Cisco Cisco IOS XR Software Release 4.0

There are no workarounds for set-actions for qos-group/discard-class for BVI traffic. For L2->BVI 
path, DSCP of the packet could be modified using an ingress policy, which would set exp based on 
the modified DSCP. 

Cisco IOS XR software is installed and activated from modular packages, allowing specific features or 
software patches to be installed, upgraded, or downgraded without affecting unrelated processes. 
Software packages can be upgraded or downgraded on all supported card types, or on a single card 
(node). 

Software packages are installed from package installation envelope (PIE) files that contain one or more 
software components. Refer to 

Table 1

 for a list of the Cisco ASR 9000 Series Router software feature 

set matrix (PIE files) and associated filenames available for the Cisco IOS XR Software Release 4.0.3 
supported on the Cisco ASR 9000 Series Router.

The following URL contains links to information about how to upgrade Cisco IOS XR software:

For information on troubleshooting Cisco IOS XR software, see the 
Cisco ASR 9000 Series Aggregation Services Routers Getting Started Guide and the Cisco ASR 9000 
Series Router Troubleshooting Feature Module.

In some very rare cases inconsistencies in the content of the internal configuration files can 
appear. In such situations, to avoid configuration loss during upgrade, the following steps can be 
optionally done before activating packages:

Clear the NVGEN cache:

RP/0/RSP0/CPU0:PE44_ASR-9010# run nvgen –F 1

Create a dummy config commit:

RP/0/RSP0/CPU0:PE44_ASR-9010# config

RP/0/RSP0/CPU0:PE44_ASR-9010(config)# hostname <hostname>

RP/0/RSP0/CPU0:PE44_ASR-9010(config)# commit

RP/0/RSP0/CPU0:PE44_ASR-9010(config)# end

Force a commit update by using the reload command. Press “n” when the confirmation prompt 
appears:

RP/0/RSP0/CPU0:PE44_ASR-9010# reload

Updating Commit Database. Please wait...[OK]

Proceed with reload? [confirm] 

Press “n”.

In some cases other activity may preclude a reload. The following message may display: