L3 Network Engineer

Remote • Posted 5 hours ago • Updated 5 hours ago

Full Time

No Travel Required

Remote

Depends on Experience

Fitment

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Job Details

Skills

L3 Network

Summary

Job Title: L3 Network Engineer –

Location: Remote (US)/Dallas

Duration: Long Term

Job Description:

Role Summary (L3 Network Engineer)

L3 engineers will execute site-by-site migration cutovers, validate routing and traffic flows end-to-end, perform targeted troubleshooting, and coordinate with L4 escalation where needed. They will follow standardized Method of Procedure (MoP), maintain change logs, and provide post-cutover artifacts.

1) Scope of Work (What L3 Will Do)

Pre-Checks & Peering

Verify ICMP reachability to Adva NID and new MPLS CE/PE endpoints.
Validate empty BGP peering with the new provider (session state, timers, ASN, MD5 if used).
Verify that port 4 connectivity between FW1 and FW2 is in place and functioning.

Current State Validation

Confirm incumbent MPLS is UP and site is not on 5G (CradlePoint).
Capture baseline routing table and path selection (data center ↔ site).

Prepare Route Exchanges (New MPLS)

Stage BGP neighbors, route maps/policies, communities, local-pref/med, and filters (no traffic shift yet).
Confirm prefix visibility (received/advertised but not yet preferred if using dry-run/soft policies).

Controlled Failover Drill

Shut the firewall port connected to the incumbent MPLS, validate site fails over to 5G as designed.
Confirm critical services function over 5G (quick health check).

Enable Route Exchanges on New MPLS

Bring up BGP policy to allow intended prefixes.

Traffic Validation (New MPLS)

Confirm traffic now flows over new MPLS (routing tables, traceroute, NetFlow, path metrics).

End-to-End Functional Tests

Validate routing adjacencies, prefixes learned/advertised, ECMP if applicable.
Telephony test: inbound test calls to site to confirm call quality (MOS where available, packet loss/jitter).
Data path tests: ICMP/HTTP/S to in-store servers from DC and reverse (DC → site; site → DC).

Communication & Handover

Communicate cutover success, attach test results and logs, and update trackers (CMDB/ITSM, change record, migration register).

Troubleshooting & Escalation

Investigate routing/policy/peering issues; engage assigned L4 per escalation matrix when needed.
Roll back per MoP if success criteria are not met within the allowed window.

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.

Dice Id: 91135097
Position Id: 8903083
Posted 5 hours ago

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