Unknown-duplex

[eXPlosion_]

Hi,

in switch logs we are getting unknown-duplex

%%10LLDP/5/LLDP_DUPLEX_INCONSISTENT(l): -Slot=2; The mode of duplex mismatch discovered on GigabitEthernet2/0/7 (Full-duplex), with @▒▒V▒ (Unknown-duplex).

Are these symbols normal switch behaviour? Thanks

[Dennis Handly]

What model switch do you have?

[eXPlosion_]

Comware Software, Version 5.20.99, Release 2222P08
Copyright (c) 2010-2017 Hewlett Packard Enterprise Development LP
HP A5120-48G-PoE+ EI Switch with 2 Interface Slots 

[eXPlosion_]

Anyone?

It started to show after firmware upgrade, here are one more line:

%%10LLDP/5/LLDP_DUPLEX_INCONSISTENT(l): -Slot=2; The mode of duplex mismatch discovered on GigabitEthernet2/0/30 (Full-duplex), with  (▒DM ▒ (Unknown-duplex).

[Trackhappy]

I am also getting this on random ports. HP A5120-48G-PoE+ EI Switch. Comware Software, Version 5.20.99, Release 2222P07. Started happening after upgrading to this version. 

%Apr 23 08:12:15:928 2018 ***_Edge_Stack LLDP/5/LLDP_DUPLEX_INCONSISTENT: -Slot=2; The mode of duplex mismatch discovered on GigabitEthernet2/0/17 (Full-duplex), with  D[xú (Unknown-duplex).

%Apr 23 08:05:09:255 2018 ***_Edge_Stack LLDP/5/LLDP_DUPLEX_INCONSISTENT: The mode of duplex mismatch discovered on GigabitEthernet1/0/5 (Full-duplex), with  D[x! (Unknown-duplex).

[MichaelM55]

Similar issue. User reports problems:

HPE Comware Platform Software
Comware Software, Version 5.20.99, Release 2222P10
Copyright (c) 2010-2018 Hewlett Packard Enterprise Development LP
HP A5500-24G EI Switch with 2 Interface Slots uptime is 12 weeks, 4 days, 12 hours, 15 minutes

%Nov 26 08:35:55:716 2018 netz-service.sys.swch.roacf21m LLDP/5/LLDP_DUPLEX_INCONSISTENT: -Slot=1; The mode of duplex mismatch discovered on GigabitEthernet1/0/11 (Full-duplex), with  ▒ʸ\▒w (Unknown-duplex).

>dis int gig 1/0/11
 GigabitEthernet1/0/11 current state: UP
 IP Packet Frame Type: PKTFMT_ETHNT_2, Hardware Address: 4001-c65e-65a1
 Description: GigabitEthernet1/0/11 Interface
 Loopback is not set
 Media type is twisted pair
 Port hardware type is  1000_BASE_T
 1000Mbps-speed mode, full-duplex mode
 Link speed type is autonegotiation, link duplex type is autonegotiation
 Flow-control is not enabled
 The Maximum Frame Length is 9216
 Broadcast MAX-ratio: 100%
 Unicast MAX-ratio: 100%
 Multicast MAX-ratio: 100%
 Allow jumbo frame to pass

dis mac-address | inc 1/0/11
f8ca-b85c-8261 1        Learned        GigabitEthernet1/0/11    AGING

 => Dell laptop

[ScottStorm]

Wondering if this was ever resolved as I currently have about 50 switches with the same issue

[sdide]

Hi,

was wondering if the issue is related to flow-control?
HP A5500 - Autonegotiation and Flow Control 

Maybe try and fiddle with the flow-control configuration on the affected interfaces. That is:

interface Gi1/0/<some_affected_interfacenumber> 
  flow-control  
\\ to enable TxRx flowcontrol OR
  flow-control receive enable 
\\ to enable Rx flowcontrol only.

[Lilooman]

Same issue here.

I have several HPE 5120-48G and HPE 5120-24G with different firware versions (P08 to P11).
I don't have this issue with my HPE-5130 switches.

I have done tests and here's what I've noticed :

- Have an access to the network even with this error message
- No error message with some devices (not computers)
- "undo lldp enable" on the ports -> no error message (it may be obvious but it can maybe help)

If anyone has an idea on how to "fix" this issue or an explanation about why it appears, it'd be glad to hear it.