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Command or Action |
Purpose |
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enable
Example:
Router> enable
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Enables privileged EXEC mode.
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Enter your password if prompted.
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configure terminal
Example:
Router# configure terminal
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Enters global configuration mode. |
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ip prefix-list list-name [seq seq-value] {deny network / length| permit network / length} [le le-value]
Example:
Router(config)# ip prefix-list OER seq 10 permit 10.4.9.0/24
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Creates an IP prefix list.
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IP prefix lists are used to manually select prefixes for monitoring by the master controller.
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A master controller can monitor and control an exact prefix of any length including the default route. If an exact prefix is specified, OER monitors only the exact prefix.
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A master controller can monitor and control an inclusive prefix using the le keyword set to 32. OER monitors the configured prefix and any more specific prefixes (for example, configuring the 10.0.0.0/8 le 32 prefix would include the 10.1.0.0/16 and the 10.1.1.0/24 prefixes) over the same exit and records the information in the routing information base (RIB).
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The prefixes specified in the IP prefix list are imported into the OER map with the match ip address (OER) command.
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The example creates an exact IP prefix list that permits prefixes only from the 10.4.9.0/24 subnet.
Note |
Only the syntax applicable to OER is shown. For more details, see the Cisco IOS IP Routing Protocols Command Reference. |
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ip access-list {standard | extended} access-list-name
Example:
Router(config)# ip access-list extended VOICE_ACCESS_LIST
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Defines an IP access list by name.
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OER supports only named access lists.
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The example creates an extended IP access list named VOICE_ACCESS_LIST.
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[sequence-number] permit udp source source-wildcard [operator [port]] destination destination-wildcard [operator [port]] [dscp dscp-value]
Example:
Router(config-ext-nacl)# permit udp any range 16384 32767 10.20.20.0 0.0.0.15 range 16384 32767
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Sets conditions to allow a packet to pass a named IP access list.
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The example is configured to identify all UDP traffic ranging from a destination port number of 16384 to 32767 from any source to a destination prefix of 10.20.20.0/24. This specific UDP traffic is to be optimized.
Note |
Only the syntax applicable to this task is shown. For more details, see the Cisco IOS IP Application Services Command Reference. |
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exit
Example:
Router(config-ext-nacl)# exit
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Exits extended access list configuration mode and returns to global configuration mode. |
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oer-map map-name sequence-number
Example:
Router(config)# oer-map FINANCE 10
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Enters OER map configuration mode to configure an OER map to apply policies to selected IP prefixes.
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Only one match clause can be configured for each OER map sequence.
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Permit sequences are first defined in an IP prefix list and then applied with the match ip address (OER) command in Step 8.
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The example creates an OER map named FINANCE.
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match ip address {access-list access-list-name| prefix-list prefix-list-name}
Example:
Router(config-oer-map)# match ip address prefix-list OER
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References an extended IP access list or IP prefix list as match criteria in an OER map.
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Only a single match clause can be configured for each OER map sequence.
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The example configures the prefix list named OER as match criteria in an OER map.
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set backoff min-timer max-timer [step-timer]
Example:
Router(config-oer-map)# set backoff 400 4000 400
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Creates a set clause entry to configure the backoff timer to adjust the time period for traffic class entry policy decisions.
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The min-timer argument is used to set the minimum transition period in seconds.
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The max-timer argument is used to set the maximum length of time OER holds an out-of-policy traffic class entry when there are no OER controlled in-policy traffic classes.
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The step-timer argument allows you to optionally configure OER to add time each time the minimum timer expires until the maximum time limit has been reached.
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The example creates a set clause to configure the minimum timer to 400 seconds, the maximum timer to 4000 seconds, and the step timer to 400 seconds for traffic that is matched in the same OER map sequence.
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set delay {relative percentage | threshold maximum}
Example:
Router(config-oer-map)# set delay threshold 2000
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Creates a set clause entry to configure the delay threshold.
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The delay threshold can be configured as a relative percentage or as an absolute value for match criteria.
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The relative keyword is used to configure a relative delay percentage. The relative delay percentage is based on a comparison of short-term and long-term measurements.
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The threshold keyword is used to configure the absolute maximum delay period in milliseconds.
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The example creates a set clause that sets the absolute maximum delay threshold to 2000 milliseconds for traffic that is matched in the same OER map sequence.
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set loss {relative average | threshold maximum}
Example:
Router(config-oer-map)# set loss relative 20
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Creates a set clause entry to configure the relative or maximum packet loss limit that the master controller will permit for an exit link.
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This command is used within an OER map to configure the relative percentage or maximum number of packets that OER will permit to be lost during transmission on an exit link. If packet loss is greater than the user-defined or the default value, the master controller determines that the exit link is out-of-policy.
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The relative keyword is used to configure the relative packet loss percentage. The relative packet loss percentage is based on a comparison of short-term and long-term packet loss.
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The thresholdkeyword is used to configure the absolute maximum packet loss. The maximum value is based on the actual number of packets per million that have been lost.
