Dell W-Series 304 Instant 6.5.1.0-4.3.1.0 User Guide - Page 326
In the Instant UI, Internet failover, In the CLI
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When the uplink switchover based on Internet availability is enabled, the W-IAP continuously sends Internet Control Management Protocol (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. You can set preferences for uplink switching by using the Instant UI and the CLI. In the Instant UI To configure uplink switching: 1. Click System > show advanced settings > Uplink. The Uplink tab contents are displayed. 2. Under Management, configure the following parameters: l VPN failover timeout-To configure uplink switching based on VPN status, specify the duration to wait for an uplink switch. The default duration is set to 180 seconds. l Internet failover-To configure uplink switching based on Internet availability, perform the following steps: a. Select Enabled from the Internet failover drop-down list. b. Specify the required values for the following parameters: n Max allowed test packet loss-The maximum number of ICMP test packets that are allowed to be lost to determine if the W-IAP must switch to a different uplink connection. You can specify a value within the range of 1-1000. n Secs between test packets-The frequency at which ICMP test packets are sent. You can specify a value within the range of 1-3600 seconds. n Internet check timeout-Internet check timeout is the duration for the test packet timeout. You can specify a value within the range of 0-3600 seconds and the default value is 10 seconds. l Internet failover IP-To configure an IP address to which the W-IAP must send W-IAP packets and verify if the Internet is reachable when the uplink is down. By default, the master W-IAP sends the ICMP packets to 8.8.8.8 IP address only if the out-of-service operation based on Internet availability (internetdown state) is configured on the SSID. 3. Click OK. When Internet failover is enabled, the W-IAP ignores the VPN status, although uplink switching based on VPN status is enabled. In the CLI To enable uplink switching based on VPN status: (Instant AP)(config)# uplink (Instant AP)(uplink)# failover-vpn-timeout (Instant AP)(uplink)# end (Instant AP)# commit apply To enable uplink switching based on Internet availability: (Instant AP)(config)# uplink (Instant AP)(uplink)# failover-internet (Instant AP)(uplink)# failover-internet-ip (Instant AP)(uplink)# failover-internet-pkt-lost-cnt (Instant AP)(uplink)# failover-internet-pkt-send-freq (Instant AP)(uplink)# end (Instant AP)# commit apply Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide Uplink Configuration | 326