FS S3410 Series LACP Gigabit Ethernet L2+ Fully Managed Pro User Manual

LACP Trouble Shooting
LACP TROUBLESHOOTING
Models: S3410 Series; S3910 Series; S5860 Series

Fault Phenomenon

Port aggregation is unsuccessful.

Possible Cause of Failure

1. physical link failure.
2. LACP negotiation was unsuccessful.
3. There is no change in the packet flow and the matching part of the balance factor.
4. The duplex, rate, and transmission medium at both ends are inconsistent.

Processing Steps

Check Whether There is a Link Failure On the Aggregation Member Port

FS#show interface status //Check whether the port status of the aggregation member port is up.
FS#show interfaces status

If the member port is down, check the physical port connection. Make sure the member is up. If conditions permit, replace other member ports, confirm whether the aggregation member port can be up, and exclude the member port from physical failure.

Check the Port Properties of Both Devices

Use the show interface XX command to view the port’s media properties, focusing on the port’s speed, flow control, and media type, and it needs to be configured in full-duplex mode to eliminate the problem that the port cannot be up
FS#show interfaces ten gigabit ethernet 0/19
Index(dec):19 (hex):13
TenGigabitEthernet 0/19 is UP , line protocol is UP
Hardware is TenGigabitEthernet, address is 300d.9e43.38de (bia 300d.9e43.38de)
Interface address is: no ip address
Interface IPv6 address is:
No IPv6 address
MTU 1500 bytes, BW 10000000 Kbit
Encapsulation protocol is Ethernet-II, loopback not set
Keepalive interval is 10 sec, set
Carrier delay is 2 sec
Ethernet attributes:
Last link-state change time: 2020-07-15 10:10:35
Time duration since last link-state change: 0 days, 0 hours, 12 minutes, 29 seconds
Priority is 0
Medium-type is Fiber
Admin duplex mode is AUTO, oper duplex is Full
Admin speed is AUTO, oper speed is 10G
Flow control admin status is OFF, flow control oper status is OFF
Admin negotiation mode is OFF, oper negotiation state is OFF
Storm Control: Broadcast is OFF, Multicast is OFF, Unicast is OFF
Reload is 1/255, Txload is 1/255
Input peak rate: 205 bits/sec, at 2020-07-15 10:11:45
Output peak rate: 304 bits/sec, at 2020-07-15 10:11:45
10 seconds input rate 0 bits/sec, 0 packets/sec
10 seconds output rate 0 bits/sec, 0 packets/sec
29 packets input, 6616 bytes, 0 no buffer, 0 dropped
Received 1 broadcasts, 0 runts, 0 giants
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 abort
52 packets output, 9512 bytes, 0 underruns, 0 no buffer, 0 dropped
0 output errors, 0 collisions, 0 interface resets

Check Whether the Link Aggregation Member Ports and Link Aggregation

Groups Are Normal

State: Member port negotiation status, and indicates that the negotiation is successful, susp indicates that the negotiation fails, and down indicates that the link status of the interface is down
FS#show lacp summary 1
System Id:32768, 300d.9e7a.74c0
Flags: S – Device is requesting Slow LACPDUs F – Device is requesting Fast LACPDUs.
A – The device is inactive mode.
P – The device is in passive mode.
Aggregate port 1:
Local information:

| | | LACP port| Oper| Port| Port
---|---|---|---|---|---|---
Port| Flags| State| Priority| Key| Number| State
Te0/19| SA| bndl| 32768| 0x1| 0x13| 0x3d
Te0/20| SA| bndl| 32768| 0x1| 0x14| 0x3d
Partner information:
| | LACP port| Oper| Port| Port
Port| Flag| Priority| Dev ID| Key| Number| State
Te0/19| SA| 32768| 300d.9e43.38de| 0x1| 0x13| 0x3d
Te0/20| SA| 32768| 300d.9e43.38de| 0x1| 0x14| 0x3d

FS#show aggregatePort 1 summary

AggregatePort :AP Interface name
MacPorts: AP The maximum number of interfaces that can be supported.
Switchport: AP Whether the interface is a Layer 2 port, Enabled indicates a Layer 2 port, and Disabled indicates not a Layer 2 port.
Mode: AP The attributes of the Layer 2 interface of the interface, including ACCESS, TRUNK, TUNNEL, HYBRID, UPLINK, HOST, and PROMIS, when the AP interface is not a Layer 2 interface, the display is empty. Load balance: AP Balance mode of the interface.
Ports: AP Balance mode of the interface.

Check the Aggregation Port Configuration is Correct

FS#show running-config interface TenGigabitEthernet 0/19
Building configuration…
Current configuration: 62 bytes
interface TenGigabitEthernet 0/19
port-group 1 mode active
There are two LACP port modes: Active and Passive

Check Whether the Configuration Of The Peer Device is Correct

If the LACP mode of both ports of the device is the passive mode, the aggregation relationship cannot be established. Both ends are in active mode or one side is in active mode and one is in passive mode.

Seek FS Technical Support

If the fault cannot be solved after the above steps are checked, please collect the following fault information and contact FS technical support for assistance.
show run
show version
show version slot
show lacp summary X
show lacp summary X
show logging

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