HowToFixMe
AWS Wavelength and Local Zones

How to route Wavelength traffic only over carrier 5G network

By Sai Kiran Pandrala · Last verified: 2026-05-31 · Source: AWS re:Post, community Q&A, AWS docs

At a glance
ServiceAWS Wavelength and Local Zones
CloudAmazon Web Services (AWS)
Guide typeProcedure
Skill levelIntermediate to advanced
Time15 - 60 minutes depending on account size

Engineers running AWS Wavelength and Local Zones hit How to route Wavelength traffic only over carrier 5G network often enough that there is a stable fix pattern. This page captures it in the order AWS support would run it during a real incident.

What how to route wavelength traffic only over carrier 5g network actually involves on AWS Wavelength and Local Zones

Real-world context. Cost envelope: ~Rs 0 INR for the fix itself, support plan adds Rs 2,500 to Rs 1,00,000 INR per month (around $30 to $1,200 USD/month). Time at the keyboard: ~15 to 45 minutes. Time end-to-end including verification: ~1 to 4 hours including IAM review and post-fix validation. Have an admin IAM role, the AWS CLI v2, and a CloudTrail filter pointed at the affected resource staged before the first command so you do not stall on missing inputs.

This task on Wavelength + Local Zones is one of the more searched operational topics on AWS in the last 12 months. The procedure below is the path that works in a current AWS account with default IAM and standard VPC config.

The rest of this page is the structured fix path. Start with diagnose, then remediation, then the automation options so you do not have to do this by hand the next time it surfaces. Verify and safety sections at the end are the discipline that keeps the fix from regressing in production.

What you'll see

Look at the CloudTrail event for the failed call, even if you are not enrolled in CloudTrail Lake. The basic 90-day event history works for most diagnostic purposes and lives in the console under CloudTrail > Event history. Filter by event name (the API action) and time range; the event JSON shows the exact user identity, source IP, request parameters, and error code.

Check the AWS Health Dashboard at health.aws.amazon.com for ongoing service events in your region. About one in ten user-reported outages turn out to be region-scoped AWS service degradation already being tracked. AWS Health also exposes an API and EventBridge events, so you can wire a Lambda hook that pages on-call only when the failure correlates with an active AWS Health event in the same region and service.

Reproduce the failure with the AWS CLI in --debug mode. The full SigV4 request payload it emits, plus the exact endpoint URL it resolved to, is what AWS Support uses to verify policy, region, or parameter issues without you having to share IAM credentials. Save the debug output to a file with aws ... --debug 2> debug.log and you can search it for the failed aws.request entry.

Solution-focused remediation path

If the issue points at IAM, do not start by adding * to a policy. Use IAM Access Analyzer (Policy Generator) against the failed action to see the minimum scope. Adding * is the fastest way to fail your next AWS Well-Architected security review, and it usually does not even fix the issue because the explicit deny is often coming from a higher level (SCP, RCP, or permission boundary), not a missing allow.

Most AWS Wavelength and Local Zones failures fall into one of three buckets: IAM permission gap, networking path break (security group, NACL, or VPC endpoint policy), or service-limit / quota hit. Run that mental triage first - it covers around 80 percent of real-world cases. If the failure does not fit any of the three, it is likely a service-side regression worth opening a re:Post or support ticket for.

If you cannot reproduce the failure consistently, the cause is probably a race condition or a session-cache issue. Run the call with --profile set to a fresh STS session, in a different region you control, with a single concurrent request. If it works there but fails in your normal setup, the difference is the bug.

