODULEACT
LNK
ACT
LNK 2864
1753
10161412
9151311
18242220
17232119ACTLNK
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F 46 Removal of a stack unit Figure 16. Removal of a stack unit results in one or more freed cables. In this example, there is a freed quad- breakout cable (red) that was used to link the bottom unit to the one directly above it. The second quad-breakout cable is then used to connect the top and bottom units to again complete the ring topology. Note: A QSFP+ quad-breakout cable is one that allows the user to connect one QSFP+ 40GE port to four SFP+ 10GE ports. Alternatively, once the unit is removed, the remaining quad-breakout cable could be replaced with a QSFP+ cable to connect the top and bottom stack members. This would free up four SFP+ interfaces, but requires the use of another QSFP+ interface. The interfaces used for stacking is based on the user’s preference. Validation To validate the stack unit was removed and that the remaining stack members are still intact, go to System > Stack Management > Stack Summary. SWITCH REMOVED FROM STACKACTLNK 2864 1753 18242220 17232119 10161412 9151311 2864 1753 10161412 9151311 18242220 17232119ACTLNK ACTLNK 2864 1753 18242220 17232119 10161412 9151311 12ACT LNK ACT LNK 26323028 25312927 42484644 41474543 34403836 33393735 ACTLNK 2864 1753 18242220 17232119 10161412 9151311 12ACT LNK ACT LNK 26323028 25312927 42484644 41474543 34403836 33393735 QSFP+ MODULEACT LNK ACT LNK QSFP+ MODULEACT LNK ACT LNK 2864 1753 10161412 9151311 18242220 17232119ACTLNK
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F 47 Removing units from the stack configuration Once a unit has been physically removed, it may be desired to remove it from the configuration as well, if there are no plans on restoring it later. For the above example Unit 5 was removed; however, the Stack Summary screen continues to show the removed switch in the configuration. To remove the switch from the configuration, go to the System > Stack Management > Unit Configuration screen. Select the Switch ID of the switch to be removed, and then check the Remove Switch check box at the bottom of the bottom of the screen. Clicking Apply deletes the removed switch from the stack configuration on the running-configuration. Go back to the Stack Summary screen to verify the switch was removed. A backup of the configuration (copying the running-configuration to the startup-configuration) in System > File Management > Copy Files is required to make the change persist after a reload. Renumbering stack units It may be desired to renumber switches in the stack. While this feature may be used at any time, it is most commonly preferred after a switch has been removed and the remaining unit numbers are no longer consecutive. While inconsecutive numbers or numbers out of order do not impact traffic in any way, keeping an order can help quickly identify individual units and ports. A switch may be any number between 1 and 6 as long as it is not already taken by another switch. If it is desired to renumber the switch units to show units 1-2-3, instead of 1-2-4, it requires a brief reset of the stack and clear the configuration of the interfaces on the switch receiving the new number. View the System > Stack Management > Stack Summary to see the current numbering of each unit.
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F 48 Caution: Renumbering stack units may hinder management scripts and monitoring software that collect data based on particular port traffic. Use renumbering with caution when monitoring ports and be aware that scripts and monitoring parameters may need to be modified. In this example there are three stack members numbered 1, 3, and 4. It may be desired to move 3 to 2, and then 4 to 3. This can be by renumbering 3 to 2 first, then renumbering 4 to 3. It is also possible to simply move 4 to 2, which is shown in the example below. Go to System > Stack Management > Unit Configuration and select the Switch ID to change. Enter the new Switch ID into the Change Switch ID to field and click Apply.
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F 49 Click OK on the next screen. Allow a few minutes for the switch to renumber, then verify the new ID from the System > Stack Management > Stack Summary screen. The switch that was Unit #4 is now Unit #2 and Unit #4 is no longer present. To remove it from the list, select it on the System > Stack Management > Unit Configuration screen, and then select the Remove Switch check box at the bottom.
Stacking Dell PowerConnect Switches: 8132, 8132F, 8164, 8164F 50 Clicking Apply deletes the removed switch from the stack configuration on the running-configuration. Go back to the Stack Summary screen to verify the switch was removed. A backup of the configuration (copying the running-configuration to the startup-configuration) in System > File Management > Copy Files is required to make the change persist after a reload. Configuring a removed unit to be stand-alone After removing a unit from a stack, the unit converts back to its original configuration that it had prior to adding it to the stack, retaining the IP address, VLAN, LAG, and other settings, allowing the user to immediately access the stand-alone through the out-of-band port if previously configured. Note: A duplicate address could occur on the network if another device was assigned the IP address of the device while it was a stack member. If this occurs simply detach the device from the network and change the IP address through the console port. Meta-data remains on the switch until cleared or changes are made to the stack settings, but will not affect functions of the switch. For example, a stand-alone switch is assigned to be unit #1. Upon joining the stack it was assigned to be unit #3. When it is removed from the stack it will retain the assignment of unit #3 until changed by the administrator. For instructions on how to make this change, see Renumbering stack on page 42.