Agent skill

azure-expressroute

Expert knowledge for Azure ExpressRoute development including troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. Use when designing ExpressRoute circuits/gateways, BGP routing, Global Reach, FastPath, or S2S VPN coexistence, and other Azure ExpressRoute related development tasks. Not for Azure Internet Peering (use azure-internet-peering), Azure Peering Service (use azure-peering-service), Azure Virtual WAN (use azure-virtual-wan), Azure VPN Gateway (use azure-vpn-gateway).

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npx add-skill https://github.com/MicrosoftDocs/Agent-Skills/tree/main/skills/azure-expressroute

Metadata

Additional technical details for this skill

generator
docs2skills/1.0.0
generated at
2026-04-05

SKILL.md

Azure ExpressRoute Skill

This skill provides expert guidance for Azure ExpressRoute. Covers troubleshooting, best practices, decision making, architecture & design patterns, limits & quotas, security, configuration, integrations & coding patterns, and deployment. It combines local quick-reference content with remote documentation fetching capabilities.

How to Use This Skill

IMPORTANT for Agent: Use the Category Index below to locate relevant sections. For categories with line ranges (e.g., L35-L120), use read_file with the specified lines. For categories with file links (e.g., [security.md](security.md)), use read_file on the linked reference file

IMPORTANT for Agent: If metadata.generated_at is more than 3 months old, suggest the user pull the latest version from the repository. If mcp_microsoftdocs tools are not available, suggest the user install it: Installation Guide

This skill requires network access to fetch documentation content:

  • Preferred: Use mcp_microsoftdocs:microsoft_docs_fetch with query string from=learn-agent-skill. Returns Markdown.
  • Fallback: Use fetch_webpage with query string from=learn-agent-skill&accept=text/markdown. Returns Markdown.

Category Index

Category Lines Description
Troubleshooting L37-L43 Troubleshooting ExpressRoute resiliency and asymmetric routing issues, plus FAQs on connectivity models, supported services, bandwidth, and pricing to resolve design or outage-related questions.
Best Practices L44-L51 Best practices for ExpressRoute: upgrading circuit bandwidth, using BGP communities in complex topologies, QoS for Skype voice, and migrating to new gateway hardware.
Decision Making L52-L61 Guidance on choosing ExpressRoute connectivity models, VNets/gateways/SKUs, mapping providers to peering locations, and planning/migrating while managing ExpressRoute costs
Architecture & Design Patterns L62-L72 Designing resilient, highly available ExpressRoute topologies, multi-circuit routing, coexistence with S2S VPN, DR/backup patterns, and using Microsoft peering for PSTN services.
Limits & Quotas L73-L80 ExpressRoute bandwidth, route, and gateway limits, FastPath constraints, rate limiting on provider circuits, and how to monitor advertised routes to stay within quotas
Security L81-L90 Encryption (IPsec, MACsec), NAT rules, RBAC roles, and security best practices for protecting ExpressRoute circuits and traffic
Configuration L91-L127 How to configure and manage ExpressRoute circuits, peerings, VNets, gateways, routing/BGP, NAT, IPv6, monitoring, resiliency, and Global Reach using portal, PowerShell, and CLI
Integrations & Coding Patterns L128-L134 Automating ExpressRoute circuit creation/management with PowerShell or Azure CLI, and configuring a site-to-site VPN that runs over ExpressRoute Microsoft peering.
Deployment L135-L141 Guides for deploying and migrating ExpressRoute circuits/gateways, understanding Direct SKUs, testing multi-site resiliency, and automating setup with ARM templates, PowerShell, and Terraform.

