08-07-2006
Acceptable collisions
Hi All
I have a Sun V120 with eri0 NIC set to 10-Half connected to Fa0/0 on a Cisco 2600 (Fa0/0 also set to 10-Half). I am seeing collisions on this link (as expectd with a 10-Half connection) BUT, what is an acceptable rate of collisions for this type of link?
FYI, the Sun box is showing 2983 collisions for 7363063 Input packets and 8012355 Output packets (About 0.04%) on eri0. The router is showing similar results.
Cheers
Greg
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NG_GIF(4) BSD Kernel Interfaces Manual NG_GIF(4)
NAME
ng_gif -- generic tunnel interface netgraph node type
SYNOPSIS
#include <netgraph/ng_gif.h>
DESCRIPTION
The ng_gif netgraph node type allows gif(4) interfaces to interact with the netgraph(4) networking subsystem. Once the ng_gif module is
loaded in the kernel, a node is automatically created for each gif(4) interface in the system. Each node will attempt to name itself with
the same name as the associated interface. All ng_gif nodes are persistent for as long as the interface itself exists.
Two hooks are supported: lower and orphans. The hook name divert may be used as an alias for lower, and is provided for compatibility with
ng_ether(4). In reality the two names represent the same hook.
The lower hook is a connection to the raw gif(4) device. When connected, all incoming packets are diverted out this hook. Writing to this
hook results in a raw encapsulated packet being transmitted by the device. Normal outgoing packets are not affected by lower being con-
nected.
The orphans hook is equivalent to lower, except that only unrecognized packets (that would otherwise be discarded) are written to the hook,
and normal incoming traffic is unaffected. At most one of orphans and lower may be connected at any time.
In all cases, frames are raw packets with the address family of the packet attached to the front.
When no hooks are connected, packets flow normally upwards and downwards.
HOOKS
This node type supports the following hooks:
lower Connection to the lower device link layer.
orphans Like lower, but only receives unrecognized packets.
CONTROL MESSAGES
This node type supports only the generic control messages.
EXAMPLES
This command dumps all unrecognized packets received by the gif0 interface to standard output decoded in hex and ASCII:
nghook -a gif0: orphans
SEE ALSO
gif(4), netgraph(4), netintro(4), ifconfig(8), ngctl(8), nghook(8)
AUTHORS
Brooks Davis <brooks@FreeBSD.org>
BSD
September 18, 2001 BSD