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John2k
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Posts: 7
Joined: Thu Feb 28, 2019 6:34 pm

Time-out issue

Mon Jun 21, 2021 10:53 pm

Hi

I have a site that has 4 switches with DAC cables uplinked between them.
  • SW1 to SW2
    SW2 to SW3
    SW3 to SW4
    SW4 to SW1
Switches models below:
  • SW1: CRS328-24P-4S+
    SW2: CRS328-24P-4S+
    SW3: CRS317-1G-16S+RM
    SW4: CRS317-1G-16S+RM
They are running swOS mode, no configuration. Just basic setup
  • Set the switch to static IP
    Set the new admin password
    Rename the switch name

The issue:

The original issue was the SW2 was getting too many time-outs, it was causing other switches to have some time-out too. We removed the SW2 all three switches came back normal.

We replaced the SW2 with a new one, but now the SW3 is having some time-outs, but it is not affecting other switches to have the same issue (like SW2 before). It is just SW3 has time-outs. We found out if we disconnect any uplink cable SW2 to SW3 or SW3 to SW4, leaving only one uplink on SW3 the time-outs stop.

We did the following steps below and none of them can stop the time-out, except removing one uplink cable.
  • We have replaced the DAC cable
    Swapped the DAC cable with new one
    Changed to a different fiber port on any of the switches

Do I need to configure something on the uplink ports?

Any help will be very appreciated, thanks.

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