No keep alive and interface down Cisco 1921, bug ?

[Luca Tortiglione]

Good morning,

rm-cpe-laben-5#show ver

Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.1(4)M2, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2011 by Cisco Systems, Inc.

Compiled Mon 26-Sep-11 16:19 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M9, RELEASE SOFTWARE (fc1)

rm-cpe-laben-5 uptime is 1 week, 2 days, 2 hours, 45 minutes

System returned to ROM by power-on

System restarted at 10:00:36 MET Mon Jan 30 2012

System image file is "usbflash0:c1900-universalk9-mz.SPA.151-4.M2.bin"

Last reload type: Normal Reload

rm-cpe-laben-5(config)#interface gigabitEthernet 0/1

rm-cpe-laben-5(config-if)#no ke

rm-cpe-laben-5(config-if)#no keepalive

rm-cpe-laben-5(config-if)#end

rm-cpe-laben-5#show ip int

rm-cpe-laben-5#show ip interface brief

Interface                  IP-Address      OK? Method Status                Protocol

Embedded-Service-Engine0/0 unassigned      YES unset  administratively down down   

GigabitEthernet0/0         xxxxxxxxx     YES manual up                    up     

GigabitEthernet0/1        xxxxxxxxx    YES manual down                  down   

rm-cpe-laben-5#

Is it a bug or it's normal ?

[Bart Smit]

This is due to a bug - CSCtl51328.

For more information about the bug, please visit –

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtl51328

IOS releases in which the bug is fixed –

15.1(04)M3

15.2(2)T

15.0(01)M8

15.1(03)T3

After upgrading the IOS to the any of the above, use the following commands to get the interface up/up.

1. 1921(config)# service internal
2. Go under the interface and –

1921(config)#int gig0/0

1921(config-if)# no keepalive proto-up

[Bart Smit · Accepted solution]

after this however another bug was found: the ISR would not save the command in its configuration.

The issue of not saving ‘no keepalive proto-up’ even after saving the config is due to a bug - CSCtx14349.

For more information, please visit –

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtx14349

The bug CSCtx14349 has been fixed in 15.1.4M4 IOS as well as 15.2(4)T.