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NetBSD 6.1.5 - man page for esh (netbsd section 4)

ESH(4)				   BSD Kernel Interfaces Manual 			   ESH(4)

     esh -- RoadRunner-based HIPPI interfaces device driver

     esh* at pci? dev ? function ?

     The esh device driver supports the Essential Communications RoadRunner-based HIPPI inter-
     faces.  With some modifications, the driver could be made to support the Gigabit Ethernet
     card based on the same chip.

     The driver supports both a normal network interface and a raw HIPPI Framing Protocol (HIPPI-
     FP) device.  The HIPPI-FP interface is accessed via the /dev/eshN/ulpN set of devices.
     There are 255 available Upper Layer Protocols in FP;  these are selectable via the various
     device entries.

     HIPPI is an 800-megabit/sec networking technology which supports extremely large packet
     sizes.  In order to efficiently use this network, the kernel should be configured with extra
     mbufs, and the default socket buffer size should be increased to at least 192KB, regardless
     of the expected bandwidth-delay product of the network.

     HIPPI ARP is not widely used, and the NetBSD stack does not support it (yet).  In order to
     define the mappings between IP addresses and ifields (the HIPPI MAC addresses), the adminis-
     trator must make link-layer entries in the routing table using the route(8) command:

	   route add -interface -llinfo -link esh0:

     Media selection is not yet supported for this device.

     intro(4), pci(4), eshconfig(8), ifconfig(8), route(8)

     The card must be tuned for proper and efficient DMA operation.  The appropriate values vary
     based on the system.  The eshconfig(8) program is used for this.

BSD					 January 28, 1998				      BSD

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