05-10-2023 06:44 PM
SDWAN.1 is Xfinity comcast no issue ( cable modem 500 down 30 up)
SDWAN PROFILE. set to ethernet even though it is a cable modem circuit with an ethernet handoff
SDWAN.1 TIER 1 ISP. Bouncing every few minutes based on SDWAN probing.
Tried AGGRESSIVE vs RELAXED
Tried ETHERNET vs Fiber link.
The Tier1 carrier and I have verified evrything with the circuit and see no issues.
MTR on the TIER1 network of course limits icmp so observed packet loss is not relevant since it is at only 1 hop where the policers are applied
Maybe there is a better way or something I am missing for SDWAN circuit health
05-12-2023 08:36 AM
Look for TCP retransmissions in pcaps as windows ramp up during transmits. Might be a MTU issue. set your MTU down to low 1430 to test if currently at 1500.
05-12-2023 01:13 PM
this is a Direct Internet Access / ISP circuit not a tunnel
05-15-2023 04:26 AM
If the underlay is the issue and not the overlay SDWAN interfaces, I would look for layer 2 channel issues or seek help from Comcast support to remediate a MAC ghosting issue.
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