High latency using 9115 AP

siugate — Mon, 05 Jul 2021 18:47:36 GMT

Recently we have deployed WiFi 6 solutions in company using 9115, 9800 and 9300-24ux. However, during our testing, we found that there is high latency, low speed transaction from endpoint to gateway or even to switch even placed the endpoint in different APs area.
We have countered checked in the GUI setting and switch configuration, everything that we set should be in place. .
Checking the switch log, we found that switch saying that AP is in half deplex and not match with switch setting, is it the above reason why the above happen?

any solution here as we cannot set or change the speed or interface setting in the AP at the 9800 GUI?

Re: High latency using 9115 AP

Rasika Nayanajith — Fri, 28 Feb 2020 21:41:57 GMT

when you check "show interfaces status" output on your switch and you see AP connected switchport negotiate to 10/100Mbps (instead of 1000Mbps), that could be the issue.

Port Name Status Vlan Duplex Speed Type
Gi1/0/12 AAP1 connected 40 a-fulla-1000 10/100/1000BaseTX

HTH

Rasika

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Re: High latency using 9115 AP

siugate — Sat, 29 Feb 2020 00:02:25 GMT

So is there any way to solve?

Re: High latency using 9115 AP

Rasika Nayanajith — Sat, 29 Feb 2020 00:44:00 GMT

Pls post "show interface status" & "show version" output from your switch. Try with different IOS-XE version on switch if possible.

Typically duplex auto & speed auto (default configuration) should allow AP to negotiate 1000Mbps/Full duplex. If it is not happening you can try manually speed 1000 & duplex full setting on switchport.

I would not think it is a problem with 9800.

HTH

Rasika

*** pls rate all useful responses ***

Re: High latency using 9115 AP

siugate — Sat, 29 Feb 2020 02:26:25 GMT

Here you are

Log Buffer (4096 bytes):
Power granted
*Feb 29 01:38:29.141: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on TenGigabitEthernet1/0/14 (not half duplex), with S-PP-L32-AP08 GigabitEthernet0 (half duplex).
*Feb 29 01:38:36.526: %ILPOWER-7-DETECT: Interface Te1/0/5: Power Device detected: IEEE PD
*Feb 29 01:38:37.309: %ILPOWER-5-POWER_GRANTED: Interface Te1/0/5: Power granted
*Feb 29 01:57:36.985: %CDP-4-DUPLEX_MISMATCH: duplex mismatch discovered on TenGigabitEthernet1/0/14 (not half duplex), with S-PP-L32-AP08 GigabitEthernet0 (half duplex).
*Feb 29 01:57:40.838: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 10.243.2.31] [localport: 22] at 09:57:40 HKT Sat Feb 29 2020

urrent Type Next reboot
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Smart Licensing Status: UNREGISTERED/EVAL MODE

cisco C9300-24UX (X86) processor with 1418970K/6147K bytes of memory.
Processor board ID FOC2402W0BE
2 Virtual Ethernet interfaces
4 Gigabit Ethernet interfaces
32 Ten Gigabit Ethernet interfaces
2 TwentyFive Gigabit Ethernet interfaces
2 Forty Gigabit Ethernet interfaces
2048K bytes of non-volatile configuration memory.
8388608K bytes of physical memory.
1638400K bytes of Crash Files at crashinfo:.
11264000K bytes of Flash at flash:.
0K bytes of WebUI ODM Files at webui:.

Base Ethernet MAC Address : 4c:e1:76:6f:b0:80
Motherboard Assembly Number : 73-18276-04
Motherboard Serial Number : FOC23524JDN
Model Revision Number : D0
Motherboard Revision Number : A0
Model Number : C9300-24UX
System Serial Number : FOC2402W0BE

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
* 1 40 C9300-24UX 16.9.5 CAT9K_IOSXE BUNDLE

Configuration register is 0x102

SW4-C9300#sh in
SW4-C9300#sh int
SW4-C9300#sh interfaces st
C9300#sh interfaces status