Troubleshooting

Topic URL
Test and validate resiliency of redundant ExpressRoute circuits https://learn.microsoft.com/en-us/azure/expressroute/evaluate-circuit-resiliency
Diagnose and resolve asymmetric routing with ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/expressroute-asymmetric-routing
Azure ExpressRoute FAQ for services, costs, and connectivity https://learn.microsoft.com/en-us/azure/expressroute/expressroute-faqs

Best Practices

Topic URL
Apply best practices for upgrading ExpressRoute circuit bandwidth https://learn.microsoft.com/en-us/azure/expressroute/about-upgrade-circuit-bandwidth
Manage complex ExpressRoute networks using BGP communities https://learn.microsoft.com/en-us/azure/expressroute/bgp-communities
Apply QoS requirements for Skype voice over ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/expressroute-qos
Migrate legacy ExpressRoute gateway connections to new hardware https://learn.microsoft.com/en-us/azure/expressroute/howto-recreate-connections

Decision Making

Topic URL
Select and plan ExpressRoute virtual network gateways https://learn.microsoft.com/en-us/azure/expressroute/expressroute-about-virtual-network-gateways
Choose the right Azure ExpressRoute connectivity model https://learn.microsoft.com/en-us/azure/expressroute/expressroute-connectivity-models
Map ExpressRoute connectivity providers to peering locations https://learn.microsoft.com/en-us/azure/expressroute/expressroute-locations
Plan and execute ExpressRoute gateway SKU migration https://learn.microsoft.com/en-us/azure/expressroute/gateway-migration
Plan and manage Azure ExpressRoute costs https://learn.microsoft.com/en-us/azure/expressroute/plan-manage-cost
Choose VNet connectivity options over ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/virtual-network-connectivity-guidance

Architecture & Design Patterns

Topic URL
Design resilient Azure ExpressRoute network architectures https://learn.microsoft.com/en-us/azure/expressroute/design-architecture-for-resiliency
Design disaster recovery with ExpressRoute private peering https://learn.microsoft.com/en-us/azure/expressroute/designing-for-disaster-recovery-with-expressroute-privatepeering
Architect high availability for Azure ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/designing-for-high-availability-with-expressroute
Optimize routing across multiple ExpressRoute circuits https://learn.microsoft.com/en-us/azure/expressroute/expressroute-optimize-routing
Architect coexisting ExpressRoute and S2S VPN connections https://learn.microsoft.com/en-us/azure/expressroute/how-to-configure-coexisting-gateway-portal
Design S2S VPN backup for ExpressRoute private peering https://learn.microsoft.com/en-us/azure/expressroute/use-s2s-vpn-as-backup-for-expressroute-privatepeering
Use ExpressRoute Microsoft peering for PSTN services https://learn.microsoft.com/en-us/azure/expressroute/using-expressroute-for-microsoft-pstn

Limits & Quotas

Topic URL
Evaluate ExpressRoute FastPath features and limits https://learn.microsoft.com/en-us/azure/expressroute/about-fastpath
Monitor ExpressRoute advertised routes to avoid limits https://learn.microsoft.com/en-us/azure/expressroute/how-to-custom-route-alert
Understand rate limiting on provider-based ExpressRoute circuits https://learn.microsoft.com/en-us/azure/expressroute/provider-rate-limit
ExpressRoute scalable gateway features and limits https://learn.microsoft.com/en-us/azure/expressroute/scalable-gateway

Security

Topic URL
Use encryption options with Azure ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/expressroute-about-encryption
Configure IPsec transport mode over ExpressRoute for Windows https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-ipsec-transport-private-windows
Configure MACsec security for Azure ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-macsec
Apply NAT requirements for Azure ExpressRoute circuits https://learn.microsoft.com/en-us/azure/expressroute/expressroute-nat
Roles and permissions for ExpressRoute resources https://learn.microsoft.com/en-us/azure/expressroute/roles-permissions
Apply security best practices to Azure ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/secure-expressroute

