Checking Whether a Stack Is Established Through Service Port Connections
After the stack powered on, review key indicators to confirm the stack has been established successfully. If the stack has been successfully established, log in to the stack and run commands to confirm that the stack topology matches the hardware connections. If a stack has not been established, log in to the stack (multiple independent switches) and run commands to locate and resolve the issues.
Reviewing Key Indicators to Confirm that a Stack Has Been Established
Context
After the stack powered on, review key indicators on the switch panels to confirm the stack has been established successfully.
Procedure
Press the mode switching button on any member switch to set the mode status indicator to work in STACK mode. A switch has a STCK indicator, which indicates the stack mode status. After you press the MODE button, the indicator is steady green or blinking and off in 45 seconds, indicating that the switch has entered the STACK mode.
- If the mode status indicators on all the member switches change to the STACK mode, the stack has been established successfully. You can determine the stack IDs of the master switch and member switches by viewing the mode status indicator and service port indicators.
- If the mode status indicators on some member switches do not change to the STACK mode, the stack has not been established.
- Determine the stack IDs of the master switch and member switches through the status of service port indicators. Table 9-28 explains how to interpret service port indicators in STACK mode.Table 9-28 Service port indicators in STACK mode
Color Status and Meaning Off
Port indicators do not indicate the stack ID of the switch.
Green
If the indicator is steady on, the switch is not the master switch in the stack. If the indicator is blinking, the switch is the master switch in the stack.- If the indicator of a port is steady on, the switch where this port is located is not the master switch, and the number of this port is the stack ID of this switch.
- If the indicator of a port is blinking, the switch where this port is located is the master switch, and the number of this port is the stack ID of this switch.
- If the first nine port indicators of the switch are steady on, this switch is not the master switch, and its stack ID is 0.
- If the first nine port indicators of the switch are blinking, this switch is the master switch, and its stack ID is 0.
Logging In to a Stack to Confirm a Stack Has Been Established
Context
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.
Procedure
Log in to the stack.
You can log in to a stack using the following methods:- Local login: Log in through the console interface of any member switch.
- Remote login: Log in through the management interface or another
Layer 3 interface of any member switch. You can remotely log in to
the stack using Telnet, STelnet, web, or SNMP if your operation terminal
has a reachable route to the stack.
After switches with management interfaces form a stack, only the management interface on one member switch takes effect and becomes the master management interface. After the stack starts, the management interface on the master switch is used as the master management interface. If the management interface on the master switch is faulty or unavailable, the management interface on another member switch is used as the master management interface. If you connect your PC directly to a non-master management interface, you cannot log in to the stack.
After a stack is set up, all the member switches use the configuration file of the master switch.
A stack externally acts as a single switch and uses one management IP address. To remotely log in to a stack, you need to log in to the IP address of the master switch.
All stack member switches are able to forward traffic.
Check whether the stack has been established successfully.
Run the display device command to check whether the number of member switches in the stack is the same as the number of switches in the networking.<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
- If they are the same, go to step 3.
- If they are different, see Rectifying Common Stack Faults.
- Check whether the stack topology is the same as the actual hardware connections.
Run the display stack command to 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 100 S5720-28P-LI-AC 1 Standby 0018-82b1-6eba 100 S5720-28P-LI-AC
Run the display stack peers command to check whether neighboring information about the stack is the same as the actual hardware connections.
<HUAWEI> display stack peers Slot Port1 Peer1 Port2 Peer2 --------------------------------------------------------------------------- 0 STACK 1 1 STACK 2 None 1 STACK 1 None STACK 2 0Run the display stack port command to view information about physical member ports added to a logical stack port.
<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 GigabitEthernet0/0/26 present up stack-port1/2 GigabitEthernet1/0/27 present upRun the display stack channel all command to check the stack link connections and status.
<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 GE1/0/27 2G UP GE2/0/26 2G UP 2/1 2 2 2/1 GE2/0/26 2G UP GE1/0/27 2G UP 1/2 1 ---------------------------------------------------------------------------------------
- If they are the same, the stack has been established successfully.
- If they are different, reconnect the member switches.
- If the fault persists, rectify the fault according to Rectifying Common Stack Faults.
Rectifying Common Stack Faults
Common Causes
- Switches of different models cannot set up a stack.
- A switch does not support the stacking function.
- A switch has no electronic label or an incorrect electronic label.
- Stack ports are incorrectly connected.
- Stack cables are faulty.
- The stack reserved VLAN is occupied.
- MAC addresses of stack member switches conflict.
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
- If switches of different models cannot set up a stack or a switch does not support the stacking function, replace the switch.
- If the switches support stacking, proceed to the next step.
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 upIf the physical member ports are in the Up state, proceed to the next step.
If the status of a physical 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 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:
- Run the stack reserved-vlan vlan-id command in the system view to modify the reserved VLAN.
- Delete services in the reserved VLAN and run the undo vlan vlan-id command in the system view to delete the VLAN.
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
- Collect the following information and contact technical support
personnel.
- Results of the preceding troubleshooting procedure
- Configuration file, logs, and alarms of switches
Relevant Alarms
- A stack port goes Up: FSP_1.3.6.1.4.1.2011.5.25.183.1.22.1 hwStackLinkUp
- A stack port goes Down: FSP_1.3.6.1.4.1.2011.5.25.183.1.22.2 hwStackLinkDown
- A switch has joined the stack: FSP_1.3.6.1.4.1.2011.5.25.183.1.22.6 hwStackStackMemberAdd
- A switch has left the stack: FSP_1.3.6.1.4.1.2011.5.25.183.1.22.7 hwStackStackMemberLeave
- Logical ports with the same ID on two switches are connected: FSP_1.3.6.1.4.1.2011.5.25.183.1.22.9 hwStackLogicStackPortLinkErr
- Physical ports of the same logical port are connected to different devices: FSP_1.3.6.1.4.1.2011.5.25.183.1.22.10 hwStackPhyStackPortLinkErr
Relevant Logs
None