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huud

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August 5th, 2025 11:55

S5248F-ON | OS10 Enterprise | Port-Channel Member Disabled..

Hi,

I have 2 ports configured in Port-Channel9, 1 port was removed and added again by a colleague in June, wasn't checked back then. Upon checking now its showing as 1 port Disabled.

I performed no shut, reconfigured port 1/1/18 with the below command, no error but still does not work..

LD3-ToR-03(conf-if-eth1/1/18)# channel-group 9 mode active

I'm unsure if there is any other configuration I'm missing..

I have attempted to readd it to the port channel but does not seem to work, its showing Line Speed 0, unsure what configuration is missing.

Relevant Port-Channel configurations (only relevant to port-channel 9, ports 17 and 18)..

LD3-ToR-03# show port-channel summaryGroup Port-Channel           Type     Protocol  Member Ports--------------------------------------------------------------------------------9    port-channel9    (U)     Eth      DYNAMIC   1/1/17(P) 1/1/18(D)

LD3-ToR-03# show interface ethernet 1/1/17Ethernet 1/1/17 is up, line protocol is upPort is part of Port-channel 9...LineSpeed 25G, Auto-Negotiation onLD3-ToR-03# show interface ethernet 1/1/18Ethernet 1/1/18 is up, line protocol is downPort is part of Port-channel 9...LineSpeed 0, Auto-Negotiation on

LD3-ToR-03# show lacp interface ethernet 1/1/17Interface ethernet1/1/17 is upChannel group is 9 port channel is 9Individual: false...Operational key=9LACP_Activity=activeLACP_Timeout=Long Timeout(30s)Synchronization=IN_SYNCCollecting=trueDistributing=truePartner information refresh timeout=Short Timeout(3s)...LACP_Activity=activeLACP_Timeout=Short Timeout(1s)Synchronization=IN_SYNCLD3-ToR-03# show lacp interface ethernet 1/1/18Interface ethernet1/1/18 is downChannel group is 9 port channel is 9Individual:...LACP_Activity=passiveLACP_Timeout=Long Timeout(30s)Synchronization=OUT_OF_SYNC...Neighbor:MAC Address=System Identifier=,Port Identifier=,Operational key=LACP_Activity=passiveLACP_Timeout=Long Timeout(30s)Synchronization=OUT_OF_SYNCCollecting=falseDistributing=false

Any thing else I can do ?

huud

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81 Posts

August 5th, 2025 12:03

Not sure why the code formatting is not retained..

DELL-Charles R

Moderator

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4.4K Posts

August 5th, 2025 17:05

Hello,

 

From your output:

  • Port 1/1/18 is:
    • Line protocol down
    • LineSpeed 0
    • LACP mode passive
    • Synchronization = OUT_OF_SYNC

This suggests that LACP negotiation is failing, and the port is not forming a valid LACP relationship with its peer.

 

Ensure Both Are in LACP Active Mode

Your config shows:

LD3-ToR-03(conf-if-eth1/1/18)# channel-group 9 mode active

 

But show lacp interface ethernet 1/1/18 still shows:

LACP_Activity=passive

This implies the configuration did not apply correctly.

 

Try the following:

LD3-ToR-03# configure terminal
LD3-ToR-03(config)# interface ethernet 1/1/18
LD3-ToR-03(conf-if-eth1/1/18)# no channel-group
LD3-ToR-03(conf-if-eth1/1/18)# exit
LD3-ToR-03(config)# interface ethernet 1/1/18
LD3-ToR-03(conf-if-eth1/1/18)# channel-group 9 mode active
LD3-ToR-03(conf-if-eth1/1/18)# no shutdown

 

Then verify again:

LD3-ToR-03# show lacp interface ethernet 1/1/18

 

huud

1 Rookie

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81 Posts

August 6th, 2025 08:24

Hi Charles,

Thanks for reply..

I tried as you showed, no change still, below is the updated result..

LD3-ToR-03(conf-if-eth1/1/18)# no channel-group
LD3-ToR-03(conf-if-eth1/1/18)# exit
LD3-ToR-03(config)# interface ethernet 1/1/18
LD3-ToR-03(conf-if-eth1/1/18)# channel-group 9 mode active
LD3-ToR-03(conf-if-eth1/1/18)# no shutdown
LD3-ToR-03(conf-if-eth1/1/18)# exit

LD3-ToR-03# show lacp interface ethernet 1/1/18
Interface ethernet1/1/18 is down
  Channel group is 9 port channel is 9
  Individual:
  PDUS sent: 0
  PDUS rcvd: 0
  Marker sent: 0
  Marker rcvd: 0
  Marker response sent: 0
  Marker response rcvd: 0
  Unknown packetse rcvd: 0
  Illegal packetse rcvd: 0
Local Port:     MAC Address=
  System Identifier=,
  Port Identifier=,
  Operational key=
  LACP_Activity=passive
  LACP_Timeout=Long Timeout(30s)
  Synchronization=OUT_OF_SYNC
  Collecting=false
  Distributing=false
  Partner information refresh timeout=Long Timeout(90s)
Actor Admin State=BDFHJLNP
Actor Oper State=BDFHJLNP
Neighbor:
  MAC Address=
  System Identifier=,
  Port Identifier=,
  Operational key=
  LACP_Activity=passive
  LACP_Timeout=Long Timeout(30s)
  Synchronization=OUT_OF_SYNC
  Collecting=false
  Distributing=false
Partner Admin State=BDFHJLNP
Partner Oper State=BDFHJLNP

(edited)

huud

1 Rookie

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81 Posts

August 6th, 2025 08:25

Seems there is an issue, the output does not appear formatted..

DELL-Erman O

Moderator

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2.8K Posts

August 6th, 2025 11:09

Hi, 

It looks like the port still isn’t coming up properly. A few things you might want to check:

  • Cable or transceiver: Try swapping the cable or SFP with one that’s known to work — sometimes it’s just a hardware issue.
  • Peer port config: Make sure the port on the other switch is actually up and also set to LACP active. If both sides are passive, they won’t talk to each other.
  • Speed settings: Double-check that both ends are using compatible speed settings. If auto-negotiation isn’t working, maybe try setting the speed manually.

huud

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81 Posts

August 6th, 2025 12:19

Thanks Erman,

I'll get this checking and see how it goes..

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