asr-network-mapping

name	asr-network-mapping
description	ASR network mapping — IP retention, DNS cutover, NSG/UDR re-attachment

Asr Network Mapping

When to use this skill

• DR network plan
• First-time ASR setup

Key concepts

• Map source VNet/subnet to target VNet/subnet pre-failover.
• Static IPs can be retained (with target subnet same CIDR) or remapped — decide and document.
• Public IPs are not replicated — assign in recovery plan post-failover.
• NSGs and UDRs attach in target by mapping; verify they exist in target region.
• DNS cutover is the linchpin — Private DNS Zone link to target VNet, TTL tuning, automation in recovery plan.

Common pitfalls

• Forgetting Public IPs aren't replicated — users hit dead addresses post-failover.
• Mismatched NSGs in target region (forgotten new rule in source).
• DNS TTL too high — users still resolve old IP during cutover window.

References

• Microsoft Learn: search for "Asr Network Mapping Azure VM" on https://learn.microsoft.com

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