Quite straightforward feature, update the prefixes until they are installed in hardware
- Obviously, this prevents packet loss. Without this feature, routers start to advertise prefixes when hardware forwarding not ready yet. When its peers start to flood traffic to it, the only thing it can do is to drop them.
- Very useful when working with MLAG, which requires the routers to put Mlag downstream interface to hold state during initialization.
"update wait-for-convergence"
- https://aristaeos.blogspot.com/2018/03/arista-eos-bgp-update-wait-for.html
- This is a feature for spine routers. The key point behind it is, don't advertise prefixes until fully convergence (which means you have full routing info).
Where to use them:
- On MLAG or L2/L3 boundary, ONLY use wait-for-install
- On spine, use both
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