After checking whether a stack has been established based on indicators, you can log in to the stack and run commands to check whether the stack topology is the same as the hardware connections or to locate and rectify faults.
Log in to the stack. For details, see Stack Login.
Check whether the stack has been established successfully.
<HUAWEI> display device S5720-32X-EI-AC's Device status: Slot Sub Type Online Power Register Status Role ------------------------------------------------------------------------------- 0 - S5720-32X-EI Present PowerOn Registered Normal Master 1 - S5720-32X-EI Present PowerOn Registered Normal Standby
Check whether the stack topology is the same as the actual hardware connections.
<HUAWEI> display stack Stack mode: Service-port Stack topology type: Link Stack system MAC: 0200-0000-01ab MAC switch delay time: 10 min Stack reserved vlan: 4093 Slot of the active management port: 0 Slot Role Mac address Priority Device type ------------------------------------------------------------- 0 Master 0200-0000-01ab 255 S5720-32X-EI-AC 1 Standby 0200-0000-0000 200 S5720-32X-EI-AC
<HUAWEI> display stack peers
Slot Port1 Peer1 Port2 Peer2
---------------------------------------------------------------------------
0 STACK 1 1 STACK 2 None
1 STACK 1 None STACK 2 0
Common Causes
Procedure
Check the switch model.
Run the display device command to check the device model.
<HUAWEI> display device S5720-32X-EI-AC's Device status: Slot Sub Type Online Power Register Status Role ------------------------------------------------------------------------------- 0 - S5720-32X-EI Present PowerOn Registered Normal Master
Check that a correct electronic label has been loaded to the switch.
Run the display elabel command to view the electronic label.
<HUAWEI> display elabel /$[System Integration Version] /$SystemIntegrationVersion=3.0 [Slot_0] /$[Board Integration Version] /$BoardIntegrationVersion=3.0 [Main_Board] /$[ArchivesInfo Version] /$ArchivesInfoVersion=3.0 [Board Properties] BoardType=S5720-EI BarCode=210235958601xxxxxxxx Item=02359586 Description=S5720-32X-EI-AC(24 Ethernet 10/100/1000 ports,4 100/1000 SFP,4 10 Gig SFP+,AC 110/220V) Manufactured=2014-05-15 VendorName=Huawei IssueNumber=00 CLEICode= BOM=02359586
If all fields under [Board Properties] are empty, no electronic label has been loaded to the switch. Replace the switch.
If fields under [Board Properties] are not empty, an electronic label has been loaded to the switch. Proceed to the next step.
Check the electronic label of the stack card. This step is not required on a switch that uses stack card stacking with stack ports fixed on the rear panel.
Run the display elabel slot slot-id subcard-id command to check the electronic label of the stack card. slot-id indicates the stack ID and you can obtain it from the output of the display stack command. subcard-id indicates the subcard ID which is 1 in a stack. For example, to view the stack card electronic label on a switch with stack ID 0, run the display elabel slot 0 1 command.
<HUAWEI> display elabel slot 0 1 /$[System Integration Version] /$SystemIntegrationVersion=3.0 [Slot_0] /$[Board Integration Version] /$BoardIntegrationVersion=3.0 [Main_Board] /$[ArchivesInfo Version] /$ArchivesInfoVersion=3.0 [Board Properties] BoardType=S5720-EI BarCode=0302MDW Item= Description=Dedicated stack card with 2*QSFP+ interface(Including one PCS of 1M QSFP+ cable ,Used in S5720-EI series) Manufactured=2014-07-07 VendorName=Huawei IssueNumber=00 CLEICode= BOM=
If all fields under [Board Properties] are empty, the stack card is not functioning properly. Replace the stack card.
If fields under [Board Properties] are not empty, an electronic label has been loaded to the switch. Proceed to the next step.
Check the stack cables.
Run the display stack port [ brief | slot slot-id ] command to check whether stack cables are correctly connected.
<HUAWEI> display stack port slot 0
stack-port0/1:
---------------------------------------------
Current state : UP
Speed : 21000
Input: 231394 packets, 45889632 bytes
Unicast: 231025, Multicast: 0
Broadcast: 0, Jumbo: 369
Discard: 0, Frames: 0
Total Error: 0
CRC: 0, Giants: 0
Jabbers: 0, Fragments: 0
Runts: 0, DropEvents: 0
Alignments: 0, Symbols: 0
Ignoreds: 0
Output: 247387 packets, 42114410 bytes
Unicast: 246108, Multicast: 989
Broadcast: 0, Jumbo: 290
Discard: 0
Total Error: 0
Collisions: 0, ExcessiveCollisions: 0
Late Collisions: 0, Deferreds: 0
Buffers Purged: 0
If the Current state of a stack port on the switch is UP, proceed to the next step.
If a stack port status is DOWN, check whether the switch connected to the port has been powered off or is restarting. If so, check whether the stack port status is Up after the connected switch restarts. If not, replace the stack cable.
If the fault persists, proceed to the next step.
Check whether the stack reserved VLAN is occupied.
Run the display stack command to check the reserved VLAN of a member switch. By default, the reserved VLAN is 4093.
Run the display vlan vlan-id command. If the reserved VLAN is not occupied, proceed to the next step.
<HUAWEI> display vlan 4093
Error: The VLAN does not exist.
If the reserved VLAN is occupied, run either of the following commands to rectify the fault:
If the fault persists, proceed to the next step.
Check whether MAC addresses of member switches conflict with each other.
Run the display stack command to check whether the MAC address of the switch to be added to the stack conflicts with the MAC address of an existing member switch. If not, proceed to the next step.
<HUAWEI> display stack Stack mode: Service-port Stack topology type: Link Stack system MAC: 0200-0000-01ab MAC switch delay time: 10 min Stack reserved vlan: 4093 Slot of the active management port: 0 Slot Role Mac address Priority Device type ------------------------------------------------------------- 0 Master 0200-0000-01ab 255 S5720-32X-EI-AC 1 Standby 0200-0000-0000 200 S5720-32X-EI-AC