Wednesday, October 20, 2021

What was your first experience with asynchronous routing?

We are a smaller shop, that is growing a bit and I've had to introduce multiple routers, etc and I just experienced my first asynchronous routing problem. Pre-production luckily, but still!

PING worked so my brain was broken for about 30 minutes, but nothing else would. SSH, SMB, etc.

I thought the traffic was simply just not getting there, until I opened up wireshark on the destination server and saw a lot of TCP re-transmit errrors, etc.

PING obv worked because it's stateless, but anything TCP based (SSH, SMB, etc) did not because the sequences were all WAY out of order.



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