Chassis Overview
The Cisco CRS 8-slot Line Card Chassis router supports 40 G, 140 G, and 200 G fabric cards and line cards. The Cisco CRS 8-Slot Line Card Chassis Enhanced router consists of one of the following:
- A single, 8-slot, 40-Gbps-per-slot line-card shelf for a total switching capacity of 640 Gbps
- A single, 8-slot, 140-Gbps-per-slot line-card shelf for a total switching capacity of 2.24 Tbps
- A single, 8-slot, 200-Gbps-per-slot line-card shelf for a total switching capacity of 6.4 Tbps
The 8-slot chassis is a half-height, rack-mounted 8-slot version of the Cisco CRS 16-Slot Line Card Chassis router.
The routing systems are built around a scalable, distributed three-stage switch fabric and a variety of line card (packet) interfaces. These packet interfaces are located on modular services cards (MSCs), forwarding processors (FP), or label switch processor (LSP) cards and their associated physical layer interface modules (PLIMs) which can be referred to as line cards and are effectively cross-connected to each other through the switch fabric. MSC, FP, and LSP cards are also referred to as line cards.
The routing system consists of a single, rack-mounted chassis that contains the system components:
- Up to eight MSC, FP, or LSP line cards.
- Up to eight physical layer interface modules or PLIMs (one for each line card).
- Route processor (RP) cards (up to two) or performance route processor (PRP) cards (up to two)
- Switch fabric cards (four required)
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SPA Interface Processors (SIPs) and Shared Port Adapters (SPAs) which can be installed instead of PLIMs.
- SIP is a carrier card that is similar to a PLIM and inserts into a line card chassis slot and interconnects to a line card like a PLIM does. Unlike PLIMs, SIPs provide no network connectivity on their own.
- SPA is a modular type of port adapter that inserts into a subslot of a compatible SIP carrier card to provide network connectivity and increased interface port density. A SIP can hold one or more SPAs, depending on the SIP type and the SPA size. POS/SDH and Gigabit Ethernet SPAs are available.
- A chassis midplane that connects MSCs, FPs, and LSPs to their PLIMs and to switch fabric cards
The Cisco CRS 8-slot Line Card Chassis router supports 40G, 140G, and 200G fabric cards, as follows:
- The Cisco CRS-1 Carrier Routing System uses fabric cards designed for 40 G operation (CRS-8-FC/S or CRS-8-FC/M cards).
- The Cisco CRS-3 Carrier Routing System uses fabric cards designed for 140G operation (CRS-8-FC140/S or CRS-8-FC140/M cards).
- The Cisco CRS-X Carrier Routing System uses fabric cards designed for 200G operation (CRS-8-FC400/S fabric card or CRS-8-FC400/M back-to-back fabric card). For information about the CRS back-to-back system, see Introduction to the CRS-3 Back-to-Back System.
A mixture of 40G, 140G, and 200G fabric cards is not supported except during migration.
Note |
Throughout this document, the generic term Cisco CRS Carrier Routing system refers to the Cisco CRS-1, Cisco CRS-3, and Cisco CRS-X Carrier Routing Systems, unless otherwise specified. |