Route summarization for BGP in Azure

Question

Is there a way to summarize subnets when sending routes from Azure to on-prem or other CSPs, or does Azure send every single subnet?

Answer 1

@ares ,

Welcome to the Microsoft Q&A Platform. Thank you for reaching out & I hope you are doing well.

Generally, Azure advertises the routes according to the VNET Ranges.

I am not aware of any mechanism available to summarize the advertised prefixes in ExpressRoute.

You can use Get-AzExpressRouteCircuitRouteTable , to get a list of all the routes advertised and learned.

Hope this helps.

Cheers,

Kapil