Routing domain on ExpressRoute that reaches public endpoints of Azure PaaS and Microsoft 365 using public IP prefixes you own. Circuits created since August 2017 advertise nothing until you attach a route filter.
Read more: Microsoft Learn
In the Ultra Transcenders books
Each book explains Microsoft peering in context, with comparison tables and the common traps.
Terms in this definition
- Geographic
A Traffic Manager routing method that picks the endpoint according to where the user is located geographically.
- Domain
A way of grouping workspaces by area of the business, in support of a data mesh approach. Items take on their workspace's domain, letting you filter the OneLake catalog by it, and certain tenant settings can be passed to domain admins; domains have no effect on access permissions.
- ExpressRoute
A dedicated private link between on-premises networks and Azure, using Microsoft peering or private peering.
- PaaS
Platform as a service, managed offerings such as Azure SQL Database and App Service in which the provider looks after the infrastructure and operating system.
- Microsoft 365
Formerly Office 365, Microsoft's software-as-a-service productivity suite. A Microsoft Entra tenant provides its identity, and its data is not governed by Azure RBAC.
- Route filter
Resource applied to ExpressRoute Microsoft peering that permits selected BGP community values, so prefixes are advertised only for the services you choose.
Related terms
- Azure public peering
Older ExpressRoute peering for reaching Azure's public endpoints; it is deprecated for new circuits, with Microsoft peering in its place.
- Default route
The 0.0.0.0/0 route matching any destination. Advertised by on-premises routers through BGP on ExpressRoute private peering (Microsoft peering won't do), it sends internet traffic from connected VNets back on-premises.
- DMZ
A firewalled buffer network on premises that sits between the outside world and the core network. Microsoft Learn suggests ending ExpressRoute Microsoft peering there, while private peering lands on the core.