On Tue, Dec 07, 2021 at 10:22:37PM +0000, Andrew Hearn via Exim-users wrote: > We have a direct interconnect to Google, so there is only a fibre > between our router and Google's router, that part of path is stable and > identical - though there are a number of hops withing Google's AS that > could be changing. > > ping/mtr - no packet loss
Expected in case of broken PMTUD, and in this case mtr is helpful for monitoring path, not loss value (wich may be zero). > Tried reducing MTU (can't pmtu discover to gmail as they block too much > ICMP) - no difference > > Checked IPv4 vs IPv6 - no difference You were suggested to record traffic dump. Look for disconnections and extract regions from 2-3 last server's ACKs to client's RST. -- Eugene Berdnikov -- ## List details at https://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
