[c-nsp] overlapping ip onflict - IOS XR - forces interfaces down

[Aaron]

This got me yesterday!  I configured an interface on my asr9000 with an
incorrect mask..the mask overlapped (encompassed) another pre-existing
interface . I guess IOS XR doesn't give you the warning like old IOS about
overlapping networks.look what it did!  .it forced down the other
pre-existing interface.  Then while I was unable to figure out my typo with
the incorrect mask and had not yet look into the logs, but I just knew I had
a bad problem with this core 9k, I simply rolled back config and it fix the
backbone link. then later I found this in the logs.  Thought I'd share with
y'all.

 

RP/0/RSP0/CPU0:Aug 13 16:26:56.586 : ipv4_arm[268]:
%IP-IP_ARM-3-CFLCT_FORCED_DOWN : The IPv4 address 10.101.1.10/30 on
Bundle-Ether2 conflicts with other IPv4 addresses and has been forced down

 

(this is after I did a config rollback)

 

RP/0/RSP0/CPU0:Aug 13 16:46:00.738 : ipv4_arm[268]:
%IP-IP_ARM-6-CFLCT_NO_LONGER : The IPv4 address 10.101.1.10/30 on
Bundle-Ether2 is no longer forced down due to IPv4 address conflicts

 

Aaron