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Glossary
GL-4
Cisco ASR 1000 Series Aggregation Services Routers Hardware Installation and Initial Configuration Guide
OL-13208-03
FPD
Field-programmable device. General term for any hardware component implemented on router cards
that supports separate software upgrades. SIPs and SPAs must have the right FPD version to function
properly; an FPD incompatibility will disable all interfaces on the SPA or all SPAs within the SIP.
FPD image package
Used to upgrade FPD images. Whenever a Cisco IOS image is released that supports SPAs, a
companion SPA FPD image package is also released for that Cisco IOS software release.
FPDS
Forwarding Path Data Structures
FRU
Field-replaceable unit
G
GEC
Gigabit Ether Channel. This is the logical aggregation of gigabit ethernet links for resiliency and load
sharing as defined in the 802.3ad protocol.
GRE
Generic Route Encapsulation
H
HQF
Hierarchical Queuing Framework
H.248
A VoIP signaling protocol, usually used between a dumb device and a clever controller. It is similar in
functionality to Media Gateway Control Protocol (MGCP). It is used to communicate between SBC and
DBE in a distributed SBC system.
HH
Half height shared port adapters
I
IOCP
IO Control Processor. General purpose CPU managing the SPA’s.
IOS
Internetworking Operating System
IOSD
This refers to IOS daemon running as a process under Linux on the ASR1000- RP1. IOSD is the IOS
process on IOS-SR. The bulk of the control plane, all routing protocols, configuration file management
and so on all are the domain of IOSD.
IOS-SR
The Linux-based software infrastructure running on the Cisco ASR1000 series routers.
IPC
Inter Process Communication. Any method of passing data between processes running in separate
address spaces.
ISSU
In service software upgrade. This refers to a software upgrade when the system is in use. This allows
for two distinct versions of software running on a pair for ASR1000-RP1s while allowing for stateful
switchover between the ASR1000-RP1s.