ESH(4) BSD Kernel Interfaces Manual ESH(4)
NAME
esh -- RoadRunner-based HIPPI interfaces device driver
SYNOPSIS
esh* at pci? dev ? function ?
DESCRIPTION
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 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 administrator must make link-layer entries in the routing table using the route(8) command:
route add -interface 129.99.154.101 -llinfo -link esh0:3.0.0.65
MEDIA SELECTION
Media selection is not yet supported for this device.
SEE ALSO
intro(4), pci(4), eshconfig(8), ifconfig(8), route(8)
BUGS
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