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 compone nt 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 fo r 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 o n 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 ASR10 00-RP1s while allowing for stateful
switchover between the ASR1000-RP1s.