Router Gets RESTART

[sheraz butt]

HI all,

    I need some help i have router 1900 with NAT but its getting restart when i sh logg i can see this error.

%IFMGR-7-NO_IFINDEX_FILE: Unable to open nvram:/ifIndex-table No such file or directory

Full logg 

*Jul 4 20:03:38.599: %IFMGR-7-NO_IFINDEX_FILE: Unable to open nvram:/ifIndex-table No such file or directory
*Jul 4 20:03:47.835: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Jul 4 20:03:47.835: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up
*Jul 4 20:03:49.019: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up
*Jul 4 20:03:49.019: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up
*Jul 4 20:03:50.891: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel10, changed state to down
*Jul 4 20:03:50.915: %LINEPROTO-5-UPDOWN: Line protocol on Interface NVI0, changed state to up
*Jul 4 20:03:55.575: %SYS-5-CONFIG_I: Configured from memory by console
*Jul 4 20:03:58.127: %SYS-5-RESTART: System restarted --
Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.0(1)M4, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Thu 28-Oct-10 16:26 by prod_rel_team

Any help please

[Philip D'Ath · Accepted solution]

That file is used by "snmp-server ifindex persist".  Perhaps try removing that line and re-adding it to your router.

I would also recommend you upgrade the software on your router to the gold star release 15.4.3M5.

https://software.cisco.com/download/release.html?mdfid=282774238&flowid=714&softwareid=280805680&release=15.4.3M5&relind=AVAILABLE&rellifecycle=MD&reltype=latest