Specifications

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Features Benefits
Performance-based IP Services
Performance-based packet filtering of inbound and
outbound traffic based on any combination of
matches
§ Source IP address
§ Destination IP address
§ DiffServ byte
§ IP protocol
§ IP fragmentation offset and control fields
(Offset, MF, DF)
§ Source transport port
§ Destination transport port
§ TCP control bits (SYN, ACK, FIN)
You can configure one input filter and one output
filter for each logical interface. You can set multiple
match conditions per filter, as well as configure
multiple actions for each match condition.
§ Maintains predictable performance with filtering enabled.
§ Increases the integrity of source addresses, and therefore reduces
the exposure to source-spoofing attacks.
§ Subscriber protection via outbound destination filters.
§ Traffic accounting via filter categorization and counters.
Performance-based packet sampling
§ Statistical sampling at a configurable rate
§ Sampled data is stored locally on 6.4-GB
Routing Engine hard disk drive
§ Maintains predictable performance with sampling enabled.
§ High degree of fine granularity when used in conjunction with
filtering.
§ Provides visibility into traffic type for online analysis (for example,
applications and histograms of packet sizes).
§ Helps with capacity planning and network design.
§ Customizable raw data archive of sampled headers for off-line
analysis. You can use this information for AS-to-AS and prefix-to-
prefix analysis.
Deterministic per-packet load balancing for load
sharing across multiple circuits
§ Maintains predictable performance with load balancing enabled.
§ Improved load sharing across parallel equal-cost paths in the
network.
§ Packet ordering within each TCP flow enables optimal throughput.
Support for Label Distribution Protocol (LDP) IETF
draft (draft-ietf-mpls-ldp-05.txt) and support for
optional features
§ Upstream unsolicited label distribution
discipline
§ Liberal label retention mode
§ Neighbor discovery
§ Provides interoperability with access devices that use LDP (for
example, tunneling of virtual private network traffic).
§ Supports a core IP network that does not carry full Internet routes
and where traffic engineering is not required.
Class of Service
Token bucket mechanism on SONET/SDH
interfaces
§ Enables you to perform rate policing on input.
Four queues per physical interface
§ Enables you to classify all out-bound traffic into four distinct groups.
Classification based on incoming logical interface,
IP precedence value, or destination IP address
§ Provides preferential traffic handling.
Weighted Round Robin queue servicing based on
configurable weights
§ Enables you to assign a percentage of bandwidth to each class.
§ Controls the amount of bandwidth each class receives on a circuit,
thereby ensuring that heavy traffic demands of some classes do not
adversely affect other classes.
§ Provides preferential traffic handling.
Random Early Detection congestion management
§ Reduces the probability that congestion will occur.
§ Minimizes packet loss and delay.
§ Maximizes TCP throughput.
§ Maximizes the utilization of links over time.
§ Provides preferential traffic handling
Configurable memory allocated to each queue
§ Gives more control over minimizing latency and the potential for
congestion by configuring the amount of available bandwidth.