Ultimate Guide to Troubleshooting Extreme Wireless Networks: CLI Tips and Best Practices
In the fast-paced world of networking, ensuring a seamless wireless experience is critical. Troubleshooting plays a vital role in identifying and resolving issues efficiently. This guide will equip you with actionable steps, leveraging CLI commands and best practices for tackling common problems in Extreme Wireless environments.
1. Understanding Your Network Environment
Before diving into troubleshooting, gather essential network information:
Network Topology
Device Roles (APs, Switches, Routers)
VLAN Configuration
From the CLI, use the following command to verify VLAN details:
show vlan
This will list all VLANs, their IDs, and associated interfaces.
2. Identifying Logon and Connection Issues
Who logged in last? Run this to check the last login event:
Show log buffer | include Login
Troubleshooting CAPWAP Connectivity: If APs are failing to connect to Extreme Cloud IQ:
show capwap client
Verify:
CAPWAP status (CONNECTED or DISCONNECTED)
CAPWAP Server IP and status:
capwap ping <CAPWAP_Server_IP>
DNS and Gateway Configuration: Ensure your DNS and gateway settings are accurate:
show dns
show ip route
3. VLAN and IP Troubleshooting
VLAN Configuration and DHCP Issues: If devices are failing to get IP addresses:
show dhcp leases
Verify DHCP scopes and VLAN mapping:
show interface vlan <VLAN_ID>
IP Helper Check: Ensure IP helpers for DHCP relay are set correctly:
show ip helper-address
4. RF Troubleshooting (Layer 1 Issues)
RF interference and poor signal quality are common in wireless networks. Use the following commands to diagnose:
show acsp neighbor
This command helps identify neighboring APs and potential interference sources.
Check Signal Quality:
show wifi clients
Pay attention to:
RSSI (Signal Strength)
SNR (Signal-to-Noise Ratio)
For deeper RF analysis:
show spectrum-analysis
5. Authentication and RADIUS Issues
For networks using 802.1X, authentication issues can be common.
RADIUS Server Status:
show radius server
If authentication fails:
radius test <RADIUS_Server_IP> <Shared_Secret>
Check logs for errors:
show log buffer | include RADIUS
6. Managing Firmware and Configurations
Keeping your devices updated is crucial for optimal performance.
Check Current Firmware Version:
show version
Upgrade Device Firmware via CLI:
upgrade iqengine <image_url>
Rollback Configuration if Needed:
show config rollback