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ESH(4) NetBSD Kernel Interfaces Manual ESH(4)
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Maintained for NetBSD
by Kimmo Suominen.
Based on man-cgi by Panagiotis Christias.
esh -- RoadRunner-based HIPPI interfaces device driver
esh* at pci? dev ? function ?
The esh device driver supports the Essential Communications RoadRunner-
based HIPPI interfaces. 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 Fram-
ing 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 administrator must make link-layer entries
in the routing table using the route(8) command:
route add -interface 220.127.116.11 -llinfo -link esh0:18.104.22.168
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.
NetBSD 9.0 January 28, 1998 NetBSD 9.0