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Cisco 2960-24TC-L crashes in IOS 15.0(2)SE7 after setting ip-addr to vlan-If

Stefan Sutter
Level 1
Level 1

I believe I found a bug in IOS 15.0(2)SE7 on a WS-C2960-24TC-L. I can replicate a system crash with the following steps:

c2960-*****-2#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
c2960-*****-2(config)#int vlan 12
c2960-*****-2(config-if)#ip address dhcp
c2960-*****-2(config-if)#ip address 172.17.250.250 255.255.0.0
c2960-*****-2(config-if)#do sh run int vl12
Building configuration...

Current configuration : 63 bytes
!
interface Vlan12
 ip address 172.17.250.250 255.255.0.0
end

c2960-*****-2(config-if)#ip address dhcp
c2960-*****-2(config-if)#ip address 172.17.250.250 255.255.0.0 sec
c2960-*****-2(config-if)#ip address 172.17.250.250 255.255.0.0 secondary 
c2960-*****-2(config-if)#do sh run int vl12                              
Building configuration...

Current configuration : 41 bytes
!
interface Vlan12
 ip address dhcp
end

c2960-*****-2(config-if)#ip address 172.17.250.250 255.255.0.0           
c2960-*****-2(config-if)#

I just wanted to give the vlan-if two ip-addresses, one per dhcp, one static. Didn't know this is not possible yet.

After last command the switch crashes and reboots automatically. Here is the output of the system log:

*Mar  1 00:00:34.452: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down
*Mar  1 00:00:35.777: %SPANTREE-5-EXTENDED_SYSID: Extended SysId enabled for type vlan
*Mar  1 00:00:36.834: %DC-4-FILE_OPEN_WARNING: Not able to open flash:/dc_profile_dir/dc_default_profiles.txt 
*Mar  1 00:00:36.834: %DC-6-DEFAULT_INIT_INFO: Default Profiles DB not loaded. 
000005: *Mar  1 00:00:40.282: %AAAA-4-CLI_DEPRECATED: WARNING: Command has been added to the configuration but Type 4 passwords have been deprecated. Migrate to a supported password type
000006: *Mar  1 01:00:40.340: %SYS-6-CLOCKUPDATE: System clock has been updated from 00:00:40 UTC Mon Mar 1 1993 to 01:00:40 UTC Mon Mar 1 1993, configured from console by console.
000007: *Mar  1 01:00:40.340: %SYS-6-CLOCKUPDATE: System clock has been updated from 01:00:40 UTC Mon Mar 1 1993 to 01:00:40 UTC Mon Mar 1 1993, configured from console by console.
000008: *Mar  1 01:00:40.936: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to down
000009: *Mar  1 01:00:40.936: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan16, changed state to down
000010: *Mar  1 01:00:40.961: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan919, changed state to down
000011: *Mar  1 01:00:41.003: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host ####### port 514 CLI Request Triggered
000012: *Mar  1 01:00:41.171: %SYS-5-CONFIG_I: Configured from memory by console
000013: *Mar  1 01:00:42.588: %SYS-5-RESTART: System restarted --
Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 15.0(2)SE7, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Thu 23-Oct-14 14:49 by prod_rel_team
000014: *Mar  1 01:00:42.614: %SSH-5-ENABLED: SSH 2.0 has been enabled
000015: *Mar  1 01:00:42.647: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host ####### port 514 started - CLI initiated
000016: *Mar  1 01:00:42.916: %LINK-5-CHANGED: Interface Vlan1, changed state to administratively down
000017: *Mar  1 01:00:43.520: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up
000018: *Mar  1 01:00:43.520: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state to up
000019: *Mar  1 01:00:43.520: %LINK-3-UPDOWN: Interface FastEthernet0/3, changed state to up
000020: *Mar  1 01:00:43.528: %LINK-3-UPDOWN: Interface FastEthernet0/4, changed state to up
000021: *Mar  1 01:00:43.528: %LINK-3-UPDOWN: Interface FastEthernet0/5, changed state to up
000022: *Mar  1 01:00:43.528: %LINK-3-UPDOWN: Interface FastEthernet0/6, changed state to up
000023: *Mar  1 01:00:43.528: %LINK-3-UPDOWN: Interface FastEthernet0/7, changed state to up
000024: *Mar  1 01:00:43.536: %LINK-3-UPDOWN: Interface FastEthernet0/8, changed state to up
000025: *Mar  1 01:00:43.536: %LINK-3-UPDOWN: Interface FastEthernet0/9, changed state to up
000026: *Mar  1 01:00:43.536: %LINK-3-UPDOWN: Interface FastEthernet0/12, changed state to up
000027: *Mar  1 01:00:44.266: %SPANTREE-5-TOPOTRAP: Topology Change Trap for vlan 10
000028: *Mar  1 01:00:44.266: %SPANTREE-5-ROOTCHANGE: Root Changed for vlan 10: New Root Port is FastEthernet0/5. New Root Mac Address is 0012.####.1600
000029: *Mar  1 01:00:44.526: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
000030: *Mar  1 01:00:44.526: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/2, changed state to up
000031: *Mar  1 01:00:44.526: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up
000032: *Mar  1 01:00:44.535: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to up
000033: *Mar  1 01:00:44.535: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/5, changed state to up
000034: *Mar  1 01:00:44.535: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/6, changed state to up
000035: *Mar  1 01:00:44.535: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/7, changed state to up
000036: *Mar  1 01:00:44.551: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/8, changed state to up
000037: *Mar  1 01:00:44.551: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/12, changed state to up
000038: *Mar  1 01:00:44.602: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan10, changed state to up
000039: *Mar  1 01:00:45.944: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to down
000040: *Mar  1 01:00:47.320: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/9, changed state to up
000041: *Mar  1 01:00:47.949: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/4, changed state to up
000042: *Mar  1 01:00:47.999: %LINK-3-UPDOWN: Interface GigabitEthernet0/2, changed state to up
000043: *Mar  1 01:00:48.242: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up
000044: *Mar  1 01:00:51.195: %SPANTREE-5-ROOTCHANGE: Root Changed for vlan 10: New Root Port is Port-channel1. New Root Mac Address is 000d.####.e400
000045: *Mar  1 01:00:51.204: %SPANTREE-5-TOPOTRAP: Topology Change Trap for vlan 10
000046: *Mar  1 01:00:51.254: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan16, changed state to up
000047: *Mar  1 01:00:51.262: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan919, changed state to up
000048: *Mar  1 01:00:52.160: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up
000049: *Mar  1 01:00:52.948: %SPANTREE-5-ROOTCHANGE: Root Changed for vlan 10: New Root Port is Port-channel1. New Root Mac Address is 000d.####.e400
000050: *Mar  1 01:00:53.150: %LINK-3-UPDOWN: Interface Port-channel1, changed state to up
000051: *Mar  1 01:00:53.955: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/2, changed state to up
000052: *Mar  1 01:00:54.156: %LINEPROTO-5-UPDOWN: Line protocol on Interface Port-channel1, changed state to up
000053: *Nov 25 17:26:16.147: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/6, changed state to down
000054: *Nov 25 17:26:17.464: %SYS-6-LOGGINGHOST_STARTSTOP: Logging to host ###### port 514 started - reconnection
000055: *Nov 25 17:26:18.152: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/6, changed state to up
000056: *Nov 25 17:26:22.690: %DHCP-6-ADDRESS_ASSIGN: Interface Vlan16 assigned DHCP address 192.168.16.238, mask 255.255.255.0, hostname c2960-*****-2

