Router Firmware & Software Upgrade Services

What makes router upgrades distinct

The defining constraint of a router upgrade is that the device being upgraded is frequently the only path to the site it serves. A branch router losing its WAN link after a reboot is not a device you can log in and fix — it is a site that has gone dark until someone drives there. That reality shapes every decision in the plan: whether out-of-band access exists, whether the site has local hands available, whether a redundant path can carry the site during the change, and what the abort criteria are.

Routers also tend to accumulate configuration complexity that other devices do not — routing protocol relationships with carrier equipment, route maps and policy that encode years of accumulated business requirements, QoS classification tied to specific application flows, and IPsec tunnels to sites and partners. Validation after the change has to confirm those relationships re-formed, not merely that the interfaces came up.

Router platforms we support

Validation after a router upgrade

• Routing adjacencies — BGP sessions, OSPF neighbours and EIGRP adjacencies re-established with the expected peers and the expected prefix counts, not merely established.
• WAN link state — carrier circuits up, with throughput and latency consistent with the pre-change baseline.
• IPsec tunnels — site-to-site tunnels rebuilt and passing traffic, verified with actual reachability tests rather than tunnel state alone.
• QoS policy — classification and queueing applied and matching, since QoS syntax and default behaviour changes between software trains are a frequent source of post-upgrade voice and video degradation.
• Management reachability — SNMP, NetFlow, syslog and any NMS polling restored, so the device is visible to your monitoring before the window closes.
• Licensing — throughput and feature licences re-applied where the platform requires it after a version change.

Frequently asked questions

Can a branch router be upgraded remotely?

Often yes, provided there is an out-of-band access path — a cellular backup connection, a console server, or a secondary link that does not depend on the router being upgraded. Where no independent path exists, we recommend either scheduling on-site presence or arranging local hands who can console in and load a fallback image if the device does not come back.

What happens to my BGP sessions during the upgrade?

They drop when the router reboots and re-establish after. If the site has a redundant path, traffic reconverges to it for the duration. If it does not, the site is offline for the reboot period. Where the platform and design support it, techniques such as graceful restart or in-service software upgrade can reduce the impact, and we identify during planning whether your environment can use them.

Do you upgrade routers across multiple branches?

Yes. Multi-site branch router upgrade programmes are common work for us. We pilot on a small representative group, confirm the process and timings hold, then roll out in waves with a go/no-go gate between them so a problem found in wave two does not propagate to the rest of the estate.

How do you handle Cisco IOS XE install mode versus bundle mode?

The two modes have different upgrade procedures, different storage requirements and different rollback behaviour, so establishing which mode a device is running is part of the assessment. Converting between modes during an upgrade is possible but is a separate decision that should be made deliberately rather than encountered mid-window.

What is the rollback plan for a router?

We confirm the previous software image remains present on the device where storage allows, capture a verified configuration backup before the change, and agree a decision point within the window at which we roll back rather than continue troubleshooting. For devices where storage does not permit retaining two images, the rollback plan involves a console-based recovery procedure and the necessary access is arranged in advance.

Related services

• Network Device Firmware Upgrade
• Network Switch Upgrade
• Configuration Backup & Recovery
• Routing & WAN
• Request an Upgrade Assessment