Руководство Пользователя для Netopia 3346N-ENT

The Router will recognize a delay-sensitive packet as having the low-latency bit set in the TOS field of the IP 
header.

If you toggle Prioritize Delay-Sensitive Data to Yes the router will place these packets at the front of the 
transmission queue to the WAN link, over taking non-delay-sensitive traffic. Accepting the default No will allow 
the normal sequential queue of data packets.

Beginning with Firmware Version 8.5.1, the firmware offers VRRP Options to detect Layer 3 link failures on the 
WAN. When you enable this feature, the Netopia Router will continuously Ping one or two hosts that you specify 
to determine when a link fails, even if the physical connection remains established. If Layer 3 WAN Link Failure 
Detection is enabled, the Netopia Router will send continuous Pings, so the WAN link will stay up and idle 
timeout will not occur.

See 

 for a detailed description of VRRP and how to create 

Vir tual Routers.

To enable WAN Link Failure Detection, select VRRP Options in the Advanced Connection Options menu. The 
VRRP Options menu appears.

                          Advanced Connection Options

                     Configuration Changes Reset WAN Connection:     Yes

                     Scheduled Connections...

                     Backup Configuration...

                     Prioritize Delay-Sensitive Data: No

                     Diffserv Options...

                     VRRP Options...

Return/Enter to configure SA Backup Parameters.