Azure ExpressRoute gateway advertises a maximum of 1,000 IPv4 prefixes to on-premises networks

cloud · Aug 21, 2026 · 12 min read

Azure's 1,000-prefix ExpressRoute ceiling: summarizedGatewayPrefixes replaces the hub VNet prefix

Azure's ExpressRoute gateway advertises at most 1,000 IPv4 prefixes to on-premises and Premium does not lift it. summarizedGatewayPrefixes substitutes prefixes rather than adding them.

Manu Shukla

#Azure #expressroute #networking

AWS Direct Connect inbound prefix limits compared with Azure ExpressRoute route caps in 2026

AI & Cloud Infrastructure · Aug 21, 2026 · 13 min read

Direct Connect prefix limit rose to 1,000 on 20 August 2026 - your VIFs still default to 100

On 20 August 2026 AWS lifted Direct Connect inbound prefixes from 100 to 1,000 per virtual interface. Azure ExpressRoute answers the same scale problem the opposite way, and the two ceilings do not line up.

Manu Shukla

#aws-direct-connect #azure-expressroute #bgp