Cisco Cisco IOS Software Release 12.2(27)SBC

CSCud05469

Symptom: A Cisco 10000 series router crashes when there are several PPPoE sessions in TRANS 
state and the command show pxf cpu statistics interface is entered:

10k2#show pppoe summ                         

    PTA  : Locally terminated sessions

    FWDED: Forwarded sessions

    TRANS: All other sessions (in transient state)

                      TOTAL     PTA   FWDED   TRANS

TOTAL                  3794    3594       0     200

GigabitEthernet6/0/0   3794    3594       0     200

10k2#show pxf cpu statistics interface g6/0/0

NOTE: Stats with active drops are prefixed by < or > characters:

    < Denotes input drops within the last second, > for output drops

  Interface GigabitEthernet6/0/0 (vcci 2525,  VLAN 1)

                                packets   pkts/sec          bytes    kbits/sec

  DATA RECEIVED                       0          0              0            0

   Total input drops                  0          0              0            0

  DATA TRANSMITTED               281744       1154       16676232          530

   Total output drops                 0          0              0            0

...

Address Error (load or instruction fetch) exception, CPU signal 10, PC = 0x611EF5A4

-Traceback= 611EF5A4 611F0F34 611F12F0 611F159C 611ECC04 60538294 601C668C

605534B0 6065B670 6065B65C 

$0 : 00000000, AT : 62FC0000, v0 : 00000009, v1 : 0B0D0B0D

a0 : 00000001, a1 : FFFFFFFF, a2 : 00000000, a3 : 00000000

t0 : 606A4F98, t1 : 3400FF01, t2 : FFFF00FF, t3 : 606A4F78

t4 : 606A4F78, t5 : 00000000, t6 : 00000020, t7 : 0000FF00

s0 : 67DC81D8, s1 : 62EC3B40, s2 : 71FC5C6C, s3 : 000003E8

s4 : 0000001D, s5 : 24C7BF58, s6 : 00000001, s7 : 000003E8

t8 : 63C7B7E4, t9 : 6069C9C8, k0 : 22D65934, k1 : 606906B0

gp : 62FC5F68, sp : 71F2FBF0, s8 : 24C7BE70, ra : 611EF5A0

EPC  : 611EF5A4, ErrorEPC : BFC00D7C, SREG     : 3400FF03

MDLO : 00000000, MDHI     : 00000002, BadVaddr : 0B0D0B3D

CacheErr : 00000000, DErrAddr0 : 00000000, DErrAddr1 : 00000000

DATA_START : 0x62C89630

Cause 00000010 (Code 0x4): Address Error (load or instruction fetch) exception

Writing crashinfo to bootflash:crashinfo_20121102-

Conditions: The symptom is observed on a Cisco 10000 series router with any IOS version.

Workaround: Do not execute this command when there are several PPPoE sessions in TRANS state. 

Cisco IOS Release 12.2(33)SB13 is a rebuild release for Cisco IOS Release 12.2(33)SB. The Bugs in 
this section are resolved in Cisco IOS Release 12.2(33)SB13 but may be open in previous Cisco IOS 
releases.

CSCsr64777

Symptoms: A router crashes because of a block overrun (overwriting the memory block).

Conditions: This symptom is observed only when NetFlow version 5 is used.