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Author Topic: RSTP blocking  (Read 2127 times)

Marty

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RSTP blocking
« on: May 03, 2018, 05:57:57 AM »

Hi, hoping someone might give me some guidance on setting up three DGS 1210s in a ring configuration using RSTP. 

RSTP is enabled on all three switches.
4 vlans are setup on ports 1-24 and tagged on 27 and 28.
Asymmetric VLAN is disabled
The 3 switches are interconnected on ports 27 and 28 in a ring so each switch connects to the other two.
The root switch Bridge Priority is set to 16384 to assure root election.
All other settings are default.

Issue - After a week of running both ports 27 and 28 on the root switch will go into blocking mode and disable the connection to the other two switches.  I could very well have missed something but my searches haven't turned up anything.

Thanks
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Gattsu

  • Technical Engineer
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  • Posts: 139
Re: RSTP blocking
« Reply #1 on: May 03, 2018, 09:41:18 AM »

It should not be doing that unless there is a new root bridge..
What is the model name and firmware version for all 3 switches?

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Marty

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  • Posts: 5
Re: RSTP blocking
« Reply #2 on: May 03, 2018, 10:55:42 AM »

DES-1210-28P
Firmware 4.12.016
Hardware Ver C2

All three are the same with the same configuration minus the priority setting.

Thanks,
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Marty

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  • Posts: 5
Re: RSTP blocking
« Reply #3 on: May 03, 2018, 11:14:37 AM »

Looks like I put this in the wrong section.  It should be in the DES not DGS.  Mabye a mod can move it?

Thanks,
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Gattsu

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  • Posts: 139
Re: RSTP blocking
« Reply #4 on: May 03, 2018, 12:59:31 PM »

Are you seeing any TX/RX errors on ports 27-28?
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Gattsu

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  • Posts: 139
Re: RSTP blocking
« Reply #5 on: May 04, 2018, 07:39:20 AM »

We will attempt to replicate this issue and report back with results. If possible, please copy me the configuration file.
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Marty

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  • Posts: 5
Re: RSTP blocking
« Reply #6 on: May 09, 2018, 10:38:01 AM »

Gattsu,

I haven't had a chance to turn RSTP back on since the switches are at a remote site and in production.  The TX / RX under port statistics show 1 RX error out of 10s of thousands but I'm not certain if the log retains data after it was rebooted.  I don't see a way to attach a file here in the post reply section.  I'll see if I can message it.

Thanks,
Marty

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Gattsu

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  • Posts: 139
Re: RSTP blocking
« Reply #7 on: May 10, 2018, 07:42:31 AM »

Okay, I'll private message you my email and a link to a beta firmware to test. The beta contains the latest fixes, I suggest updating to that and re-testing.

Where do you see the status "blocking"? From the GUI or CLI?
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Gattsu

  • Technical Engineer
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  • Posts: 139
Re: RSTP blocking
« Reply #8 on: May 25, 2018, 07:12:43 AM »

So far with your configuration and network topology, we have not been able to replicate the issue.

If you have not already try updating the firmware to a beta code, which contains the latest fixes.

https://www.dropbox.com/s/luo5mzjo8cmr77m/DES-1210-28P-C2-4-12-B044%280509145949%29.zip?dl=0
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