Administration of the Avaya G350 Media Gateway - Avaya Support

Configuring the routerApplication — G350 as a DHCP server and routerIn the typical application shown in Figure 14, the G350 is configured as a local DHCP serverand router for IP phones and PCs in the branch office. The remote DHCP server allocates IPaddresses for headquarters users. In case of WAN failure, the local DHCP server can stillallocate IP addresses in the branch offices. If there is a local ICC or LSP, calls can still be made.If there is no ICC or LSP to control calls, the DHCP server can allocate IP addresses to alldevices, but, since no calls can be made, the IP address allocation effectively applies to PCsonly.Figure 14: G350 as server and routerS8700/S8300134.1.158.1LucentTechnologiesRouter134.1.157.3T1/E1 or USP WAN Module.LAN134.1.159.1134.1.157.2G350 DHCP ServerdS8300DCPTelephoneTFTP Server134.1.159.21DHCP Server134.1.159.20IP TelephoneHeadquartersPC StationSmall Branch134.1.156.3The branch DHCP server does not depend on the headquarters’ DHCP server. There is nobackup mechanism between the servers. The branch DHCP server operates continuallyregardless of the status of the centralized DHCP server or the WAN link.By default, the DHCP server is inactive. Before activating DHCP server, you configure DHCPpools to define ranges of IP addresses and other network configuration information to beassigned to clients. Create a minimum of two dynamic pools: at least one pool for data devices(PCs) and at least one pool for voice devices (IP phones). The G350 also supports reservationpools, which map hardware addresses/client identifiers to specific IP addresses. Reservationpools may be required for security issues or VPN appliances.Overlap between pools is not allowed. You cannot configure a reservation pool on anIP address that falls within the range of another pool.180 Administration of the Avaya G350 Media Gateway