Reference Guide

Uplink Switchover
The default priority for uplink switchover is Ethernet and then 3G/4G. The W-IAP has the ability to switch to the lower
priority uplink if the current uplink is down.
Uplink Switching based on VPN Status
Instant supports switching uplinks based on the VPN status when deploying mixed uplinks (Eth0, 3G/4G,Wi-Fi).
When VPN is used with multiple backhaul options, the W-IAP switches to an uplink connection based on the VPN
connection status instead of only using Eth0, the physical backhaul link.
The following configuration conditions apply to uplink switching:
l If the current uplink is Eth0 and the VPN connection is down, the W-IAP will retry to connect to VPN. This retry
time depends on the configuration of primary/backup and fast-failover for VPN. If all the possibilities fail, then the
W-IAP waits for a vpn-failover-timeout and then a different u plink (3G,Wi-Fi) is selected.
l If the current uplink is 3G or Wi-Fi, and Eth0 has a physical link, the W-IAP periodically suspends user traffic to
try and connect to the VPN on the Eth0. If the W-IAP succeeds, then the W-IAP switches to Eth0. If the W-IAP
does not succeed, then the W-IAP restores the VPN connection to the current uplink.
Switching Uplinks Based on Internet Availability
When the uplink switchover based on Internet availability is enabled, the W-IAP continuously sends ICMP packets
to some well-known Internet servers. If the request is timed out due to a bad uplink connection or uplink interface
failure, and the public Internet is not reachable from the current uplink, the W-IAP switches to a different connection.
Example
The following example configures uplink priority:
(Instant AP)(uplink)# uplink-priority ethernet port 0 1
(Instant AP)(uplink)# end
(Instant AP)# commit apply
Command History
Version Description
Dell Networking W-Series Instant 6.4.0.2-
4.1
This command is modified.
Dell Networking W-Series Instant 6.2.1.0-
3.3
This command is introduced.
Command Information
W-IAP Platform Command Mode
All platforms
Configuration mode and uplink configuration sub-mode.
Dell Networking W-Series Instant 6.4.0.2-4.1 | CLI Reference Guide uplink | 507