Single service comparison

Huawei Cloud Enterprise Router (ER) is the closest analog: a regional router that attaches VPCs, VPN gateways, and Direct Connect virtual gateways and learns routes via BGP, with route tables, propagation, and association concepts mirroring Transit Gateway's model. Both support cross-account sharing and active/standby or load-balanced links. However, ER's attachment set is narrower (VPC, VPN, VGW) and its inter-region model relies on Cloud Connect peering rather than Transit Gateway's inter-region peering, so topology equivalence is not automatic across regions.

Scaling and HA boundaries differ. AWS Transit Gateway is regional, multi-AZ, and supports thousands of attachments per gateway with per-attachment appliance mode and multicast options. Huawei ER advertises over 2,000 routes per router and multi-link load balancing, but publicly documented quota and availability-domain details are less granular. Appliance mode, route table associations on VPN, and IGMP multicast present on AWS have no confirmed ER equivalent; assess each before assuming parity.

Integration and operational responsibility diverge. ER integrates natively with Cloud Connect (cross-region), Direct Connect, VPN, and Cloud Firewall/ third-party firewall traffic diversion; AWS integrates with Network Manager, CloudWatch, and flow logs. ER does not expose an equivalent centralized topology/SD-WAN management plane, so observability, event, and flow-log tooling must be rebuilt with Cloud Eye, CTS, and VPC flow logs, and operational runbooks should not assume Terraform/CloudFormation module parity.

Start with an assessment: inventory every Transit Gateway attachment (VPC, VPN, Direct Connect gateway, peering), route tables, propagation settings, association order, and policies. Map each to the ER equivalent (VPC attachment, VPN gateway, VGW attachment) and flag unsupported constructs such as appliance mode, multicast, or inter-region peering, planning Cloud Connect or VPC peering as substitutes. Document quota gaps and per-region availability before committing to a like-for-like design.

Rebuild the target in Huawei Cloud incrementally: create the Enterprise Router, attach VPCs (with ER-recommended / to-be-defined subnet handling), create VPN gateways and Direct Connect VGWs, configure route tables with matching propagation and blackhole/association behavior. Reproduce policy and failover ordering using ER's BGP communities and AS path where supported, and validate that cross-account sharing via RMS/RAM-equivalent covers the AWS RAM shares you depend on. There is no automated one-click import; route and attachment configuration is re-authored in IaC or console.

Validate and cut over in phases. Mirror a non-production Transit Gateway in ER, run side-by-side traffic, verify BGP convergence, failover switchover timing, and route propagation against AWS baselines, then migrate workload spokes one VPC at a time. Confirm Cloud Eye, CTS, and VPC flow logs replace CloudWatch/flow log alerting, and that security-group and firewall-integration (Cloud Firewall or third-party) traffic diversion matches the AWS inspection pattern before final cutover.

Mind the cost and gap deltas. AWS bills per attachment-hour plus data processed; Huawei bills ER instance-hours and may involve separate VPC peering, VPN bandwidth, and Direct Connect port charges, so recompute TCO with peak traffic and retention. Reserve Cloud Connect for cross-region needs ER cannot serve natively, and explicitly document unsupported Transit Gateway features (multicast, appliance mode, inter-region peering, Network Manager) as architectural risks requiring compensating controls before production.