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Fubr
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Cisco Switch slow_Faulty Link

Good Morning all you Cisco superheroes!!

I am having a problem between switches (closets-to-closet), and need some help because I am beside myself trying to figure this out. Here is the rundown of our building and equipment.

We have a big building that is divided into 3 sections. Main sections with a 2 (WS-C2960X-48TS-L) gigabit switches that feed the next section. This closet has another 48 port gigabit switch (WS-C2960X-48TS-L), which feed the last section of the building and it has another 48 port gigabit switch (WS-C2960X-48TS-L).

Distance between the 2nd and 3rd closet is less than 200 feet. CAT 6 cable between the two switches (patch panel –to- patch panel).

Been having issues with the 3rd closet switch being slow, Autonegotiation at 100 Mbps and Half Duplex.

Let me backup here for some history on this closet. This closet (3rd) use to have a 10/100 Cisco switch and it did the same thing (autonegotiation), and client speed when downloading a file from server was around 10-12 MB/second. Needing more ports we upgraded to the new 48 port gigabit switch we now have and the clients speed for downloading from the server is horribly slow 125-256 KB/second…..

For whatever reason the switch in the 3rd closet is Autonegotiation at 100 Mbps and Half Duplex and flashing orange every so often saying “Faulty Link”.  (was this way on both 10/100 and 10/100/1000 switches)

I have tried to manually change the port setting to full duplex and I loose connection to the switch and have to repatch to a different port to connect back up and change back to “Auto” on the port.

Here is the interface status results on this switch: (port Gi 1/0/1 is the port connecting between closets)
NCS-SW1#show interface status

Port      Name               Status       Vlan       Duplex  Speed Type
Gi1/0/1                     connected    trunk      a-half  a-100 10/100/1000BaseTX
Gi1/0/2                      connected    1          a-full a-1000 10/100/1000BaseTX
Gi1/0/3                      notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/4                      connected    1          a-full a-1000 10/100/1000BaseTX
Gi1/0/5                      connected    1          a-full a-1000 10/100/1000BaseTX

Here is the same command on the switch in the 2nd closet:  (port Gi 1/0/15 is the port connecting to closet 3)
HQ-IDF-SW1#show interface status

Port      Name               Status       Vlan       Duplex  Speed Type
Gi1/0/1                      connected    trunk      a-full  a-100 10/100/1000BaseTX
Gi1/0/2                      notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/3                      connected    1          a-full a-1000 10/100/1000BaseTX
Gi1/0/4                      notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/5                      connected    1          a-full  a-100 10/100/1000BaseTX
Gi1/0/6                      connected    1          a-full  a-100 10/100/1000BaseTX
Gi1/0/7                      notconnect   1            auto   1000 10/100/1000BaseTX
Gi1/0/8                      notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/9                      connected    1          a-full  a-100 10/100/1000BaseTX
Gi1/0/10                     connected    1          a-full  a-100 10/100/1000BaseTX
Gi1/0/11                     notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/12                     notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/13                     connected    1          a-full  a-100 10/100/1000BaseTX
Gi1/0/14                     notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/15                     connected    trunk        half    100 10/100/1000BaseTX
Gi1/0/16                     notconnect   1            auto   auto 10/100/1000BaseTX
Gi1/0/17                     notconnect   1            auto   auto 10/100/1000BaseTX

They are for whatever reason Autonegotiation at 100 Mbps and Half Duplex.

I have tested the line (cabling – CAT6) between switches (patch panel –to- patch panel) and it has tested good (for pairs – don’t have any other kind of tester).
I tested the patch cables – all good.
I can ping all over the building fine (with good ping times - <1ms). But line speed is horribly slow!

Anyone shed some light on this, because I am just sitting here scratching my head on what to do next.

Enclosed is a running config of this switch. It is pretty basic right  now.

Thanks in advanced

    Fubr
NEC-2960X-Switch-Config_04-2017.txt
CiscoSwitches / Hubs

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Fubr

8/22/2022 - Mon
Harold Bowlin

When you say you manually changed the settings, did you do it on both sides?

Speed 1000
duplex full
Fubr

ASKER
no I did not, just on the 3rd switch.
After it kick me off I was kind of gun shy....

if I do it on both, you think the connect will pick back up?

    Fubr
ASKER CERTIFIED SOLUTION
Harold Bowlin

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Fubr

ASKER
I will go and try it now......keep fingers crossed!!


    Fubr
All of life is about relationships, and EE has made a viirtual community a real community. It lifts everyone's boat
William Peck
Fubr

ASKER
I did the 2nd closet switch first and the 3rd auto up to the speed 1000 and Full Duplex!
Didn't kick me off.

Looks like the orange (amber) flashing light (faulty port) has went away also!!

I should have done this earlier, but got gun shy when it kick me off.
SWEET!!

Thank you Harold!

   Fubr
Harold Bowlin

No problem. Just please pick an answer so this thing doesn't notify me in a few days....LOL.
Fubr

ASKER
You Da-Man Harold
Thanks

   Fubr
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