Automate this fix so you do not do it twice

Automate the fix with Python and boto3

For anything you do more than twice, write a small Python script. The boto3 pattern below uses paginators (so it does not blow up on accounts with thousands of resources), explicit region binding, and a dry-run flag that defaults to True. Keep the script under 100 lines; if it grows beyond that, you are building a tool and should put it behind a Lambda with proper logging.

import boto3, sys
DRY_RUN = '--apply' not in sys.argv
client = boto3.client('wavelength', region_name='us-east-1')
paginator = client.get_paginator('describe_...')
for page in paginator.paginate(): for item in page.get('Items', []): if item.get('Status') == 'FAILED': if DRY_RUN: print(f'[dry-run] would fix {item["Id"]}') else: client.modify_...(ResourceId=item['Id']) print(f'fixed {item["Id"]}')

Automate the fix with the AWS CLI

The CLI one-liner pattern for AWS Wavelength and Local Zones operations is roughly: aws wavelength describe-... --query ... to read state, aws wavelength modify-... --no-dry-run to apply the change, and aws wavelength describe-... --query ... again to verify. Wrap it in a shell script that sets a region variable at the top and exits on first error with set -euo pipefail so a partial run does not leave the account in a half-fixed state.

# Template - replace placeholders with your account specifics
export AWS_REGION=us-east-1
export AWS_PROFILE=prod
aws wavelength describe-... --query 'Resources[?Status==`FAILED`].[Id,Reason]' --output table
aws wavelength modify-... --resource-id RESOURCE_ID --no-dry-run
aws wavelength describe-... --resource-id RESOURCE_ID --query 'Status'

Add a CloudWatch alarm so you know next time

The cheapest way to never see the same incident twice is a CloudWatch alarm on the metric that would have warned you. For AWS Wavelength and Local Zones, the relevant metrics live under AWS/wavelength namespace or under custom metrics published by your Lambda or ECS task. Set thresholds based on observed normal range plus one or two standard deviations, not on round-number guesses. CloudWatch anomaly-detection alarms remove the threshold-guessing problem entirely for metrics with regular seasonality.

Common traps

The pitfall most teams hit on AWS Wavelength and Local Zones is moving too fast and skipping the read-only validation step. Before any write, list the current state and save it. AWS APIs are eventually consistent for many resource types, so the validation snapshot is your only reliable reference if you need to undo. Save the output of the describe call to S3, not to your laptop.

Second pitfall: confusing IAM permission errors with networking errors. AccessDenied can be IAM (policy missing), networking (VPC endpoint policy blocking the call), or KMS (key policy missing). The error string looks identical for all three. Distinguish by looking at the CloudTrail event's errorCode and the encoded authorization message; do not assume IAM is the culprit just because the message says AccessDenied.

The repair

Safety, rollback, blast radius

FAQ

How long does how to route wavelength traffic only over carrier 5g network typically take on AWS?
For most AWS Wavelength and Local Zones environments, 15 to 60 minutes including verification. Large multi-account setups, anything touching SCPs at the Organizations level, or cross-region replication can stretch to half a day because AWS has to wait for replication and IAM session caches.
Is there a rollback path?
Yes for most AWS Wavelength and Local Zones changes. Export the existing config to JSON via aws wavelength describe-... first, then commit it before you change anything. A few operations are one-way (KMS key deletion past the pending window, region migration, account closure). Check the AWS doc for the specific API before you commit.
Will this affect dependent AWS services?
Often yes. AWS Wavelength and Local Zones resources are usually referenced by other workloads (Lambda, ECS tasks, IAM-bound apps, CloudFront origins, downstream pipelines). Use IAM Access Analyzer + CloudTrail to enumerate consumers before changing a shared resource.
What if my AWS Console layout does not match these steps?
AWS Console UI moves quarterly. The Console layout in this page is current as of 2026-05-31 but the underlying CLI / SDK calls do not change as fast. If the Console version differs, fall back to aws CLI or SDK calls - those almost always still work.
Where do I get AWS Support help if I am still stuck?
Open a case via the AWS Support Center with: the request ID + correlation ID, the exact error string, CloudTrail event, and your reproduction steps. AWS re:Post is the no-cost public alternative - search there first; 80% of common AWS Wavelength and Local Zones issues already have an answer with an AWS-staff-verified flag.

References

Related guides worth a look while you sort this one out: