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How to Decommission Cisco and Juniper Infrastructure Safely

An engineer-led guide to safely decommissioning Cisco and Juniper switches, routers and firewalls, covering dependencies, rollback, sanitisation and evidence.

By Tosin Otuniyi, Founder and Network and Security Architect ·

Decommissioning Cisco or Juniper infrastructure is not simply a matter of saving a configuration, issuing a reset command and removing equipment from a rack. Enterprise network devices sit inside a web of routing, switching, security, identity, monitoring, licensing and physical dependencies. A device that appears idle can still provide a default gateway, carry a dormant disaster-recovery path, supply power to operational technology, terminate an encrypted tunnel or retain credentials and customer-specific information.

The safe approach is therefore to treat decommissioning as three connected but distinct activities:

  1. An engineering change that removes live services without creating an outage.
  2. A security process that withdraws trust and handles configurations, credentials, logs, certificates and storage appropriately.
  3. An asset-disposition process that preserves custody, reconciles serial numbers and records the final destination of every item.

This guide explains how UK organisations can plan and control that work across Cisco IOS, IOS XE, NX-OS and Secure Firewall environments, and Juniper Junos switching, routing and security platforms. It is designed for network managers, infrastructure teams, data-centre operators, project managers, risk owners and organisations appointing a specialist decommissioning provider.

Important: Destructive procedures differ by model, hardware revision, installed modules, operating system and software release. Verify the exact vendor documentation and approved method for every device before erasing data or changing production state. Do not copy a command from another platform merely because both devices carry the same manufacturer’s badge.

What does safe Cisco and Juniper decommissioning mean?

A safe decommission achieves more than physical removal. At completion, the organisation should be able to demonstrate that:

  • the correct equipment was identified;
  • every production dependency was understood or formally accepted;
  • services were migrated and tested;
  • a workable rollback point existed before irreversible action;
  • administrative access, trust relationships and external registrations were removed;
  • customer configurations and locally stored information received an appropriate sanitisation outcome;
  • chassis, modules, power supplies, optics and storage components were reconciled;
  • reusable equipment was separated from equipment requiring destruction or recycling;
  • custody and final disposition were recorded;
  • residual records, monitoring objects and security exposure were closed.

“Powered off” is not the same as “decommissioned”. “Factory default” is not automatically the same as “securely sanitised”. “Removed from monitoring” is not proof that the device is no longer carrying traffic.

Why Cisco and Juniper projects require engineering knowledge

Cisco and Juniper product families use different architectures, terminology and operational models. Even within one vendor, the retirement procedure for a Catalyst access switch can differ from that of a Nexus data-centre switch, an ISR or ASR router, a wireless controller, an ASA appliance or a Secure Firewall chassis. The same applies across Juniper EX, QFX, MX and SRX families.

The engineer must understand both the individual device and its role in the wider topology. Typical risks include:

  • removing the active member of a firewall cluster rather than the intended standby node;
  • breaking a Cisco vPC or Juniper MC-LAG peer relationship before traffic has moved;
  • dismantling a switch stack or Virtual Chassis without recording member identities and cabling;
  • removing an HSRP or VRRP peer while the remaining gateway is unhealthy;
  • withdrawing a BGP peer before its prefixes have a valid alternative path;
  • disconnecting an access switch that still powers phones, cameras or access-control devices;
  • wiping a configuration before licence, ownership or return obligations have been resolved;
  • assuming that erasing the startup configuration removes all logs, crash files, certificates and user files;
  • leaving cloud-managed equipment assigned to the former organisation or tenant;
  • reselling modular equipment without reconciling line cards, transceivers or removable storage.

The project should be led by evidence rather than assumptions.

Phase 1: Establish authority, ownership and scope

Appoint accountable owners

Identify the people responsible for:

  • business approval;
  • technical design and execution;
  • change-management approval;
  • cyber-security decisions;
  • data ownership;
  • asset ownership;
  • site and rack access;
  • carrier and third-party coordination;
  • sanitisation approval;
  • acceptance of the final evidence pack.

Destructive actions must be authorised explicitly. A technician should never have to infer whether a configuration, certificate, licence or storage device may be erased.

Define the physical and logical boundary

Record what is included and excluded:

  • sites, rooms, racks and cabinets;
  • hostnames, management addresses, serial numbers and asset tags;
  • chassis, supervisors, Routing Engines, line cards and fabric modules;
  • stack or Virtual Chassis members;
  • firewall contexts, logical systems, virtual devices and routing instances;
  • access points, wireless controllers and cloud-managed devices;
  • console servers and out-of-band management;
  • optics, DACs, power supplies, fans and spare modules;
  • removable flash, SSDs, hard disks and USB media;
  • cables, patch panels and PDUs;
  • leased, carrier-owned or customer-owned equipment;
  • configurations, backups, logs and related records.

Use a written exception list for equipment that is physically present but must remain operational.

Decide the disposition before touching the device

Each asset should have an intended outcome:

  • internal redeployment;
  • transfer to another site or group company;
  • return to a lessor, carrier or manufacturer;
  • resale or remarketing;
  • retention as a tested spare;
  • parts recovery;
  • recycling;
  • physical destruction.

Disposition affects licensing, sanitisation, packaging, testing and evidence. A router being redeployed internally may require a different treatment from a firewall leaving organisational control.

Phase 2: Build a defensible inventory

Capture chassis and component identity

Record, where applicable:

  • manufacturer and product family;
  • exact model and hardware revision;
  • chassis serial number;
  • asset tag;
  • hostname and management address;
  • rack and unit position;
  • operating system and release;
  • supervisor or Routing Engine inventory;
  • line cards and service modules;
  • stack or Virtual Chassis member numbers;
  • power supplies and fan trays;
  • transceivers and interface modules;
  • removable and internal storage;
  • support and licence status;
  • ownership and intended disposition.

For modular platforms, a chassis-only record is incomplete. High-value or data-bearing modules can be removed separately, so each significant component should remain traceable.

Correlate records with live evidence

Compare the physical survey against:

  • CMDB and asset registers;
  • Cisco DNA Center or Catalyst Center;
  • Cisco Smart Software Manager and relevant cloud portals;
  • Cisco Secure Firewall Management Center;
  • Cisco Meraki Dashboard where applicable;
  • Juniper Mist and Juniper management platforms;
  • network-monitoring and configuration-backup systems;
  • IP address management, DNS and DHCP;
  • authentication and privileged-access systems;
  • vulnerability scanners and SIEM platforms;
  • carrier circuit inventories;
  • support contracts, subscriptions and invoices.

Differences should become tracked exceptions. A device found in the rack but absent from the CMDB may be more important—not less—because its ownership and function are uncertain.

Phase 3: Prove what is still active

Do not rely on an old diagram or a single monitoring status.

Examine live operational state

Subject to authorised access and the relevant platform, review:

  • interface state, descriptions, counters and error history;
  • MAC address and ARP or neighbour tables;
  • LLDP and CDP neighbours;
  • routing adjacencies and learned prefixes;
  • spanning-tree roles and topology changes;
  • port channels, LAGs and aggregated Ethernet interfaces;
  • vPC, MLAG, Virtual Chassis and stack state;
  • first-hop redundancy status;
  • firewall sessions, NAT state and VPN tunnels;
  • PoE consumers;
  • wireless access points and clients;
  • CPU, memory, environmental and hardware alarms;
  • recent commits, configuration changes and logs;
  • telemetry, flow and monitoring history.

A low traffic count is not sufficient evidence that a link is unused. Backup paths, overnight processing, emergency systems and disaster-recovery services can remain quiet for long periods.

Observe for a representative period

Choose an observation window that reflects the organisation’s workload. Month-end processing, backup cycles, scheduled supplier transfers or failover testing may not appear during a short survey.

Where uncertainty remains, record it and obtain formal acceptance rather than silently classifying the connection as redundant.

Phase 4: Map Cisco-specific dependencies

Catalyst switching environments

Check for:

  • StackWise or StackWise Virtual membership;
  • active and standby roles;
  • uplink port channels;
  • spanning-tree root and secondary-root roles;
  • HSRP or other gateway redundancy;
  • switch virtual interfaces;
  • DHCP snooping, device tracking and security bindings;
  • 802.1X, MAB and RADIUS dependencies;
  • PoE phones, access points, cameras and building systems;
  • embedded wireless-controller functions;
  • local flash files and configuration archives.

Before splitting a stack, record the member numbers, priorities, serial numbers, software versions, stack cabling and uplinks. Removing the wrong member can affect mastership, forwarding capacity or power arrangements.

Nexus data-centre environments

Review:

  • vPC peer status, peer links and keepalive paths;
  • port channels and orphan ports;
  • Fabric Extenders and their parent relationships;
  • VDCs where supported;
  • VXLAN EVPN roles, NVE peers and VTEPs;
  • routing adjacencies and underlay links;
  • storage or converged-network dependencies;
  • management, fabric and supervisor redundancy;
  • configuration, logs and content stored on bootflash, flash or SSD media.

Do not assume that write erase provides the same outcome as a supported secure-erase or factory-reset procedure. Cisco documents platform-specific secure-erase behaviour for supported Nexus families, including removal of configuration, logs and storage contents on applicable models and releases.

Cisco routing and WAN platforms

For ISR, ASR, NCS and Catalyst edge platforms, check:

  • BGP, OSPF, EIGRP or IS-IS relationships;
  • MPLS, VRF and route-target dependencies;
  • SD-WAN controllers, templates and certificates;
  • voice gateways and emergency calling;
  • LTE or cellular modules;
  • hardware security, crypto and licence implications;
  • ROMMON variables, bootflash, hard disks and removable media;
  • carrier demarcation and circuit ownership.

Factory-reset capabilities vary by product and release. Some Cisco procedures can remove boot images, licences, logs, ROMMON variables or other data; other reset actions may clear only configuration. Confirm exactly what the selected operation erases and what the device will require to boot afterward.

Cisco firewalls and security appliances

Before removing an ASA, Firepower or Secure Firewall platform, identify:

  • active and standby roles;
  • failover and state links;
  • routed or transparent operation;
  • security contexts or logical devices;
  • site-to-site and remote-access VPNs;
  • NAT rules and externally referenced addresses;
  • certificates, private keys and trust points;
  • identity, directory and MFA integrations;
  • management-controller and policy-manager relationships;
  • logging, SIEM and incident-response dependencies;
  • local storage, packet captures and troubleshooting files.

Removing a device from a central manager is not necessarily a sanitisation procedure. Likewise, applying a default configuration may not erase every file or storage area. Use the documentation for the precise appliance, software mode and release.

Phase 5: Map Juniper-specific dependencies

EX and QFX switching environments

Check for:

  • Virtual Chassis membership and mastership;
  • Virtual Chassis Fabric where applicable;
  • MC-LAG peers and inter-chassis links;
  • aggregated Ethernet interfaces;
  • spanning-tree roles;
  • IRB interfaces and first-hop redundancy;
  • EVPN and VXLAN functions;
  • Mist or other management-platform assignment;
  • PoE consumers;
  • rescue configuration and rollback files;
  • local logs, core files and support information.

Record member numbers, serial numbers, roles, cabling and software compatibility before dismantling a Virtual Chassis. Treat each physical member as a separate asset even when the logical system is managed as one device.

MX routing environments

Review:

  • Routing Engine mastership and redundancy;
  • chassis clusters or logical systems where applicable;
  • routing instances and VRFs;
  • BGP, OSPF, IS-IS, MPLS and LDP dependencies;
  • route reflectors and provider-edge functions;
  • subscriber, broadband or carrier services;
  • line cards, MICs, MPCs and optics;
  • configuration synchronisation and commit history;
  • local storage on each Routing Engine.

An MX chassis may contain substantial value and multiple independently identifiable components. The project inventory should not collapse the whole platform into a single line item.

SRX security environments

Confirm:

  • chassis-cluster node roles and redundancy groups;
  • control and fabric links;
  • security zones and interfaces;
  • security policies and address books;
  • source and destination NAT;
  • IPsec and remote-access VPNs;
  • certificates, keys and PKI dependencies;
  • logical systems and routing instances;
  • AppSecure, logging and security feeds;
  • central management and cloud registration;
  • local logs and storage.

Both nodes of a cluster must be addressed in the plan. Sanitising one node while leaving customer data on its peer does not complete the decommission.

Phase 6: Design migration, validation and rollback

Establish a reversible sequence

A controlled plan normally progresses through:

  1. replacement readiness;
  2. configuration and policy migration;
  3. controlled traffic movement;
  4. functional and security testing;
  5. observation;
  6. logical withdrawal;
  7. approved power-down;
  8. physical removal;
  9. sanitisation;
  10. final reconciliation.

Do not perform irreversible sanitisation while rollback may still require the device.