Configuration

Topic URL
Establish private ExpressRoute peering to an Azure VNet https://learn.microsoft.com/en-us/azure/expressroute/configure-expressroute-private-peering
Configure customer-controlled maintenance windows for ExpressRoute gateways https://learn.microsoft.com/en-us/azure/expressroute/customer-controlled-gateway-maintenance
Configure BFD over Azure ExpressRoute peering https://learn.microsoft.com/en-us/azure/expressroute/expressroute-bfd
Configure NAT on Cisco and Juniper for ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/expressroute-config-samples-nat
Router interface and BGP configuration samples for ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/expressroute-config-samples-routing
Create and manage ExpressRoute virtual network gateways https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-add-gateway-portal-resource-manager
Manage ExpressRoute virtual network gateways with PowerShell https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-add-gateway-resource-manager
Add IPv6 support to ExpressRoute private peering https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-add-ipv6
Configure coexisting ExpressRoute and S2S VPN connections (classic) https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-coexist-classic
Configure coexisting ExpressRoute and S2S VPN gateways https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-coexist-resource-manager
Link VNets to ExpressRoute circuits using PowerShell https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-linkvnet-arm
Link Azure VNets to ExpressRoute circuits via CLI https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-linkvnet-cli
Link virtual networks to ExpressRoute circuits https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-linkvnet-portal-resource-manager
Link virtual networks to ExpressRoute circuits https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-linkvnet-portal-resource-manager
Reset ExpressRoute circuit peerings with PowerShell https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-reset-peering
Reset ExpressRoute circuit peerings in Azure portal https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-reset-peering-portal
Configure ExpressRoute routing and peering with PowerShell https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-routing-arm
Configure ExpressRoute circuit peering in Azure portal https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-routing-portal-resource-manager
Configure a scalable ExpressRoute gateway in portal https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-scalable-portal
Configure ExpressRoute Global Reach with PowerShell https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-set-global-reach
Configure ExpressRoute Global Reach in Azure portal https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-set-global-reach-portal
Configure routing requirements for Azure ExpressRoute circuits https://learn.microsoft.com/en-us/azure/expressroute/expressroute-routing
Configure Connection Monitor for ExpressRoute connectivity https://learn.microsoft.com/en-us/azure/expressroute/how-to-configure-connection-monitor
Configure custom BGP communities for ExpressRoute private peering https://learn.microsoft.com/en-us/azure/expressroute/how-to-configure-custom-bgp-communities
Configure custom BGP community values for ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/how-to-configure-custom-bgp-communities-portal
Configure ExpressRoute Traffic Collector and Log Analytics https://learn.microsoft.com/en-us/azure/expressroute/how-to-configure-traffic-collector
Configure Azure ExpressRoute Direct resources https://learn.microsoft.com/en-us/azure/expressroute/how-to-expressroute-direct-portal
Configure route filters for ExpressRoute Microsoft peering https://learn.microsoft.com/en-us/azure/expressroute/how-to-routefilter-portal
Configure ExpressRoute peering using Azure CLI https://learn.microsoft.com/en-us/azure/expressroute/howto-routing-cli
Use Azure Monitor metrics and logs for ExpressRoute https://learn.microsoft.com/en-us/azure/expressroute/monitor-expressroute-reference
Configure rate limiting on ExpressRoute Direct circuits https://learn.microsoft.com/en-us/azure/expressroute/rate-limit
Use Resiliency Insights for ExpressRoute gateways https://learn.microsoft.com/en-us/azure/expressroute/resiliency-insights
Validate ExpressRoute gateway resiliency and failover https://learn.microsoft.com/en-us/azure/expressroute/resiliency-validation

Integrations & Coding Patterns

Topic URL
Programmatically manage ExpressRoute circuits using Azure CLI https://learn.microsoft.com/en-us/azure/expressroute/howto-circuit-cli
Create and manage ExpressRoute circuits using Azure CLI https://learn.microsoft.com/en-us/azure/expressroute/howto-circuit-cli
Configure S2S VPN over ExpressRoute Microsoft peering https://learn.microsoft.com/en-us/azure/expressroute/site-to-site-vpn-over-microsoft-peering

Deployment

Topic URL
Migrate production workloads to a new ExpressRoute circuit https://learn.microsoft.com/en-us/azure/expressroute/circuit-migration
Understand ExpressRoute Direct SKUs and technical requirements https://learn.microsoft.com/en-us/azure/expressroute/expressroute-erdirect-about
Deploy an Azure ExpressRoute circuit via ARM template https://learn.microsoft.com/en-us/azure/expressroute/expressroute-howto-circuit-resource-manager-template
Provision ExpressRoute circuit and gateway using Terraform https://learn.microsoft.com/en-us/azure/expressroute/quickstart-create-expressroute-vnet-terraform

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