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

[Aaron]

Oh nice,
http://www.cisco.com/en/US/docs/routers/asr9000/software/asr9k_r4.0/addr_ser
v/command/reference/b_ir40asrbook_chapter_01000.html#wp3657491863

So with "static" I wouldn't have had that problem yesterday. ?  it says
static " Keeps the existing interface running across new address
configurations."

Aaron

-----Original Message-----
From: Adam Vitkovsky [mailto:adam.vitkovsky at swan.sk] 
Sent: Wednesday, August 14, 2013 9:28 AM
To: 'Aaron'; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] overlapping ip onflict - IOS XR - forces interfaces
down

Oh yes,
I don't understand why "ipv4 conflict-policy static" and "ipv6
conflict-policy static" is not part of the default configuration The default
behavior makes no sense. 


adam
-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
Aaron
Sent: Wednesday, August 14, 2013 3:23 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] overlapping ip onflict - IOS XR - forces interfaces down

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

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