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Beginner

Unable to access a switch after reboot

The problem occurs after rebooting the switch. The switch comes back up, but I am not able to ping the switch or telnet to the switch.

When connecting directly into the console of the switch, the switch is not able to ping out. Shutting down the vlan with the management IP and turning it back on brings the switch back online and I am able to ping and telnet. It is happening every time after the switch gets rebooted. I have to physically connect to the switch to bring it back online. 

 

The switch is 3850 and I just upgraded it to 16.6.5. It seems like the problem started on the new version.

1 ACCEPTED SOLUTION

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Hall of Fame Guru

Re: Unable to access a switch after reboot


@yuli7641 wrote:

The switch is 3850 and I just upgraded it to 16.6.5. It seems like the problem started on the new version.


CSCvo59504

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6 REPLIES 6
Rising star

Re: Unable to access a switch after reboot

 - Are you sure there is a functional startup configuration or does it perhaps contain errors ?

 M.

Beginner

Re: Unable to access a switch after reboot

It is a fully functional configuration on a production switch. I didn't have any issues on 3.6.8E, now after I upgraded it to 16.6.5  I am having this issue. 

 

VIP Advisor

Re: Unable to access a switch after reboot

how is your network management interface connected. do you have any topology and share the configuration ?

 

what is the errors before you shut and shutdown the interface ?

 

after reboot can you post below output

 

show ip interface brief 

BB
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Beginner

Re: Unable to access a switch after reboot

No errors. Nothing that indicates any problem. The management IP is configured on the data vlan. The switch is connected with a trunk port to the core. 

 

show ip int br was showing UP UP for that vlan

 

Interface IP-Address OK? Method Status Protocol
Vlan207 10.x.x.x YES NVRAM up up

Hall of Fame Guru

Re: Unable to access a switch after reboot


@yuli7641 wrote:

The switch is 3850 and I just upgraded it to 16.6.5. It seems like the problem started on the new version.


CSCvo59504

Everyone's tags (1)
Beginner

Re: Unable to access a switch after reboot

Thanks, Leo this is very helpful. I will upgrade to 16.6.6 and hope it resolves the issue. We have several switches 16.6.5 that are affected by this.
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