Administration of the Avaya G350 Media Gateway - Avaya Support

Configuring the routerDHCP/BOOTP relayThe Avaya G350 Media Gateway supports the DHCP/BOOTP relay agent function. This is anapplication that accepts DHCP/BOOTP requests that are broadcast on one VLAN. Theapplication sends them to a DHCP/BOOTP server. That server connects to another VLAN or aserver that might be located across one or more routers that might otherwise not get thebroadcast request. The relay agent handles the DHCP/BOOTP replies as well. The relay agenttransmits the replies to the client directly or as broadcast, according to a flag in the replymessage.Note:Note:The same DHCP/BOOTP relay agent serves both the BOOTP and DHCPprotocols.When there is more than one IP interface on a VLAN, the G350 chooses the lowest IP addresson this VLAN when relaying DHCP/BOOTP requests. The DHCP/BOOTP server then uses thisaddress to decide the network from which to allocate the address. When there are multiplenetworks configured, the G350 performs a round-robin selection process.When the DHCP/BOOTP server is configured to allocate addresses only from a singlesubnetwork among the different subnetworks defined on the VLAN, you might need to configurethe G350 with the relay address on that subnet so the DHCP/BOOTP server can accept therequest.DHCP/BOOTP Relay in G350 is configurable per VLAN and allows for two DHCP/BOOTPservers to be specified. In this case, the G350 duplicates each request, and sends it to bothservers. This duplication provides redundancy and prevents the failure of a single server fromblocking hosts from loading. You can enable or disable DHCP/BOOTP Relay in G350.DHCP/BOOTP relay commandsUse the following commands to configure DHCP relay and BOOTP relay:●●●Use the ip bootp-dhcp network command to select the network from which theBOOTP/DHCP server should allocate an address. This command is required only whenthere are multiple IP interfaces over the VLAN. Use the no form of this command torestore the default value. You must be in interface context to use this command.Use the ip bootp-dhcp relay command to enable relaying of BOOTP and DHCPrequests to the BOOTP/DHCP server. Use the no form of this command to disablerelaying of BOOTP and DHCP requests. You must be in general context to use thiscommand.Use the ip bootp-dhcp server command to add a BOOTP/DHCP server to handleBOOTP/DHCP requests received by this interface. A maximum of two servers can beadded to a single interface. Use the no form of this command to remove a server. Youmust be in interface context to use this command.178 Administration of the Avaya G350 Media Gateway