Define success tests

Tests should be service-specific and may include:

  • internal and external reachability;
  • application transactions;
  • routing-table and adjacency checks;
  • redundancy and failover tests;
  • VPN establishment;
  • firewall-policy validation;
  • DNS, DHCP, NTP and AAA functions;
  • monitoring and alerting;
  • voice, wireless and PoE services;
  • management and out-of-band access;
  • log delivery to the SIEM.

Record who performed each test and who accepted the result.

Make rollback operationally credible

Specify:

  • the last reversible step;
  • trigger thresholds and decision authority;
  • configuration and cabling restoration steps;
  • required staff and access;
  • old and new addressing or routing state;
  • expected recovery time;
  • how rollback itself will be validated.

“Reconnect if necessary” is not a rollback plan.

Phase 7: Preserve approved evidence before destructive action

Capture only what the organisation is authorised and required to retain:

  • final running and startup configurations;
  • configuration hashes;
  • software and firmware versions;
  • licence and entitlement information;
  • device and module inventories;
  • routing and neighbour state;
  • interface state and counters;
  • cluster, stack or chassis membership;
  • diagrams and rack elevations;
  • approved photographs;
  • change records and test results;
  • logs required for audit or incident retention.

Configuration files are sensitive. They can contain internal addressing, usernames, password hashes, encrypted secrets, SNMP communities, API tokens, VPN pre-shared keys, certificates and topology information. Store them in an access-controlled repository under the organisation’s retention policy; do not attach them casually to tickets or disposal paperwork.

Phase 8: Withdraw trust and management access

Before or immediately after physical retirement, remove the device from systems that continue to trust or manage it.

Review:

  • TACACS+, RADIUS and directory entries;
  • privileged-access vaults;
  • SSH keys and local administrative accounts;
  • SNMP communities and credentials;
  • NETCONF, RESTCONF, API and automation credentials;
  • PKI certificates and private keys;
  • site-to-site VPN identities and pre-shared keys;
  • allowlists and management ACLs;
  • monitoring and configuration-backup systems;
  • SIEM, syslog and telemetry collectors;
  • DNS, DHCP and IPAM;
  • Cisco Smart Licensing and relevant portals;
  • Cisco Meraki, Catalyst Center and management platforms;
  • Juniper Mist and other orchestration systems;
  • vendor support portals and subscriptions.

Where a certificate or secret may have been copied elsewhere, deleting it from the device does not revoke the trust. Revoke, rotate or expire credentials according to the organisation’s security design.

Phase 9: Select the correct sanitisation outcome

Distinguish three different outcomes

Configuration removal removes or replaces the active or startup configuration.

Factory reset returns some or all device settings to a vendor-defined initial state.

Secure sanitisation aims to make customer data on relevant storage infeasible to recover to the standard required by the organisation.

These are not automatically equivalent.

Cisco platform considerations

Cisco publishes different procedures across IOS, IOS XE, NX-OS, ASA, FXOS and other product families. Depending on the supported model and release, a procedure may affect:

  • running and startup configuration;
  • NVRAM;
  • bootflash or SSD contents;
  • system images;
  • logs and crash files;
  • ROMMON variables;
  • licence information;
  • FEX or module data;
  • controller or chassis configuration.

For example, Cisco documents secure factory-reset options on supported IOS XE platforms and secure-erase processes for supported Nexus platforms. The precise scope and prerequisites differ. Some operations can render a device unable to boot until software is restored, so the intended resale or reuse outcome must be considered before execution.

Juniper platform considerations

Juniper documents request system zeroize as removing configuration information, resetting key values and removing user-created data files such as customised configurations and logs. On platforms with dual Routing Engines, the operation can apply to both. The device reboots to a factory-default state, and subsequent access requirements may change.

That documented behaviour does not remove the need to check the exact Junos release, hardware family, additional storage, FIPS mode, cloud-management assignment and any replaceable media. Confirm whether every relevant storage component is covered by the chosen process.

Failed, damaged or inaccessible equipment

A device that does not boot may still contain recoverable information. Do not mark it as sanitised merely because normal administrative access is unavailable.

Create an exception that records:

  • asset and component identity;
  • failure condition;
  • storage believed to be present;
  • attempted approved method;
  • risk decision;
  • alternative treatment;
  • authorisation and evidence.

Where sanitisation cannot be verified, suitable physical destruction of data-bearing media may be required under the organisation’s policy.

Phase 10: Verify sanitisation rather than assuming success

A completed command is evidence of an attempted procedure, not automatically evidence that the required outcome was achieved.

