You are correct, the problem started only after placing new Arista border routers. The previous border routers were not doing ECMP. The issue was a combination of the use of anycast, diverse Internet transit egress,…
The Arista units are 7504N which are running 4.20 or later, and I believe they use the Arad or Petra chpiset.
To clarify, the Arista routers are the ISP's border routers. It was the residential/business customers' SOHO routers, of various makes and models, that were not decrementing the initial TCP SYN.
You are correct, the problem started only after placing new Arista border routers. The previous border routers were not doing ECMP. The issue was a combination of the use of anycast, diverse Internet transit egress,…
The Arista units are 7504N which are running 4.20 or later, and I believe they use the Arad or Petra chpiset.
To clarify, the Arista routers are the ISP's border routers. It was the residential/business customers' SOHO routers, of various makes and models, that were not decrementing the initial TCP SYN.