12000 Series Gigabit Switch Routers - Cisco RJ-45-to-AUX Brochure

The MGX 8800 RPM also supports MPLS. It can act as a label edge router or label switch router. It also
supports MPLS−VPNs via mulitprotocol BGP extentions, VPN route−target extended BGP community
attributes, MPLS forwarding across backbone, and multiple routing/forwarding instances on the provider edge
router.
As mentioned earlier, the Route Processor Module has an ATM deluxe port adaptor interface to the chassis
backplane.
Advanced traffic management features are as follows:
ATM service classes: nrt−VBR, ABR, and UBR
Traffic shaping (per VC)
High−performance architecture
Extended VC capabilities
Up to 4,096 VCs
Up to 200 concurrent segmentation and reassemblies (SARs)
ATM adaptation layer 5 (AAL5) for data traffic
Advanced traffic management mechanisms in the ATM port adaptor (PA) architecture allow for the support of
bursty, client/server traffic, while supporting applications that require guaranteed or best−effort service. The
ATM PA traffic management capabilities—based on ATM Forum specifications—surpass those of any
existing ATM interface in high−end routers.

12000 Series Gigabit Switch Routers

The 12000 series Gigabit Switch Router (GSR) is designed and developed for the core of service provider and
enterprise IP backbones. The Cisco 12000 GSR family includes three models:
12008—An eight−slot chassis switch that can be used to support up to 84 DS3, 28 OC−3c/STM−1c,
and 28 OC−12c/STM−4c or 7 OC−48c/STM−16c interfaces
12012—Has 12 slots that can be used to support up to 132 DS3, 44 OC−3c/STM−1c, 44
OC−12c/STM−4c, or 11 OC−48c/STM−16c interfaces
12016—The new 5Tbps GSR terabit system, which has 16 slots that can be used to support up to 180
DS3, 60 OC−3c/STM−1c, and 60 OC−12c/STM−4c or 15 OC−48c/STM16c interfaces, with support
for 15 OC−192c/STM−64c interfaces in the future
You may wonder why a router is being featured in a book about switches. The 12000 series belongs in this
book because of its integrated switching fabric. At the heart of the Cisco 12000 GSR is a multigigabit crossbar
switch fabric that is optimized to provide high−capacity switching at gigabit rates.
The crossbar switch enables high performance for two reasons: Connections from the LCs to a centralized
fabric are point−to−point links that can operate at very high speeds; and, multiple bus transactions can be
supported simultaneously, increasing the aggregate bandwidth of the system. A GSR system can be
configured as 40Gbps for the 12008, 60Gbps for the 12012, and 80Gbps for the 12016, scalable to 5 terabits.
The switch fabric includes two card types: switch−fabric cards (SFCs) and clock and scheduler cards (CSC).
Each GSR must have at least one CSC in the chassis. The SFCs receive the scheduling information and
clocking reference from the CSC cards and perform the switching functions.
The Gigabit Route Processor (GRP) is a high−performance engine that provides the routing intelligence for
the 12000 GSR family. It is dedicated to determining the network topology and calculating the best path
across the network. The GRP has the following hardware characteristics:
200MHz R5000 CPU
Optionally, up to 256MB CPU DRAM (default 128MB)
512K Layer 2 cache
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