Ethernet port very slow connection after UPS down

[Salauat]

I have Cisco 2960c-12pc-l . Was working great for last 10 years, recently experienced UPS power fluctuation and finally switching itself off. After connecting the power to switch via power socket, I have noticed the Ethernet connection is very poor quality - almost zero connectivity to Internet/Local Network.

Tried different cables on different ports, not working. Tried upgrading firmware and laptop network drivers.

The Linksys router connects to switch's Gigabit port and shows purchased connection speed.

However it doesnt work to Fast Ethernet ports.

Attaching my laptop connected port configuration and show config. First couple minutes Ethernet connection works fine, then the speed goes to zero.

FastEthernet0/11 is up, line protocol is up (connected)
  Hardware is Fast Ethernet, address is 2834.a267.920b (bia 2834.a267.920b)
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 100Mb/s, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 8000 bits/sec, 8 packets/sec
  5 minute output rate 16000 bits/sec, 13 packets/sec
     1219 packets input, 192096 bytes, 0 no buffer
     Received 656 broadcasts (495 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 495 multicast, 0 pause input
     0 input packets with dribble condition detected
     1731 packets output, 451327 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out

[balaji.bandi]

it is simple config, nothing complicated.

how is your ISP provider connection connected to this switch (what port)

Do below test :

can you connect that cable to your Laptop and test it, what is your observation is that good (we are by pass switch and see if that make any difference)

hope that help us to guide correctly.

[Salauat]

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@balaji.bandi wrote:

it is simple config, nothing complicated.

how is your ISP provider connection connected to this switch (what port)

Do below test :

can you connect that cable to your Laptop and test it, what is your observation is that good (we are by pass switch and see if that make any difference)

hope that help us to guide correctly.

---

Hello, thank you for prompt reply. Attached the speed test from R1-Laptop

My connection is like this:

Both R1, R2 connects to Gig ports on Cisco Switch.

ISP - R1(Huawei) - Cisco Switch (cisco 2960c-12pc-l) - R2(Linksys)

[Salauat · Accepted solution]

Hey everyone, I run test that didnt perform previously.

I connected another laptop to the problem switch, to same port (as previous laptop) and the speed is very high.

Seems the problem is with my laptop network card.

Not sure, if this community can help to solve such issues.

If yes, can you advise at least next steps?

[balaji.bandi]

is this output you have attached when you connect directly to ISP ? or using switch ?

Do you have single ISP connection ?

unplug the linksys router and test.

[Engineer-US]

May be because  Full-duplex !!

Full-duplex, 100Mb/s, media type is 10/100BaseTX

[Engineer-US]

Sorry, ignore my comment.