Port Name Status Vlan Duplex Speed Type
Te1/0/1 V145 notconnect 3809 auto 1000 100/1000/2.5G/5G/10GBaseTX
Te1/0/2 V146 notconnect 3809 auto 1000 100/1000/2.5G/5G/10GBaseTX
Te1/0/3 V147 notconnect 3809 auto 1000 100/1000/2.5G/5G/10GBaseTX
Te1/0/4 V148 notconnect 3809 auto 1000 100/1000/2.5G/5G/10GBaseTX
Te1/0/5 V149 notconnect 3809 auto 1000 100/1000/2.5G/5G/10GBaseTX
Te1/0/6 V150 notconnect 3809 auto 1000 100/1000/2.5G/5G/10GBaseTX
Te1/0/7 AP1 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX
Te1/0/8 AP2 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX
Te1/0/9 AP3 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX
Te1/0/10 AP4 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX
Te1/0/11 AP5 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX

Port Name Status Vlan Duplex Speed Type
Te1/0/12 AP6 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX
Te1/0/13 AP7 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX
Te1/0/14 AP8 connected 3820 a-full a-2500 100/1000/2.5G/5G/10GBaseTX
Te1/0/15 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/16 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/17 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/18 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/19 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/20 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/21 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/22 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX
Te1/0/23 notconnect 1 auto auto 100/1000/2.5G/5G/10GBaseTX

Port Name Status Vlan Duplex Speed Type
Te1/0/24 Temp_Link_To_20F notconnect 3820 auto 1000 100/1000/2.5G/5G/10GBaseTX
Te1/1/1 connected trunk full 10G SFP-10G-ACTIVE-CABLE
Te1/1/2 connected trunk full 10G SFP-10G-ACTIVE-CABLE
Te1/1/3 notconnect 1 auto auto unknown
Te1/1/4 notconnect 1 auto auto unknown
Te1/1/5 notconnect 1 auto auto unknown
Te1/1/6 notconnect 1 auto auto unknown
Te1/1/7 notconnect 1 auto auto unknown
Te1/1/8 notconnect 1 auto auto unknown
Po11 to_Core connected trunk a-full a-10G N/A
SW4-C9300#sh logging
Syslog logging: enabled (0 messages dropped, 1 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)

Cisco IOS XE Software, Version 16.09.05
Cisco IOS Software [Fuji], Catalyst L3 Switch Software (CAT9K_IOSXE), Version 16.9.5, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2020 by Cisco Systems, Inc.
Compiled Thu 30-Jan-20 18:53 by mcpre

ROM: IOS-XE ROMMON
BOOTLDR: System Bootstrap, Version 16.9.1r [FC2], RELEASE SOFTWARE (P)

SW4-C9300 uptime is 12 hours, 14 minutes
Uptime for this control processor is 12 hours, 20 minutes
System returned to ROM by Reload Command
System image file is "flash:cat9k_iosxe.16.09.05.SPA.bin"
Last reload reason: Reload Command

Technology Package License Information:

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Technology-package Technology-package
Current Type Next reboot
------------------------------------------------------------------------------
network-essentials Smart License network-essentials
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Smart Licensing Status: UNREGISTERED/EVAL MODE

cisco C9300-24UX (X86) processor with 1418970K/6147K bytes of memory.
Processor board ID FOC2402W0BE
2 Virtual Ethernet interfaces
4 Gigabit Ethernet interfaces
32 Ten Gigabit Ethernet interfaces
2 TwentyFive Gigabit Ethernet interfaces
2 Forty Gigabit Ethernet interfaces
2048K bytes of non-volatile configuration memory.
8388608K bytes of physical memory.
1638400K bytes of Crash Files at crashinfo:.
11264000K bytes of Flash at flash:.
0K bytes of WebUI ODM Files at webui:.

Base Ethernet MAC Address : 4c:e1:76:6f:b0:80
Motherboard Assembly Number : 73-18276-04
Motherboard Serial Number : FOC23524JDN
Model Revision Number : D0
Motherboard Revision Number : A0
Model Number : C9300-24UX
System Serial Number : FOC2402W0BE

Re: High latency using 9115 AP

Scott Fella — Sat, 29 Feb 2020 04:09:25 GMT

Have you verified the cabling is fine? You can either have the cable run tested and the patch or even try running a tdr test on the port. You can also swap that ap with a known good ap and see if the issue follows the ap or not. This will help isolate the issue.

Re: High latency using 9115 AP

Cristian Matei — Sat, 29 Feb 2020 14:44:57 GMT

Hi,

Most probably you're hitting a bug: https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvr50556/?rfs=iqvred

Regards,

Cristian Matei.

Re: High latency using 9115 AP

siugate — Mon, 02 Mar 2020 01:29:33 GMT

HI Team,

Thx and finally, we need to open TAC case to fix

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