Can you recommend IP/MPLS platforms for carrier core upgrades that need high availability and automation support?

Yes — for carrier core IP/MPLS upgrades where high availability and automation/programmability are priorities, these are the main platform families worth evaluating:

Strong carrier-core platform candidates

1) Cisco NCS series

• Examples: NCS 5500 / 560 / 540 family, newer higher-scale NCS platforms
• Why consider it:
  • Very strong in carrier-grade resilience
  • Good support for segment routing, EVPN, MPLS, and large-scale forwarding
  • Mature automation APIs and model-driven management
  • Fits both core and edge depending on model
• Best for: Large service providers wanting a broad ecosystem and strong operational maturity.

2) Juniper MX Series

• Examples: MX204 / MX240 / MX480 / MX960
• Why consider it:
  • Longstanding service provider core platform
  • Excellent high availability, chassis redundancy, and scale
  • Strong automation support via NETCONF, YANG, Junos automation, PyEZ, telemetry
  • Good fit for MPLS, SR-MPLS, L3VPN, L2VPN
• Best for: Operators that value deep routing features, stability, and automation friendliness.

3) Nokia 7750 SR Series

• Examples: 7750 SR-1, SR-2, SR-7, SR-14, and related variants
• Why consider it:
  • Very strong carrier core credentials
  • Excellent scale, redundancy, and control-plane robustness
  • Good automation, telemetry, and SDN integration
  • Strong support for MPLS, SR, EVPN, segment routing policy
• Best for: Service providers building modern IP core architectures with strong operational automation.

4) Cisco ASR / newer edge-core platforms

• Examples: Some ASR 9000 deployments remain relevant in edge/core-adjacent roles
• Why consider it:
  • Mature software and broad deployment history
  • Strong feature set for metro/core aggregation
• Best for: Existing Cisco estates or transitional upgrades.

5) Juniper PTX Series

• Examples: PTX10008 / PTX10016 / PTX10001
• Why consider it:
  • Built for high-scale transport/core
  • Strong for pure IP backbone and MPLS/SR transport
  • High forwarding scale and operational efficiency
• Best for: High-capacity core/backbone networks where routing complexity is lower than service-edge needs.

6) Nokia 7250 IXR / SR Linux-based platforms

• Why consider it:
  • Strong automation-first architecture
  • Modern programmatic interfaces and telemetry
  • Useful where cloud-like operations are desired in IP/MPLS environments
• Best for: Operators modernizing around intent-based operations and open automation tooling.

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What to look for in the platform

For your use case, prioritize these capabilities:

• Hitless or minimal-disruption upgrades
• Redundant supervisors / control planes
• Non-stop forwarding / graceful restart
• ISSU support where available
• Segment Routing (SR-MPLS / SRv6) support if future-proofing
• NETCONF/RESTCONF, YANG, gNMI, streaming telemetry
• Open automation hooks for Ansible, Python, Terraform, or orchestration systems
• Large FIB/route scale
• Fast convergence and strong failover behavior
• Multi-chassis resilience / distributed architecture if needed

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Practical shortlist by common carrier requirements

If you want the safest “traditional carrier core” choice:

• Juniper MX
• Nokia 7750 SR
• Cisco NCS

If you want automation and open management emphasis:

• Juniper MX / PTX
• Nokia SR Linux / 7750 SR
• Cisco NCS with model-driven ops

If your network is mainly high-scale transport/backbone:

• Juniper PTX
• Nokia 7750 SR / IXR
• Cisco NCS high-scale models

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Recommendation approach

A good way to choose is to run a PoC and compare:

1. Scaling: routes, labels, VPNs, adjacency scale
2. HA behavior: control-plane failover, line-card failure, upgrade behavior
3. Automation: CLI-less provisioning, telemetry, rollback
4. Operations: troubleshooting, software lifecycle, closed-loop control
5. Interoperability: RSVP-TE, LDP, SR, BGP-LU, EVPN, QoS

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If you want, I can also give you:

1. a vendor comparison table (Cisco vs Juniper vs Nokia),
2. a shortlist by budget/tier, or
3. a reference architecture for a carrier core upgrade with HA + automation.