User Guide

Table Of Contents
PMP 450 Planning Guide Glossary
Term Definition
ICMP Internet Control Message Protocols defined in RFC 792, used to identify Internet
Protocol (IP)-level problems and to allow IP links to be tested. See
http://www.faqs.org/rfcs/rfc792.html
.
indiscards count
Field
How many inbound packets were discarded without errors that would have
prevented their delivery to a higher-layer protocol. (Some of these packets may
have been discarded to increase buffer space.)
inerrors count Field How many inbound packets contained errors that prevented their delivery to a
higher-layer protocol.
innucastpkts count
Field
How many inbound non-unicast (subnetwork-broadcast or subnetwork-multicast)
packets were delivered to a higher-layer protocol.
inoctets count
Field
How many octets were received on the interface, including those that deliver
framing information.
Intel A registered trademark of Intel Corporation.
inucastpkts count
Field
How many inbound subnetwork-unicast packets were delivered to a higher-layer
protocol.
inunknownprotos
count Field
How many inbound packets were discarded because of an unknown or unsupported
protocol.
IP Internet Protocol defined in RFC 791. The Network Layer in the TCP/IP protocol
stack. This protocol is applied to addressing, routing, and delivering, and re-
assembling data packets into the Data Link layer of the protocol stack. See
http://www.faqs.org/rfcs/rfc791.html
.
IP Address 32-bit binary number that identifies a network element by both network and host.
See also Subnet Mask.
IPv4 Traditional version of Internet Protocol, which defines 32-bit fields for data
transmission.
ISM Industrial, Scientific, and Medical Equipment radio frequency band, in the 900-
MHz, 2.4-GHz, and 5.8-GHz ranges.
L2TP over IPSec Level 2 Tunneling Protocol over IP Security. One of several virtual private network
(VPN) implementation schemes. Regardless of whether Subscriber Modules have
the Network Address Translation feature (NAT) enabled, they support VPNs that
are based on this protocol.
Late Collision Field This field displays how many late collisions occurred on the Ethernet controller. A
normal collision occurs during the first 512 bits of the frame transmission. A
collision that occurs after the first 512 bits is considered a late collision. A late
collision is a serious network problem because the frame being transmitted is
discarded. A late collision is most commonly caused by a mismatch between duplex
configurations at the ends of a link segment.
VI
pmp-0047 (March 2014)