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36 .Nd RoadRunner-based HIPPI interfaces device driver
38 .Cd "esh* at pci? dev ? function ?"
42 device driver supports the Essential Communications RoadRunner-based
43 HIPPI interfaces. With some modifications, the driver could be
44 made to support the Gigabit Ethernet card based on the same chip.
46 The driver supports both a normal network interface and a raw
47 HIPPI Framing Protocol (HIPPI-FP) device.
48 The HIPPI-FP interface is accessed via the
49 .Pa /dev/esh Ns Sy N/ulp Ns Sy N
50 set of devices. There are 255 available Upper Layer Protocols
51 in FP; these are selectable via the various device entries.
53 HIPPI is an 800-megabit/sec networking technology which supports
54 extremely large packet sizes. In order to efficiently use this
55 network, the kernel should be configured with extra mbufs, and
56 the default socket buffer size should be increased to at least
57 192KB, regardless of the expected bandwidth-delay product of the
60 HIPPI ARP is not widely used, and the
62 stack does not support it
63 (yet). In order to define the mappings between IP addresses and
64 ifields (the HIPPI MAC addresses), the administrator must make
65 link-layer entries in the routing table using the
68 .Bd -unfilled -offset indent
69 route add -interface 129.99.154.101 -llinfo -link esh0:3.0.0.65
73 Media selection is not yet supported for this device.
82 The card must be tuned for proper and efficient DMA operation.
83 The appropriate values vary based on the system.
86 program is used for this.