What is the performance like on older machines?
IPNetRouter itself is very fast by virtue of being Open Transport native. Routing is handled by OT within the OS kernel. Even a Mac IIsi (68030) can provide good performance depending on your network configuration. Older machines have other limitations however. Trying to use LocalTalk and a serial port at the same time will cause performance to suffer on machines that do not have DMA serial ports (non AV 68Ks). On these machines, LocalTalk disables interrupts for so long that your serial port can lose characters causing frequent retransmissions. The maximum serial port speed is 56k on such machines. Some PowerPC Performas may also suffer from DMA handling problems. Routing between two IP interfaces on a single Ethernet can also reduce performance (Cable or DSL modem with single Ethernet for example). In this configuration, the Ethernet must transfer each packet twice so the second transfer has to wait for the first transfer to get out of the way. Older machines typically do not have bu
