Different network speeds on same device with different switches

[NetworkSCRB]

Hello,

I have run into an "issue" that I cannot seem to crack.... I have a C9300-24UX running version 16.6.2 and a WS-C3560X-48 running version 12.2(53)SE2. I had a wireless AP connected to the 3560 that was getting around 250Mbps, and when that same AP is moved to the C9300-24UX it only gets 100Mbps.

The configuration for the interfaces that connect to the wireless is just a trunk port. the uplink interface to the upstream core switch that both switches connect to is another C9300. The interfaces are configured as trunk ports.

I have checked the interface counters for errors, forced speed 1000 on the C9300 interfaces, ensured the configs were exactly the same for the interfaces on both switches and couldn't find the culprit.

Thanks.

[balaji.bandi]

Cat 9300 Stackable 24 Multigigabit Ethernet (100 Mbps or 1/2.5/5/10 Gbps) UPOE ports - So check the AP negotiating what speed ?

Can you post interface config of both working and not working, along with show interface gi x/x  from both the switches ?

how about when you connect device to etherent port on Cat 9300 and test ? what speed you get ?

are you using same Client device to connect and test both scenarios ?

[NetworkSCRB]

Yes I am using my cellphone to run the speedtest and standing in the same location for the tests. I have not tested speeds for wired clients yet, I will check...

The configs are the following:

C9300 Configs

interface TenGigabitEthernet1/0/24
switchport trunk native vlan 10
switchport mode trunk
speed 1000

C3560X Configs

interface GigabitEthernet0/35
switchport trunk encapsulation dot1q
switchport trunk native vlan 10
switchport mode trunk

I forced the 1000Mbps speed on the C9300 for testing but the interface did auto negotiate to 1000Mbps on its own. I have attached the interface output as photos

[balaji.bandi]

as per the screenshot i see  INPUT and CRC error

1. i would re-visit check the Physical patch cable and use new one.

2. issue in the port - switchport nonegotiate

3. shutdown the port - change the with new cable connecting AP.

4. clear the interface counters

5. no shutdown and re do the test and post same output again here.