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k6ccc
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Pauses on switch to switch link

Mon Nov 28, 2022 10:27 pm

This is exclusively a SwitchOS discussion - none of the affected traffic is passing through a router.
I am getting a lot of pauses in one direction only on a link between two of my switches. One end of the link is a CSS106-5G-1S and the other is a CSS326-24G-2S+. Both are running SwitchOS 2.13. The connection between them is about 20 meters of Cat-5e cable in conduit. On the CSS326, the link is plugged into SFP-1 which is a FINISAR CORP. FTLF-TP2BCL-PR and on the CSS106 the link plugs into a SOURCEPHOTONICS SPGBTXCNFMRAD SFP. The link is running at 1Gb/s. The CSS106 (Attic switch) is reporting TX pauses, and the CSS326 (Family room switch) is reporting RX pauses.
The link is a VLAN trunk with 17 VLANs (although most of those have little or no traffic most of the time). When I am noticing the problem the vast majority of the traffic is either from the Show PC through the switches to the Lighting controllers (about 20-25 Mb/s) or from the cameras connected to the Lorex POE switch to the Lorex NVR (about 15 Mb/s). Both of those are unidirectional UDP traffic. I run a music synchronized Christmas Light show and was noticing data dropouts on the lighting display. When investigating that, is when I discovered these pauses. This is a similar arrangement to what I have done before for many years with one exception. The Lorex NVR and cameras are new earlier this year.

Any ideas?

Here is a simple drawing. If your browser does not show the image, there is a direct link to it.
Image
http://extraphotos.info/mikrotik/Attic_link_pauses.png

Link status page for the Attic switch:
Image
http://extraphotos.info/mikrotik/Attic_ ... 06link.png

Link status page (extract) for the Family room switch:
Image
http://extraphotos.info/mikrotik/Attic_ ... 6-link.png
 
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chechito
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Re: Pauses on switch to switch link  [SOLVED]

Tue Nov 29, 2022 12:34 am

try disabling flow control on both switch
 
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k6ccc
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Re: Pauses on switch to switch link

Tue Nov 29, 2022 1:02 am

Yea, I saw that while writing the post...
I'll know in a couple hours when the light show starts...
Thanks
 
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k6ccc
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Re: Pauses on switch to switch link

Tue Nov 29, 2022 5:37 pm

Light show ran fine last night, and no pauses reported by either switch.

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