A "bay" is a physical insertion point for a single-width, single-height SPA within the SIP. Contrast with a "subslot", which is the location identifier for an installed SPA.
Describes the dimension of a SPA that occupies two vertically-aligned SIP bays.
A double-height SPA occupies bays 0,2 or 1,3
Describes the dimension of a SPA that occupies two horizontally-aligned SIP bays.
A double-width SPA occupies bays 0,1, or 2,3
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
An FPD image package is used to upgrade FPD images. Whenever a Cisco IOS XR image is released that supports SPAs, a companion SPA FPD image package is also released for that Cisco IOS XR software release.
Light Emitting Diode. Electronic devices that emit light when electric current flows through them. LEDs can produce light of any color. SPA LEDs can emit red, amber, or green light.
Online insertion and removal. Feature supported by SIPs and SPAs allowing removal of the cards while the router and the cards are activated, without affecting the operation of other cards or the router. Although this removal can be done while the SIP or SPA is activated, it is generally recommended that you gracefully deactivate the hardware using the appropriate commands for your platform prior to removal of the hardware.
Power Distribution Unit. A PDU is an electrical device used to control the distribution of power to individual loads.
Really Simple Syndication. A family of web feed formats used to publish frequently updated works—such as blog entries, news headlines, audio, and video—in a standardized format.
Small form-factor pluggable optical transceiver. A type of fiber optic receptacle device that mounts flush with the front panel to provide network connectivity.
Describes the dimension of a SPA that occupies a single SIP subslot, or half of the SIP.
SPA interface processor. A SIP is a platform-specific carrier card that inserts into a router slot like a line card. A SIP can hold one or more SPAs in its subslots, depending on the SIP type. The SPA provides the network interface. The SIP provides the connection between the route switch processor (RSP) and the SPA.
Shared port adapter. A SPA is a modular, platform-independent port adapter that inserts into a subslot of a compatible SIP carrier card to provide network connectivity and increased interface port density. The SPA provides the interface between the network and the SIP.
A "subslot" is the location identifier for an installed SPA. Contrast with a "bay", which is a physical insertion point for a single-width, single-height SPA within the SIP.