Connectivity lost after reconnect fiber port in X450

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  • Updated 7 days ago
We have this configuration:

create vlan net tag 20
configure net ipaddress xxx.xxx.xxx.xxy 255.255.255.0
configure vlan net add ports 51 untagged

No issues executing ping to another device in xxx.xxx.xxx.0

If we unplug fiber cable and plug it  we can't access network through console and devices connected to X450

Do we need another conf to restore net connectivity?

Thanks in advance


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Pionio

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Posted 1 week ago

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Ronald Dvorak, Embassador

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If we unplug fiber cable and plug it  we can't access network through console and devices connected to X450
Could you please explain it in more detail as I don't get it - give us exact details - I disconnected port#8 and connected port# - where is this fibre cable connected to.




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Nuno Rocha, Employee

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Hi Pionio, your configuration looks ok, check the other end also, looks like the interface is either blocking or not coming up.
What do you do after to regain connectivity?
Do you have Spanning tree enabled?
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Pionio

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Hello

Sorry for giving poor details about this issue.

Our X450 works well with initial configuration. First installation was wiring of cables and power on switch.

For two days we have had issues with out fiber optic (port 51) and was solved disconnecting fiber optic in port 51, connecting and rebooting X450.

Spaning tree config: 

configure mstp revision 3
configure stpd s0 delete vlan default ports all
disable stpd s0 auto-bind vlan default
disable stpd s0
configure stpd s0 mode mstp cist
enable s0 auto-bind vlan 1-4094
configure s0 ports auto-edge on 1-52
enable stpd s0

Thanks
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Karthik Mohandoss, Employee

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Hi Pionio,

Were you able to get console access to the switch during the issue and is it possible to run any commands in the CLI during issue ?

If Console access is possible during the issue the port status needs to be checked during the issue to move further, in case if you are not even getting console access please raise a ticket with GTAC
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Pionio

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Hello

I can access to port console and run any commands. Port status shows nothing strange.

Instead of rebooting switch I delete port in vlan net and then readded and network connection is established.

configure vlan net del ports 51
configure vlan net add ports 51 untagged

Additional test: When all is ok, disconnect cable, reconnect and no issues in network connection.

In short:

- Lost network connection -- > disconnet cable - reconnet cable --> nothing
- Lost network connection --> reboot --> OK
- Network connection --> disconnect cable --> OK

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John Romero

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I have found that if you don't  have an active port on that vlan, it will not come up. I have created loopbacks to ensure my mgmt. vlan is always.up.
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Pionio

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Hello John

I have no issues with Mgmt.

Our X450-G2 works perfect and suddenly the users disconnect from network. I connect to switch, ping to another IP from network and shows no connectivity.

Execute this commands:

configure vlan net del ports 51
configure vlan net add ports 51 untagged

And voilá, network connection established

Thanks
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Karthik Mohandoss, Employee

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Hi Pionio,

The issue looks strange, i would suggest to open up a ticket with GTAC.