Cisco Cisco IOS XR Software Release 4.2

On rare occassions, during Cisco IOS XR Software Release 4.2.0 testing, we have observed issues 
while making bulk configuration changes (1000+ lines) in a single configuration (Using copy 
(remote) running, commit replace and rollback.) We recommend that you archive configurations 
before executing bulk configuration changes on this scale in Cisco IOS XR Software Release 4.2.0.  
This way you can easily retry or compare results.

Caveats describe unexpected behavior in Cisco IOS XR Software releases. Severity-1 caveats are the 
most serious caveats; severity-2 caveats are less serious.

This section lists the caveats for Cisco ASR 9000 Series Aggregation Services Router Software Release 
4.2 and the Cisco ASR 9000 Series Aggregration Services Router platform.

The following open caveats apply to Cisco IOS XR Software Release  and are not platform specific:

420-PSI: After router reload, new configuration is not applied.

When performing a commit replace, a syslog similar to the following is displayed:

RP/0/RSP0/CPU0:Dec 20 05:02:45.555 : sysdb_mc[399]: %SYSDB-SMC-7-TIMEOUT : Message 

#0x200088ed state:0x13fe5326, gid(1009),destined for all local, timed out having 

received 7 of 8 expected responses: returning received responses to client config. 

Check for potential transport issues within the system, or deadlocked SysDB processes.

 

Following a router reload or LC OIR, configuration that had been previously removed by the 
commit replace operation reappears in the active running configuration.

The following two conditions are the reasons:

The configuration that is being replaced is either,

larger than 20MB (ASCII), or

over 100,000 interfaces on a single LC

The configuration changes involves a Viking RSP3 LC with the following types:

0/1/CPU0        A9K-MOD80-SE              IOS XR RUN       PWR,NSHUT,NMON

0/5/CPU0        A9K-24x10GE-SE            IOS XR RUN       PWR,NSHUT,MON

0/0/CPU0        A9K-8T/4-E                IOS XR RUN       PWR,NSHUT,MON

0/4/CPU0        A9K-2T20GE-E              IOS XR RUN       PWR,NSHUT,MON

0/5/CPU0        A9K-2x100GE-TR            IOS XR RUN       PWR,NSHUT,MON

0/6/CPU0        A9K-24x10GE-SE            IOS XR RUN       PWR,NSHUT,MON

0/7/CPU0        A9K-4T-E                  IOS XR RUN       PWR,NSHUT,MON