Примечания к выпуску для Cisco Cisco IOS XR Software Release 4.0
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Release Notes for Cisco XR 12000 Series Router for Cisco IOS XR Software Release 4.0.3
OL-24345-01
Important Notes
Important Notes
•
Default timestamp setting—The timestamp prompt that precedes console output is enabled by
default in Cisco IOS XR Release 3.8. To disable the timestamp prompt, use the no service
timestamp command. For more information, refer to the Cisco IOS XR System Management
Command Reference for the Cisco XR 12000 Series Router.
default in Cisco IOS XR Release 3.8. To disable the timestamp prompt, use the no service
timestamp command. For more information, refer to the Cisco IOS XR System Management
Command Reference for the Cisco XR 12000 Series Router.
•
From Cisco IOS XR Software Release 3.6.0, WRED statements are collapsed in that if different
random-detect statements using the same match types (EXP, DSCP, Prec, and so forth) are entered
with identical minimum and maximum threshold values, a single configuration line is shown in the
output of show running config. This reduces the length of the configuration but creates a problem
with backward compatibility with previous releases. In such a situation, on rollback, the QoS policy
is rejected and must be manually entered again.
random-detect statements using the same match types (EXP, DSCP, Prec, and so forth) are entered
with identical minimum and maximum threshold values, a single configuration line is shown in the
output of show running config. This reduces the length of the configuration but creates a problem
with backward compatibility with previous releases. In such a situation, on rollback, the QoS policy
is rejected and must be manually entered again.
Configuration prior to Cisco IOS XR Software Release 3.6.0:
Policy-map wred_example
Class class-default
random-detect exp 0 384 packets 484 packets
random-detect exp 1 384 packets 484 packets
random-detect exp 2 384 packets 484 packets
random-detect exp 3 484 packets 584 packets
random-detect exp 4 484 packets 584 packets
random-detect discard-class 0 384 packets 484 packets
random-detect discard-class 1 384 packets 484 packets
random-detect discard-class 2 484 packets 584 packets
bandwidth remaining percent 20
Cisco IOS XR Software Release 3.6.0 and later releases:
policy-map wred_example
class class-default
random-detect exp 0,1,2 384 packets 484 packets
random-detect exp 3,4 484 packets 584 packets
random-detect discard-class 0,1 384 packets 484 packets
random-detect discard-class 2 484 packets 584 packets
bandwidth remaining percent 20
!
end-policy-map
!
end
In Cisco IOS XR Software Release 3.6.0 and later releases, the implicitly assigned QoS class
class-default must have at least 1 percent bandwidth made available to it. This can be done either by
assigning at least 1 percent explicitly (bandwidth remaining percent 1) or by ensuring that the total
bandwidth assigned to all other classes in the policy is a maximum of 99 percent, leaving 1 percent
available for the class-default. A QoS policy that does not have any bandwidth for class-default is
rejected when upgrading to Cisco IOS XR Software Release 3.6.0 or later releases.
class-default must have at least 1 percent bandwidth made available to it. This can be done either by
assigning at least 1 percent explicitly (bandwidth remaining percent 1) or by ensuring that the total
bandwidth assigned to all other classes in the policy is a maximum of 99 percent, leaving 1 percent
available for the class-default. A QoS policy that does not have any bandwidth for class-default is
rejected when upgrading to Cisco IOS XR Software Release 3.6.0 or later releases.
•
Country-specific laws, regulations, and licences—In certain countries, use of these products may
be prohibited and subject to laws, regulations, or licenses, including requirements applicable to the
use of the products under telecommunications and other laws and regulations; customers must
comply with all such applicable laws in the countries in which they intend to use the products.
be prohibited and subject to laws, regulations, or licenses, including requirements applicable to the
use of the products under telecommunications and other laws and regulations; customers must
comply with all such applicable laws in the countries in which they intend to use the products.
•
Migrating from Cisco IOS to Cisco IOS XR Software on the
Cisco XR 12000 Series Router—When migrating a Cisco XR 12000 Series Router from
Cisco IOS to Cisco IOS XR software, follow the instructions provided in Migrating from Cisco IOS
to Cisco IOS XR Software on the Cisco XR 12000 Series Router.
Cisco XR 12000 Series Router—When migrating a Cisco XR 12000 Series Router from
Cisco IOS to Cisco IOS XR software, follow the instructions provided in Migrating from Cisco IOS
to Cisco IOS XR Software on the Cisco XR 12000 Series Router.