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Features and Benefits
Error-Correcting Code (ECC) Memory that corrects errors on the fly
Weighted Random Early
Detection (WRED)
Congestion control or query management; allows selective discard of low-priority
flows before dropping packets from higher-priority flows
Modified Deficit Round
Robin (MDRR)
Uses class-based packet queuing to control the packet dequeuing process in a
manner that allows the users to guarantee transit latency for differentiated flows
Table 2 Features and Benefits Summary for the Three-Port Gigabit Ethernet Line Card
Features Benefits
IEEE 802.3z Standards Compliant Used to connectto Gigabit Ethernet switchesor Gigabit Ethernet
IP port adapter of Cisco 7500 router
Standardized on GBIC Module Interfaces
(1000BASE-SX 550 meters, multimode and
1000BASE-LH 10 km, single mode, and
1000BASE-ZX, single mode 70 km)
Provides flexibility in network design with reach capability up to
70 km; hot-swappable GBIC unit enables change/replacement
without the need to power down the line card
Supports IEEE 802.1q VLAN Tagging Gigabit Ethernet link can be used as a VLAN trunk
Support for IP QoS/CoS, Including ACL and
MPLS/Tag Switching
Enables traffic engineering solutions to increase network
utilization and provide basis for offering differentiated CoS
models
128-MB Packet Buffer Memory and 512-KB Burst
Buffers for Each Rx and Tx Direction, Upgradable
to 256-MB for Each Direction
Maximizes TCP/IP throughput and smoothes out all traffic bursts
Forwarding Table with up to One Million
Forwarding Entries
Allows for phenomenal growth well beyond today's Internet
with 40,000 route entries
Minimum Very Long Reach (ZX) Link Power
Budget Parameter
10um SMF UNit Link Power Budget 21-db; operating distance
70,000 meter
ECC Memory that corrects errors on the fly
WRED Congestion control or query management; allows selective
discard of low-priority flows before dropping packets from
higher-priority flows
MDRR Uses class-based packet queuing to control the packet
dequeuing process in a manner that allows the users to
guarantee transit latency for differentiated flows
Table 1 Software Features for the Three-Port Gigabit Ethernet Line Card
Features Benefits
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