Question: How to merge a Stack Controllers?
When two members are configured for pre-set and are merged.
Both units remain Active, but are not part of a single stack.
To form a single stack of two members, remove the stack-profile configuration or restore stacking default from the secondary
unit and add the serial number and role to the Primary unit.
In Case you are merging two stacks Stack A and Stack B and you want Stack A to take over the entire stack, it is always recommened to reset the other stack configuration. On Stack B execute "restore factory_default stacking" and then add the Serial number of these member to Stack A.
(ArubaS3500-48P) #show stacking members
Member status: Active, Stack Id: 000b866a5ac04f7a47c4 Stack uptime: 43 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 * Primary 000b.866a.5ac0 Preset Active ArubaS3500-48P AW0000155
(ArubaS3500-24T) #show stacking members
Member status: Active, Stack Id: 000b866a75004f7a47d8 Stack uptime: 45 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 * Primary 000b.866a.7500 Preset Active ArubaS3500-24T AU0000229
Both Members remain Active, but are seen as Dormant to each other and they are not part of a single stack as shown below:
(WINNER STACK) #show stacking members
Memberstatus: Active, Stack Id: 000b866a5ac04f7a47c4
Stack uptime: 3 minutes 47 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 * Primary 000b.866a.5ac0 Preset Active ArubaS3500-48P AW0000155
? Primary 000b.866a.7500 128 Dormant [C] ArubaS3500-24T AU0000229
[S] - Split [V] - Version Mismatch [D] - Depleted Slots [C] - Preset Configuration Mismatch
Add the serial number and assign role, to merge both the units to be part of a single stack as shown below:
(WINNER STACK) #configure terminal
Enter Configuration commands, one per line. End with CNTL/Z
(WINNER STACK) (config) #stack-profile (WIN) (stack-profile) #member-id 2 serial-number AU0000229 role primary-capable
WARNING!! This profile will not be applied till the configuration is saved.
(WINNER STACK) (stack-profile) #end (WIN) # (WIN) #write memory
Saving Configuration...... Configuration Saved.
(WINNER STACK) #show stacking members
Member status: Active, Stack Id: 000b866a5ac04f7a47c4
Stack uptime: 9 minutes 27 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 * Primary 000b.866a.5ac0 Preset Active ArubaS3500-48P AW0000155
2 Secondary 000b.866a.7500 Preset Active ArubaS3500-24T AU0000229
____________________________________________________________________________________________________________________________
2. In a two-member stack with split-detection enabled, both the members of the stack remain active.
(WINNER STACK) #show stacking members
Member status: Active, Stack Id: 000b866a5ac04f7a47c4 Stack uptime: 19 minutes 57 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 * Primary 000b.866a.5ac0 Preset Active ArubaS3500-48P AW0000155
2 Secondary 000b.866a.7500 Preset Active ArubaS3500-24T AU0000229
Disable split-detection
(WINNER STACK) #show stack-profile stack-profile "default"
Parameter Value
MAC persistence timeout 15 Minutes Split Detection Disabled
Preset-profile:
Member-id Serial-number Role
0 AW0000155 Primary-capable
2 AU0000229 Primary-capable
In the case the stack is down or the stack interfaces go down, both units will act as independent Primary
(WINNER STACK) #show stacking members
Member status: Active, Stack Id: 000b866a5ac04f7a47c4
Stack uptime: 22 minutes 13 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 * Primary 000b.866a.5ac0 Preset Active ArubaS3500-48P AW0000155
2 Unknown 000b.866a.7500 Preset Away ArubaS3500-24T AU0000229
O/p as shown on the member 2 console.
(WINNER STACK) #show stacking members
Member status: Active, Stack Id: 000b866a75004f7a4e44
Stack uptime: 22 minutes 29 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 Unknown 000b.866a.5ac0 Preset Away ArubaS3500-48P AW0000155
2 * Primary 000b.866a.7500 Preset Active ArubaS3500-24T AU0000229
Once the stack interface are back up the stack is re-formed as original stack
(WINNER STACK) #show stacking members
Member status: Active, Stack Id: 000b866a5ac04f7a47c4
Stack uptime: 26 minutes 6 seconds
Id Role MAC Address Priority State Model Serial
-- ---- ----------- -------- ----- ----- ------
0 * Primary 000b.866a.5ac0 Preset Active ArubaS3500-48P AW0000155
2 Secondary 000b.866a.7500 Preset Active ArubaS3500-24T AU0000229