04-01-2020 07:47 AM
I've got a strange delay issue on one of our L3 switches used as a DISTRO. Distro 2 doesn't show these issues, but 1 does.
Using a continuous ping from Distro1 out to devices in each VLAN I get one dropped packet after about 20-21 good ones. Distro2 doesn't exhibit this.
When I ping from the devices back to the Distro I don't see dropped packets, but I see latency in a regular pattern. All pings would complete in 1ms except the one that takes 4-5ms. See pattern below.
I've searched for routing loops, but don't see any. What else would cause this behavior?
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04-01-2020 08:13 AM
Hi
To me it looks like drops show a pattern .. ie. drop is always after certain replies.
are there any port-channels? looks like port-channel issue to me ..
04-01-2020 08:35 AM
Yes, this is a standard collapsed core with two L3 switches connected to nine access switches and a TB out to the WAN. There is a 2GIG port channel between L3 devices. What port-channel issues cause this? I really haven't heard of problems like this.
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