Hi,
We had a powercut recently which seemed to cause our router to loose it's subinterface command. Prior to the reboot, this was what was on the system. After the powercut, when I tried to enter the command from a backup config file as Serial0/0/0:1.100 it came up with "% Invalid input detected at '^' marker" and the pointer was starting at teh serial part of the command. It made sense why it wouldn't accept that command because when I did a show ip interface brief, Serial0/0/0:1 didn't exist, only Serial 0/0/0:0.
What I don't seem to understand is how this was accept configuration before, unfortunately I don't have any show ip interface command output from prior to the outage. There doesn't seem to be anything on the logs that show anything useful either.
Outage around 15:00 hrs on 27th
Googled this and there does seem to be some reference to a bug (CSCtg38344) but this only seems to be tied a slightly different scenario and platform.
Version 15.0(1)M1
Cisco CISCO2911/K9
=== configuration before powercut
interface Serial0/0/0:0
no ip address
encapsulation frame-relay IETF
!
interface Serial0/0/0:1.100 point-to-point
description Verizon MPLS
ip address x.x.x.x 255.255.255.252
frame-relay interface-dlci 100 IETF
!
=== configuration that had to be inputed after powercut to bring up the connection to their provider
interface Serial0/0/0:0
no ip address
encapsulation frame-relay IETF
!
interface Serial0/0/0:0.100 point-to-point
description Verizon MPLS VPN
ip address x.x.x.x 255.255.255.252
frame-relay interface-dlci 100 IETF
*Sep 27 13:51:33.679: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Sep 27 13:51:33.679: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up
*Sep 27 13:51:33.679: %LINK-3-UPDOWN: Interface GigabitEthernet0/2, changed state to down
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(1), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(2), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(3), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(4), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(5), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(6), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(7), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(8), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(9), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(10), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(11), changed state to up
*Sep 27 13:51:36.463: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(12), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(13), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(14), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(15), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(16), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(17), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(18), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(19), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(20), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(21), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(22), changed state to up
*Sep 27 13:51:36.467: %LINK-3-UPDOWN: Interface ISDN-VOICE 0/1/0:23(23), changed state to up
*Sep 27 13:51:36.475: %ARP-4-NULL_SRC_MAC: NULL MAC address from 10.62.64.2 on Po1
*Sep 27 13:51:39.079: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 13:51:39.079: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to down
*Sep 27 13:51:39.131: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to down
*Sep 27 13:51:46.271: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up
*Sep 27 13:51:46.395: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up
*Sep 27 13:51:46.835: %MARS_NETCLK-3-CLK_TRANS: Network clock source transitioned from priority 10 to priority 1
*Sep 27 13:51:48.831: %LINK-3-UPDOWN: Interface Serial0/1/0:23, changed state to up
*Sep 27 13:51:55.291: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/2/0, changed state to up
*Sep 27 13:51:55.555: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/2/1, changed state to up
*Sep 27 13:51:55.707: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/2/2, changed state to up
*Sep 27 13:51:55.859: %LINK-3-UPDOWN: Interface Foreign Exchange Office 0/2/3, changed state to up
*Sep 27 13:51:56.831: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 14:56:38.951: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 15:26:28.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 15:29:09.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 15:29:31.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 15:29:32.923: %E1T1_MODULE-3-IBOCLOOPUP: Controller T1 0/0/0 - IBOC loopup code detected, activating line loopback mode.
*Sep 27 15:29:37.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 15:45:46.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 15:45:59.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 15:46:32.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 15:48:11.207: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 17:39:35.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 17:39:43.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 17:40:00.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 17:40:07.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 17:40:40.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 17:40:47.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 17:40:59.683: %E1T1_MODULE-3-IBOCLOOPDOWN: Controller T1 0/0/0 - IBOC loopdown code detected, deactivating line loopback.
*Sep 27 17:41:00.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 17:41:02.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 17:41:12.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 17:41:12.219: %E1T1_MODULE-3-IBOCLOOPUP: Controller T1 0/0/0 - IBOC loopup code detected, activating line loopback mode.
*Sep 27 17:41:14.219: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 17:45:52.119: %E1T1_MODULE-3-IBOCLOOPDOWN: Controller T1 0/0/0 - IBOC loopdown code detected, deactivating line loopback.
*Sep 27 17:45:52.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 17:45:55.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
*Sep 27 17:46:07.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to down
*Sep 27 17:46:25.199: %LINK-3-UPDOWN: Interface Serial0/0/0:0, changed state to up