000057: Nov 25 17:26:36.582: %SPANTREE-5-TOPOTRAP: Topology Change Trap for vlan 10
000058: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: System previously crashed with the following message:
000059: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Cisco IOS Software, C2960 Software (C2960-LANBASEK9-M), Version 15.0(2)SE7, RELEASE SOFTWARE (fc1)
000060: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Technical Support: http://www.cisco.com/techsupport
000061: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Copyright (c) 1986-2014 by Cisco Systems, Inc.
000062: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Compiled Thu 23-Oct-14 14:49 by prod_rel_team
000063: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED:  
000064: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Data TLB Miss Exception (0x1100)!
000065: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED:  
000066: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: SRR0 = 0x01204198  SRR1 = 0x00029230  SRR2 = 0x0144C824  SRR3 = 0x00029230
000067: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: ESR = 0x00000000  DEAR = 0x0B0D0B3D  TSR = 0x84000000  DBSR = 0x00000000
000068: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED:  
000069: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: CPU Register Context:
000070: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Vector = 0x00001100  PC = 0x01204198  MSR = 0x00029230  CR = 0x33000039
000071: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: LR = 0x01204194  CTR = 0x0149BD68  XER = 0xE000003F
000072: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R0 = 0x01204194  R1 = 0x037A2D00  R2 = 0x00000000  R3 = 0x00000000
000073: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R4 = 0x0145294C  R5 = 0x00029230  R6 = 0xBEEFCAFE  R7 = 0xBEEFCAFE
000074: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R8 = 0x02458B10  R9 = 0x0B0D0B0D  R10 = 0x024A0FA8  R11 = 0x024A0000
000075: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R12 = 0x0007ADC0  R13 = 0x00110000  R14 = 0x01D00564  R15 = 0x01D00758
000076: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R16 = 0x00000009  R17 = 0x01CFE2F8  R18 = 0x024569D0  R19 = 0x0212BCB0
000077: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R20 = 0xFFFFFF00  R21 = 0x034A6570  R22 = 0x00000000  R23 = 0x00000019
000078: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R24 = 0x03A1F4CC  R25 = 0x026C28C4  R26 = 0x00000000  R27 = 0xFFFFFFFF
000079: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: R28 = 0x00000000  R29 = 0x00000000  R30 = 0x02629DB8  R31 = 0x03819A68
000080: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED:  
000081: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Stack trace:
000082: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: PC = 0x01204198, SP = 0x037A2D00
000083: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 00: SP = 0x037A2D10    PC = 0x01204194
000084: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 01: SP = 0x037A2D38    PC = 0x00FE2EAC
000085: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 02: SP = 0x037A2D70    PC = 0x00F81E84
000086: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 03: SP = 0x037A2D80    PC = 0x00F829B8
000087: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 04: SP = 0x037A2DB0    PC = 0x00F851E4
000088: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 05: SP = 0x037A34A8    PC = 0x00E99B88
000089: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 06: SP = 0x037A3508    PC = 0x00E9A140
000090: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 07: SP = 0x037A3510    PC = 0x014A6C78
000091: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: Frame 08: SP = 0x00000000    PC = 0x014A122C
000092: Nov 25 17:27:02.855: %PLATFORM-1-CRASHED: 

Wasn't able to verify this on another switch with the same IOS. Maybe someone else can prove this?

1 Reply 1

Rajeev Sharma
Cisco Employee
Cisco Employee

Hey Stefan,

I believe its a good candidate for a TAC case.

HTH.

Regards,

RS.

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