Verification may include:

  • confirming the documented process completed without error;
  • checking the resulting boot or factory-default state;
  • confirming customer configuration is absent;
  • checking local user accounts, logs and files where appropriate;
  • verifying both supervisors, Routing Engines or cluster nodes were covered;
  • accounting for removable and embedded storage;
  • recording the model, serial number, method, operator, date and result;
  • separating failures for further treatment.

The record should state what was verified, not make an unsupported universal claim such as “all data destroyed” when the actual process only reset the configuration.

Phase 11: Remove equipment safely from the rack

Plan power and physical handling

Before removal:

  • identify A and B power feeds;
  • confirm shared PDUs and circuit capacity;
  • check chassis weight and lifting requirements;
  • use appropriate handling equipment and sufficient personnel;
  • confirm hot components have cooled where necessary;
  • control fibre exposure and fit protective caps;
  • use ESD controls for modules and components;
  • photograph or label cables if any infrastructure remains;
  • protect adjacent live equipment;
  • maintain clear access and safe working space.

Large chassis, UPS-connected equipment and high-density platforms require a documented method rather than improvised manual handling.

Control optics and accessories

Optics, DACs, line cards and power supplies can have significant residual value. Record whether each component stays with the chassis, is retained by the customer or enters the disposition inventory separately.

Do not leave unrecorded components in a rack or mix customer-owned items with carrier equipment.

Phase 12: Maintain chain of custody

At each transfer, record:

  • date and time;
  • releasing and receiving parties;
  • site and location;
  • asset identifiers;
  • item count;
  • seal or container information where used;
  • vehicle or transport reference where appropriate;
  • next controlled location;
  • discrepancies and exceptions.

Keep data-bearing equipment secure while it awaits processing. The ICO’s audit guidance expects organisations to document secure disposal methods, retain destruction records and obtain evidence from third parties handling assets on their behalf.

Phase 13: Decide between reuse, remarketing and recycling

After the approved data outcome:

Reuse or remarketing may be suitable when:

  • the device has a viable supported or clearly disclosed use;
  • ownership and licensing permit transfer;
  • the sanitisation result is verified;
  • hardware testing identifies no unsafe defect;
  • configuration and customer identity have been removed;
  • cloud-management and vendor registrations are released;
  • the buyer receives an accurate model, condition and support description.

Recycling or component recovery may be appropriate when:

  • the equipment is unsupported or uneconomic to repair;
  • sanitisation cannot be assured without media destruction;
  • the device is damaged;
  • resale would transfer unacceptable security or operational risk;
  • parts can be recovered responsibly before downstream recycling.

Use authorised downstream routes and retain evidence connecting the original asset to its final disposition.

Phase 14: Close the logical environment

After physical removal, search for residual references:

  • stale DNS and IPAM records;
  • monitoring and backup jobs;
  • AAA and privileged-access entries;
  • firewall objects and rules;
  • VPN peers and certificates;
  • routing policies and static routes;
  • orchestration and automation inventory;
  • cloud-management assignments;
  • support contracts and subscriptions;
  • CMDB relationships;
  • rack, power and capacity records;
  • vulnerability-scanner targets;
  • diagrams and operational documentation.

Removing monitoring too early hides evidence during migration; leaving it indefinitely creates false alarms and an inaccurate asset view. Retire records at the planned closure stage.

Phase 15: Build the completion evidence pack

A useful evidence pack should connect the engineering change to the physical disposition. It may contain:

  • approved scope and exclusions;
  • change record and authorisations;
  • before-and-after topology diagrams;
  • asset and component inventory;
  • migration and validation results;
  • exception register;
  • withdrawal of access and trust records;
  • sanitisation method and result per applicable asset;
  • certificates of destruction where applicable;
  • collection and custody records;
  • reuse, resale or recycling outcome;
  • photographs where authorised;
  • final reconciliation and sign-off;
  • lessons learned.

The certificate is part of the evidence, not a substitute for the underlying asset and engineering records.

Cisco and Juniper decommissioning checklist

Governance and scope

  • Business owner and technical authority appointed.
  • Change approval obtained.
  • Destructive actions explicitly authorised.
  • Sites, racks, devices and exclusions documented.
  • Ownership, leasing and carrier responsibilities confirmed.
  • Intended disposition assigned to every asset.

