Administration of the Avaya G350 Media Gateway - Avaya Support

Configuring a WAN InterfaceFigure 6: G350 with T1 and xDSL lines2 x T1/E1 or USP WAN ModuleT1G350S8300VoiceVlan1DSCPRouterT1ISPxDSL1DataVlan2DSCPHub/SwitchHeadquartersSmall BranchFor example, your branch office may have a G350 that connects to the Headquarters over a T1line and via an xDSL connection to the Internet. The T1 line is used for voice traffic, while datapackets are sent over the xDSL line. Normal keepalive cannot report on the status of the entireWAN path. If the FastEthernet line protocol is up but the xDSL connected to it is down, normalkeepalive reports that the FastEthernet interface is up. Only Extended Keepalive, which checksthe next hop, correctly reports that the WAN path is down. Policy-based-routing, which relies onthe interface status to determine how packets are routed, can use Extended Keepalive to knowthe status of the interfaces on its next hop list.Note:Note:Extended Keepalive is not used with a GRE tunnel interface. The GRE tunnel hasits own keepalive mechanism. For details, refer to Administration of the AvayaG350 Media Gateway, 555-245-501.Use the extended-keepalive command in the context of the interface to enable theextended keepalive feature. Use the no form of this command to deactivate the feature.The extended-keepalive command includes the following parameters:●●destination ip address — the destination IP address for the keepalive packets.next hop MAC address — the next hop MAC address for the keepalive packets. Thisparameter is only relevant for the WAN Fast Ethernet port.Use the following commands to define the extended keepalive parameters. For moreinformation about these commands, see Avaya G350 Media Gateway CLI Reference,555-245-202.●●Use the extended-keepalive timeout command to set the timeout (in seconds) forreceiving the keepalive response. The default value is 1.Use the extended-keepalive success-retries command to set the number ofconsecutive successful keepalive packets necessary to set the interface’s keepalive statusas up. The default value is 1.100 Administration of the Avaya G350 Media Gateway