If a stack fails to be established, you can log in to the stack and run commands to check whether the stack topology corresponds to 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 S5720-28P-LI-AC's Device status: Slot Sub Type Online Power Register Status Role ------------------------------------------------------------------------------- 0 - S5720-28P-LI Present PowerOn Registered Normal Master 1 - S5720-28P-LI 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: 0018-82b1-6eb4 MAC switch delay time: 2 min Stack reserved VLAN: 4093 Slot of the active management port: 0 Slot Role Mac address Priority Device type ------------------------------------------------------------- 0 Master 0018-82b1-6eb4 200 S5720-28P-LI-AC 1 Standby 0018-82b1-6eba 150 S5720-28P-LI-AC
<HUAWEI> display stack peers
Slot Port1 Peer1 Port2 Peer2
---------------------------------------------------------------------------
0 STACK 1 1 STACK 2 None
1 STACK 1 None STACK 2 0
<HUAWEI> display stack port
*down : administratively down
(r) : Runts trigger error down
(c) : CRC trigger error down
(l) : Link-flapping trigger error down
Logic Port Phy Port Online Status
----------------------------------------------------------------------------
stack-port0/1 GigabitEthernet0/0/27 present up
stack-port1/2 GigabitEthernet1/0/28 present up
<HUAWEI> display stack channel all
! : Port have received packets with CRC error.
L-Port: Logic stack port
P-Port: Physical port
Slot L-Port P-Port Speed State || P-Port Speed State L-Port Slot
---------------------------------------------------------------------------------------
1 1/2 GE1/0/28 2G UP GE2/0/27 2G UP 2/1 2
2 2/1 GE2/0/27 2G UP GE1/0/28 2G UP 1/2 1
---------------------------------------------------------------------------------------
Common Causes
Procedure
Check the switch model.
Run the display device command to check the device model.
<HUAWEI> display device S5720-28P-LI-AC's Device status: Slot Sub Type Online Power Register Status Role ------------------------------------------------------------------------------- 0 - S5720-28P-LI 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=CX22EMGEB BarCode=21023518320123456789 Item=02351832 Description=S5720-28P-LI,LS5ZC48CM,S5720-28P-LI Mainframe Manufactured=2009-02-05 VendorName=Huawei IssueNumber= CLEICode= BOM=
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 stack cables.
Run the display stack port command to check whether stack cables are correctly connected.
<HUAWEI> display stack port
*down : administratively down
Logic Port Phy Port Online Status
----------------------------------------------------------------------------
stack-port0/1 GigabitEthernet0/0/1 present up
stack-port1/2 GigabitEthernet1/0/1 present up
If the stack member ports are in the up state, proceed to the next step.
If the status of a stack member port is in the down state, check whether the switch connected to the port has been powered off or is restarting. If so, check whether the port status is in the Up state 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 4093 is not occupied, proceed to the next step.
<HUAWEI> display vlan 4093
Error: The VLAN does not exist.
If the reserved VLAN 4093 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: 0018-82b1-6eb4 MAC switch delay time: 2 min Stack reserved vlan: 4093 Slot of the active management port: -- Slot Role Mac address Priority Device type ------------------------------------------------------------- 0 Master 0018-82b1-6eb4 200 S5720-28P-LI-AC 1 Standby 0018-82b1-6eba 150 S5720-28P-LI-AC