We've this ongoing issue....
Two Datacentres with two ESX Clusters separated by layer 3 routed WAN link (20 Mbps) & a layer 2 spanned VLAN (100 Mbps) for replication purposes. Each cluster has a single physical VEEAM Backup Proxy/WAN Accelerator host. These hosts have two NIC's. One physically connected to the layer 2 link, the other to the layer 3 link ( Gateway/routed ).
We have VEEAM configured for Replication link subnet preference for replication purposes & have defined the layer 3 IP net properties with throttling.
The issues are
1. Throttling occurs on the layer 2 link as well as the layer 3 link. When we remove throttling...
2. Layer 3 pipe gets absolutely HAMMERED with VEEAM traffic to the point of total congestion. Layer 2 link is utilized in a mirror capacity to that of the Layer 3 link. If it can hit 10 Mbps on L3, it does so on L2.
Essentially, Replication traffic does not stick exclusively to the layer 2 link as required. I've been at this problem for 6 months and have tried every trick in the book. The host file on each VEEAM Proxy has its partner configured via its layer 2 IP.
Every replication job when it's kicked off totally destroys our layer 3 network and seems to trickle across the layer 2 link.
Thoughts and suggestions welcome before i go postal.