5130S-HI and terminal PC interconnection interface frequently down/up

Ethernet interface

2021-09-29 18:23:20 Published

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Network Topology

Multiple 5130S-HIs are interconnected with multiple terminals of different models through the distribution frame.

Problem Description

Some switch ports are up/down irregularly, affecting services. The faulty switch is not fixed, and the oscillating port on the faulty switch is not fixed. The faulty terminal is mainly the client"s office PC, and the oscillating time is irregular.

Process Analysis

1. On the switch port 2/0/23 that the terminal is directly connected to, it is found that there are a large number of abnormal lldp packets starting at 15:05; the lldp neighbor packets are unidirectional packets (similar to UDP packets) and are sent by the terminal. After the device receives the message, it will establish the lldp neighbor relationship or delete the lldp neighbor relationship accordingly; under normal circumstances, the PC generally generates this kind of log when the network cable is plugged in or the computer is turned on and off.

2. Checking the switch log, it is found that the flapping of the faulty port is simply the physical up/down of the network port first, and then the protocol up/down. The oscillation time is uncertain and the number of oscillations is not fixed.

%Jun 28 11:33:22:781 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/5 changed to down.

%Jun 28 11:33:22:789 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/5 changed to down.

%Jun 28 11:33:25:793 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/5 changed to up.

%Jun 28 11:33:25:796 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/5 changed to up.

%Jun 28 11:33:37:699 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/5 changed to down.

%Jun 28 11:33:37:703 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/5 changed to down.

%Jun 28 11:33:41:333 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/5 changed to up.

%Jun 28 11:33:41:336 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/5 changed to up.

%Jun 28 11:44:08:539 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/23 changed to down.

%Jun 28 11:44:08:544 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/23 changed to down.

%Jun 28 11:49:16:884 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/33 changed to up.

%Jun 28 11:49:16:886 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/33 changed to up.

%Jun 28 11:52:14:537 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 11:52:14:539 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 11:52:33:363 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 11:52:33:364 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 11:53:13:426 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 11:53:13:428 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 11:53:16:377 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 11:53:16:387 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 11:53:21:439 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 11:53:21:440 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 11:53:24:468 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 11:53:24:471 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 12:27:24:917 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 12:27:24:922 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 12:27:27:564 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 12:27:27:579 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 12:27:50:206 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 12:27:50:228 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to down.

%Jun 28 12:27:53:214 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 12:27:53:228 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/30 changed to up.

%Jun 28 12:58:23:321 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet1/0/24 changed to up.

%Jun 28 12:58:23:336 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet1/0/24 changed to up.

%Jun 28 13:12:03:091 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 13:12:03:099 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 13:12:05:982 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 13:12:05:984 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 13:12:14:803 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 13:12:14:806 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 13:12:18:321 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 13:12:18:333 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 14:06:25:091 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 14:06:25:095 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 14:06:27:998 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 14:06:28:002 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 14:06:40:807 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 14:06:40:810 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 14:06:43:677 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 14:06:43:680 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 14:06:52:705 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 14:06:52:712 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to down.

%Jun 28 14:06:56:239 2021 L2SW_03 IFNET/3/PHY_UPDOWN: Physical state on the interface GigabitEthernet2/0/3 changed to up.

%Jun 28 14:06:56:251 2021 L2SW_03 IFNET/5/LINK_UPDOWN: Line protocol state on the interface GigabitEthernet2/0/3 changed to up.

Perform on-site replacement tests on switches, patch panels, and terminals. Connect the faulty switch and the non-faulty terminal across the patch frame/not across the patch panel, and the fault remains. Connect the non-faulty switch and the faulty terminal across the patch frame/not across the patch panel, and the fault remains.

Provide test cases	Test Results	Test result description
Forced duplex rate of oscillating port	The port still oscillates	Port flapping has nothing to do with port negotiation issues
Switch ground	The port still oscillates	Port oscillation has nothing to do with static electricity
Cross test of faulty port and faulty pc	Port no longer oscillates	The oscillating port is not fixed, and the cause of the fault cannot be confirmed
Direct connection test between switch and pc (turn off dormancy)	Not currently fluctuating	Troubleshoot whether the patch panel is a problem
Turn off the PC network card dormancy test	Not currently fluctuating	Check whether PC dormancy causes port flapping

Subsequent tests have found that the terminal network card hibernates from time to time, during which the switch port will up/down, and the number of oscillations is related to the network card model. The cause of the failure has been found.

Solution

Modify the terminal hibernation mode so that the terminal does not hibernate and failures do not recur.

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5130S-HI and terminal PC interconnection interface frequently down/up

Network Topology

Problem Description

Process Analysis

Solution

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