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The example creates a set clause that configures the relative percentage of acceptable packet loss to less than 20 percent for traffic that is matched in the same OER map sequence.
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set periodic timer
Example:
Router(config-oer-map)# set periodic 300
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Creates a set clause entry to configure the time period for the periodic timer.
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When this command is enabled, the master controller will periodically evaluate and then make policy decisions for traffic classes, even if they are currently in-policy.
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The set mode select-exit command in Step 21 is used to determine if OER selects the first in-policy exit or the best available exit when this timer expires.
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The example creates a set clause that configures the periodic timer to 300 seconds for traffic that is matched in the same OER map sequence.
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set unreachable {relative average | threshold maximum}
Example:
Router(config-oer-map)# set unreachable relative 10
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Creates a set clause entry to configure the maximum number of unreachable hosts.
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This command is used to specify the relative percentage or the absolute maximum number of unreachable hosts, based on flows per million (fpm), that OER will permit for a traffic class entry. If the absolute number or relative percentage of unreachable hosts is greater than the user-defined or the default value, OER determines that the traffic class entry is OOP and searches for an alternate exit link.
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The relative keyword is used to configure the relative percentage of unreachable hosts. The relative unreachable host percentage is based on a comparison of short-term and long-term measurements.
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The thresholdkeyword is used to configure the absolute maximum number of unreachable hosts based on fpm.
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The example creates a set clause entry that configures the master controller to search for a new exit link for a traffic class entry when the relative percentage of unreachable hosts is equal to or greater than 10 percent for traffic learned based on highest delay.
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exit
Example:
Router(config-oer-map)# exit
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(Optional) Exits OER map configuration mode and returns to global configuration mode. |
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oer-map map-name sequence-number
Example:
Router(config)# oer-map VOICE_MAP 10
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Enters OER map configuration mode to configure an OER map to apply policies to selected IP traffic classes.
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Only one match clause can be configured for each OER map sequence.
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Deny sequences are first defined in an IP prefix list and then applied with the match ip address (OER) command in Step 16.
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The example creates an OER map named VOICE_MAP.
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match ip address {access-list access-list-name| prefix-list prefix-list-name}
Example:
Router(config-oer-map)# match ip address access-list VOICE_ACCESS_LIST
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References an extended IP access list or IP prefix list as match criteria in an OER map.
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Only a single match clause can be configured for each OER map sequence.
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The example configures the IP access list named VOICE_ACCESS_LIST as match criteria in an OER map.
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set active-probe probe-type ip-address [target-port number] [codec codec-name]
Example:
Router(config-oer-map)# set active-probe jitter 10.20.22.1 target-port 2000 codec g729a
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Creates a set clause entry to assign a target prefix for an active probe.
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The echo keyword is used to specify the target IP address of a prefix to actively monitor using Internet Control Message Protocol (ICMP) echo (ping) messages.
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The jitter keyword is used to specify the target IP address of a prefix to actively monitor using jitter messages.
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The tcp-conn keyword is used to specify the target IP address of a prefix to actively monitor using Internet Control Message Protocol (ICMP) echo (ping) messages.
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The udp-echo keyword is used to specify the target IP address of a prefix to actively monitor using Internet Control Message Protocol (ICMP) echo (ping) messages.
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The example creates a set clause entry to specify the target IP address of a prefix and a specific port number to actively monitor using jitter.
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set probe frequency seconds
Example:
Router(config-oer-map)# set probe frequency 10
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Creates a set clause entry to set the frequency of the OER active probe.
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The seconds argument is used to set the time, in seconds, between the active probe monitoring of the specified IP prefixes.
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The example creates a set clause to set the active probe frequency to 10 seconds.
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set jitter threshold maximum
Example:
Router(config-oer-map)# set jitter threshold 20
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Creates a set clause entry to configure the jitter threshold value.
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The threshold keyword is used to configure the maximum jitter value, in milliseconds.
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The example creates a set clause that sets the jitter threshold value to 20 for traffic that is matched in the same OER map sequence.
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set mos {threshold minimum percent percent}
Example:
Router(config-oer-map)# set mos threshold 4.0 percent 30
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Creates a set clause entry to configure the MOS threshold and percentage values used to decide whether an alternate exit is be selected.
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The threshold keyword is used to configure the minimum MOS value.
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The percent keyword is used to configure the percentage of MOS values that are below the MOS threshold.
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OER calculates the percentage of MOS values below the MOS threshold that are recorded in a five-minute period. If the percentage value exceeds the configured percent value or the default value, the master controller searches for alternate exit links.
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The example creates a set clause that sets the threshold MOS value to 4.0 and the percent value to 30 percent for traffic that is matched in the same OER map sequence.
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set mode select-exit {best | good}
Example:
Router(config-oer-map)# set mode select-exit best
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Creates a set clause entry to configure monitoring, control, or exit selection settings for matched traffic.
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The select-exit keyword is used to configure the master controller to select either the best available exit when the bestkeyword is entered or the first in-policy exit when the good keyword is entered.
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end
Example:
Router(config-oer-map)# end
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Exits OER map configuration mode and enters privileged EXEC mode. |