Description

The User reported that they are seeing below errors continuously.

May 10 10:25:00 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:26:29 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:30:14 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:31:24 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:40:26 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:47:22 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds

Symptoms

>> "Interrupt throttling" logs are side effect of flooding of "Ethernet MAC Local Fault Delta Event". 
 
May 10 10:25:00 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:26:29 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:30:14 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:31:24 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:40:26 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds
May 10 10:47:22 %PFE-4: fpc2 XMCHIP(1): XMCHIP(1) XXLCE 0 Throttle: Interrupt throttling for 10 seconds

[May 16 14:35:24.080 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Detected Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.138 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Cleared Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.138 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Detected Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.220 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Cleared Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.276 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Detected Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.371 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Cleared Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.371 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Detected Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.457 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Cleared Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)
[May 16 14:35:24.499 LOG: Info] XMCHIP(1): XMCHIP(1): XXLCE0: Port Alarms: Detected Ethernet MAC Local Fault Delta Event for Port 0 (xe-2/2/0)

Solution

>> Please try to recover port using below procedure.
 
  1. Please try to change the optics.
  2. If this does not solve the problem, change the cable.
  3. If this does not solve the problem then move the connection to new port along with QSFP to see if we are seeing same logs again. You can validate it through "start shell pfe network fpc 2"

Modification History

2024-06-03 : Article Created