Cisco 12000 3-Port Gigabit Ethernet Line Card 3GE-GBIC-SC= 데이터 시트

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Cisco

 Internet Router

Three-Port Gigabit Ethernet Line Card

Cisco offers the three-port Gigabit Ethernet

line card (part number 3GE-GBIC-SC(=))

for the Cisco 12000 series family of

Internet routers to address the needs for

interconnecting devices within points of

presence (POPs) at gigabit rates. The

three-port Gigabit Ethernet line card is the

second Ethernet-based product for the

Cisco 12000 series family of Internet

routers, providing a cost-effective,

high-bandwidth solution. This compelling

solution is sought by Internet service

providers (ISPs) with large Web hosting

equipment such as servers, caches, edge

routers, Gigabit Ethernet switches, and so

on, who are looking for cost-effective links

between their Cisco 12000 series platforms

and other network equipment.

This new line card, depicted in Figure 1, can

be configured with up to three of the

following interface types: a 1000BASE-SX

multimode fiber interface with up to a

550-meter reach, a 1000BASE-LH

single-mode fiber interface with up to a

10-km reach, or a 1000BASE-ZX

single-mode fiber interface with up to a

70-km reach.

• Layer 3 quality-of-service (QoS)

support, providing differentiated

services

• Virtual output queues

• Weighted Random Early Detection

(WRED) Modified Deficit Round

Robin (MDRR)

• Application-specific integrated circuit

(ASIC)-based Layer 3 Forwarding and

queuing engine for Internet-scale

performance

• Multiple virtual output queues

optimizing class of service (CoS) by

minimizing latency and eliminating

head-of-line blocking

• A local forwarding table that can

accommodate up to one million

forwarding entries 512-kB burst buffers

in Tx and Rx directions to smooth out

bursty traffic

• 256-MB default packet buffer memory

to maximize TCP goodput

• Scalable up to 512 MB

• Configurable with up to 256 MB of

code and route table memory