Optimized Edge Routing
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Cisco IOS XE Release 2.6.1, Cisco IOS XE Release 3.1S
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OER was introduced. Performance Routing is an extension of OER.
PfR syntax was introduced in Cisco IOS XE Release 3.1S.
The following commands were introduced or modified:
pfr ,
show
pfr
master .
Note
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Only border router functionality is included in the Cisco IOS XE Release 2.6.1 and Cisco IOS XE Release 3.1S releases; no
master controller configuration is available. The master controller that communicates with the Cisco ASR 1000 series routers
being used as a border router must be a router running Cisco IOS Release 15.0(1)M.
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PfR Master Controller support for ASR 1000
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Cisco IOS XE Release 3.3S
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In Cisco IOS XE Release 3.3S and later releases, PfR master controller functionality is supported.
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OER Support for Policy-Rules Configuration
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Cisco IOS XE Release 3.3S
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The OER Support for Policy-Rules Configuration feature introduced the capability to select a PfR map and apply the configuration
under PfR master controller configuration mode, providing an improved method to switch between predefined PfR maps.
The following commands were introduced or modified by this feature:
policy-rules (PfR).
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expire
after
command1
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Cisco IOS XE Release 3.3S
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Theexpire
after (PfR) command is used to set an expiration period for learned prefixes. By default, the master controller removes inactive
prefixes from the central policy database as memory is needed. This command allows you to refine this behavior by setting
a time or session based limit. The time based limit is configured in minutes. The session based limit is configured for the
number of monitor periods (or sessions).
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OER Active Probe Source Address
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Cisco IOS XE Release 3.3S
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The OER Active Probe Source Address feature allows you to configure a specific exit interface on the border router as the
source for active probes.
The
active-probe
address
source (PfR) command was introduced by this feature.
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OER Application-Aware Routing: PBR
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Cisco IOS XE Release 3.3S
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The OER Application-Aware Routing: PBR feature introduces the capability to optimize IP traffic based on the type of application
that is carried by the monitored prefix. Independent policy configuration is applied to the subset (application) of traffic.
The following commands were introduced or modified by this feature:
debug
pfr
border
pbr ,
debug
pfr
master
prefix ,
match
ip
address
(PfR) ,show
pfr
master
active-probes , and
show
pfr
master
appl .
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OER DSCP Monitoring
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Cisco IOS XE Release 3.3S
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OER DSCP Monitoring introduced automatic learning of traffic classes based on protocol, port numbers, and DSCP value. Traffic
classes can be defined by a combination of keys comprising of protocol, port numbers, and DSCP values, with the ability to
filter out traffic that is not required, and the ability to aggregate the traffic in which you are interested. Layer 4 information
such as protocol, port number, and DSCP information is now sent to the master controller database in addition to the Layer
3 prefix information. The new functionality allows PfR to both actively and passively monitor application traffic.
The following commands were introduced or modified by this feature:
show
pfr
border
passive
applications ,show
pfr
border
passive
cache ,
show
pfr
border
passive
learn ,
show
pfr
master
appl ,
traffic-class
aggr
egation
(PfR) ,
traffic-class
filter
(PfR) , and
traffic-class
key
s
(PfR) .
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Performance Routing - Link Groups
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Cisco IOS XE Release 3.3S
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The Performance Routing - Link Groups feature introduces the ability to define a group of exit links as a preferred set of
links, or a fallback set of links for PfR to use when optimizing traffic classes specified in a PfR policy.
The following commands were introduced or modified by this feature:
link-group
(PfR) ,
set
link-group
(PfR) , and
show
pfr
master
link-group .
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Support for Fast Failover Monitoring2
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Cisco IOS XE Release 3.3S
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Fast Failover Monitoring introduced the ability to configure a fast monitoring mode. In fast failover monitoring mode, all
exits are continuously probed using active monitoring and passive monitoring. The probe frequency can be set to a lower frequency
in fast failover monitoring mode than for other monitoring modes, to allow a faster failover capability. Fast failover monitoring
can be used with all types of active probes: ICMP echo, jitter, TCP connection, and UDP echo.
The following commands were modified by this feature:
mode
(PfR) ,
set
mode
(PfR) .
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