Going to delay this for now. We have enough disruptive changes planned not to burden wider SRE with this one in the next few weeks.

We do have some SPINE->LEAF->SPINE traffic right now which is *not* good, however it's all on 100G links via empty or almost-empty LEAF devices. As we move servers from asw to lsw the traffic pattern disappears also, as the LEAF will select the correct SPINE (connected to VRRP active CR for the vlan).

At that point the only downside is traffic going LEAF->SPINE->CR>SPINE->LEAF for intra-subnet traffic (similar to it's always been on ASW with CR as gateway). Moving the gateway to anycast on the LEAF devices would turn this to LEAF->SPINE->LEAF or turn-around within a leaf if local. So much better. But we can review once servers are moved and based on how long moving hosts from row-wide to rack-specific vlans is taking whether it's worth it. If we manage to re-ip some of the more "fragile" hosts the gateway move might be easier to execute given the interruption will only be short.