Common Networking Issues and How to Fix them
A reliable network is essential for every organisation, from MSPs and ISPs to corporate offices and data centres. But even the best environments experience issues from time to time. The key is knowing what to look for and how to fix problems fast before they impact productivity or customers.
Below are the most common networking challenges businesses face and simple, effective ways to resolve them.
1. Slow or Unstable Network Performance
Lagging applications, buffering video calls, and slow file transfers usually point to congestion, outdated hardware, or misconfigurations.
How to fix it:
- Check for Bandwidth-hungry applications or devices.
- Update device firmware and software.
- Segment traffic using VLANs.
- Replace old switches and routers with reliable refurbished enterprise gear.
- Use monitoring tools (SNMP, iPerf, traceroute) to locate network constraints.
2. Frequent Drops or Outages
Unexpected downtime disrupts teams and damages customer confidence.
How to fix it:
- Inspecting ageing hardware — failing power supplies and fans cause intermittent issues.
- Ensure redundancy (dual PSUs, HA routing engines, stacked switches).
- Replace damaged cables.
- Review system logs for early warnings.
- Swap out unreliable hardware with tested, certified refurbished replacements.
3. IP Address Conflicts
Two devices sharing the same IP will break connectivity instantly.
How to fix it:
- Use DHCP reservations to avoid duplicates.
- Document static IP assignments clearly.
- Check for unauthorised or rogue devices connected to your network.
4. Security Gaps
Outdated firmware and unsupported hardware create opportunities for cyberattacks.
How to fix it:
- Keep firmware up to date.
- Segment your network using VLANs or firewalls.
- Implement strong authentication.
- Replace end-of-life hardware that no longer receives security patches.
- Use refurbished, still-supported enterprise equipment to upgrade affordably.
5. Poor Wi-Fi Coverage
Dead spots and weak wireless performance slow down teams and frustrate users.
How to fix it:
- Conduct a wireless site survey.
- Upgrade to enterprise-grade access points
- Position APs correctly (away from walls, metal, and interference)
- Use 5 GHz for higher-density areas and 2.4 GHz for longer-range coverage.
6. Misconfigured Devices
Small configuration errors cause big problems; routing loops, VLAN mismatches, and flapping links.
How to fix it:
- Regularly review configs.
- Standardise templates across devices.
- Keep backup configs for quick restores.
- Document your network architecture.
- Involve experts when dealing with complex Juniper or multivendor setups.
The Right Hardware Makes All the Difference
Many networking issues stem from outdated or failing equipment. That doesn’t mean you need to buy brand-new hardware. Often, certified refurbished enterprise equipment delivers the same performance with:
✔ Lower cost
✔ Strong reliability
✔ Extended lifespan
✔ Reduced environmental impact
At Circle Stock, we provide refurbished, fully tested, and certified networking equipment from Juniper and other major brands, helping organisations build stable, high-performing networks without overspending or adding to global e-waste.
