
370
Cross-Platform Release Notes for Cisco IOS Release 12.0S
OL-1617-14 Rev. Q0
Caveats
Resolved Caveats—Cisco IOS Release 12.0(33)S7
Conditions: This occurs on a provider edge (PE) router running Cisco IOS Release 12.2(31)SB,
12.2(33)SB, 12.2(33)SRB, 12.2(33)SRC, 12.2(33)SRD, 12.4, and 12.4T. Problem is seen with
continuous churn in the network such that BGP never manages to converge and when the paths
churning are not reusing existing path attributes. That will cause those paths to allocate new paths
attributes.
Workaround: Reload the router if low memory conditions are reached or identify the root cause of
the churn and attempt to fix that is possible.
• CSCsy58115
Symptoms: In a router that is running BGP, the BGP process may hold increased amounts of memory
over time without freeing any memory. This symptom may also be seen in the output of the show
proc mem sort command and in the output of the show ip /jointfilesconvert/415844/bgp sum or show ip /jointfilesconvert/415844/bgp vpnv4 all sum
commands and by looking at the number of BGP attributes, which may be increasing over time in
relation to the BGP prefixes and paths, which may remain roughly the same.
Conditions: Some BGP neighbors are not in an established state and are not exchanging prefixes.
Workaround: Remove the configuration lines related to the inactive neighbors (neighbors in the Idle
or Active states).
• CSCsy83266
Symptoms: A router experiences CPU hog or crashes when doing snmpwalk.
Conditions: This symptom is observed when interfaces are attached with a large-scale police
configuration (for example, a two-level policy map, 200 (parent classes) x 15 (child classes) = 3000
policers).
Workaround: There is no workaround for walking the table. To get a specific entry, use snmpget.
• CSCsz12469
Symptoms: It was observed on a Cisco 12816 router that was running Cisco IOS
Release 12.0(32)S6r that some linecard would not fully load to STRTIOS. Some slot would not
completely boot a linecard, which would be stuck in WAITTRY.
Conditions: The following can be observed in the log when this symptom occurs on slot 11:
%MBUS_SYS-3-NOBUFFER: Message from slot 11 in stream 1 dropped %PRP-3-CHP_DESCQ_FULL:
Chopper desc queue 11 full - enq 3383072 deq 3382050 blog 1022 -Traceback= 2044B0
2045B8 534840 535218 5353A4 351284 351350 5F6BE8 60AD34 5FA7D0 5FB24C 2EDFBC
Workaround: If route-processor redundancy exists, an RP forced switchover can reset the Chopper
queue and clear the issue. If there is not a redundant RP, an RP reload will also clear the Chopper
queue.
• CSCtb03758
Symptoms: Traffic drops are observed on serial interfaces that are configured with L2VPNs.
Conditions: This symptom is observed when a microcode reload is performed on the linecard.
Workaround: Perform a shut/no shut on the serial interface on PE1.
• CSCtb25496
Symptoms: New Excellight SFP part was being tested as part of Manufacturing change process
MCN-22773. A few SFP parts failed security check in Cisco IOS software because the data read
from the EEPROM in SFP was FF in some locations. This was further root-caused to the fact that
there is some timing violation on I2C bus to SFP for reading the EPROM data. The I2C interface is
register-mapped on the FPGA, and the software toggles two bits in the register to control the I2C
protocol. Read is the only operation performed on the bus. During a read operation, after every data
byte is read from the I2C slave (SFP), the bus floats for I2C master (FPGA) to return ACK to slave.
Kommentare zu diesen Handbüchern