Discovery and dependency checks

  • Chassis and component serial numbers recorded.
  • Software releases and hardware roles captured.
  • Live interface, neighbour and routing evidence reviewed.
  • Stack, vPC, MC-LAG, cluster and Virtual Chassis roles confirmed.
  • Firewall, VPN, NAT and certificate dependencies reviewed.
  • PoE, voice, CCTV, access-control and facilities dependencies checked.
  • Cloud, licensing and management-platform associations recorded.

Migration and rollback

  • Replacement services ready.
  • Approved configuration backups secured.
  • Migration sequence documented.
  • Success tests agreed.
  • Observation period completed.
  • Rollback trigger, authority and procedure confirmed.
  • Final permission obtained before irreversible action.

Security and sanitisation

  • AAA, administrative and automation access withdrawn.
  • Certificates, keys and VPN identities revoked or rotated where required.
  • Device removed from continuing trust and management systems.
  • Exact vendor procedure verified for model and release.
  • Configuration reset and secure sanitisation treated as separate outcomes.
  • Both supervisors, Routing Engines, members or cluster nodes covered.
  • Removable and embedded storage accounted for.
  • Failures isolated and escalated.
  • Sanitisation result verified and recorded.

Physical removal and disposition

  • Power feeds and rack dependencies confirmed.
  • Safe handling method approved.
  • Optics, modules, power supplies and accessories reconciled.
  • Assets securely packaged and transferred.
  • Chain-of-custody record completed.
  • Reuse, remarketing, recycling or destruction outcome recorded.
  • Final inventory reconciled and signed off.

Closure

  • Monitoring, DNS, IPAM and CMDB records updated.
  • Firewall, routing and VPN remnants removed.
  • Cloud assignments and subscriptions closed or transferred.
  • Final evidence pack accepted.
  • Lessons learned recorded.

Common mistakes to avoid

Treating every Cisco device the same

IOS, IOS XE, NX-OS, ASA and FXOS do not share one universal sanitisation procedure. Model and release support matter.

Treating every Juniper device the same

An EX access switch, QFX fabric device, MX router and SRX cluster can have different architecture, media and operational dependencies.

Issuing a reset before preserving required evidence

The action may erase configuration, logs, licensing information or boot content needed for rollback, investigation or reuse.

Confusing factory default with secure erasure

A default configuration does not prove that every customer file or storage area was sanitised.

Forgetting the second control plane

Dual supervisors, dual Routing Engines, stack members and cluster peers must all be inventoried and processed.

Removing the device from management before validating migration

Monitoring and logging are valuable during the observation period. Retire them at the correct stage, not at the start.

Ignoring cloud and licensing ownership

A physically sanitised device can still remain assigned to an organisation’s vendor tenant or licence account.

Recording only the chassis

High-value modules, optics and data-bearing components may move independently. Component-level reconciliation protects both security and residual value.

Questions to ask a Cisco and Juniper decommissioning provider

  • Who performs the technical dependency assessment?
  • How do you prove a device is no longer carrying production traffic?
  • Can you interpret stacks, Virtual Chassis, vPC, MC-LAG, firewall clusters and routing dependencies?
  • How do you distinguish configuration removal from secure sanitisation?
  • How do you select and verify the correct procedure for each model and release?
  • What happens when a device does not boot or sanitisation fails?
  • Are supervisors, Routing Engines, modules and removable media recorded separately?
  • How are certificates, VPNs, AAA and management-platform registrations addressed?
  • What evidence connects the collected serial number to the sanitisation and disposition outcome?
  • How are reusable assets tested and how are downstream recyclers controlled?
  • What final engineering and asset reports will we receive?

Why an engineer-led approach matters

From my experience commissioning and decommissioning enterprise networks, the equipment that appears least important can create the greatest operational risk. A lightly used switch port may support CCTV, access control or an emergency telephone, while an apparently redundant firewall may still terminate a supplier VPN.

The correct starting point is therefore not removal—it is validation. The engineer must understand live state, redundancy, routing, security policy and physical topology before authorising disconnection. Only after migration has been tested and rollback is no longer required should the project progress to sanitisation and disposition.

Compritech combines Cisco and Juniper engineering knowledge with asset identification, secure data handling, chain of custody, value recovery and responsible recycling. This allows a project to be managed as one controlled lifecycle rather than disconnected engineering, logistics and disposal tasks.

Further authoritative guidance

Where decommissioning forms part of a wider infrastructure refresh, see our Cisco and Juniper infrastructure commissioning guide for planning, implementation, testing and operational handover considerations.

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