Cisco OL-4015-08 Bedienungsanleitung PDF herunterladen (Seite 279)

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Cross-Platform Release Notes for Cisco IOS Release 12.0S

OL-1617-14 Rev. Q0

Caveats

Resolved Caveats—Cisco IOS Release 12.0(32)S2

Conditions: This symptom is observed on a Cisco 12000 series when you insert a new line card and

remove the line card before it reaches the “IOS RUN” state, for example, when the line card is still

in the “IOS STRT” or “IOS UP” state.

Workaround: After you have inserted a line card, wait until the line card is in the “IOS RUN” state

before you remove it. If the line card becomes stuck before reaching the “IOS RUN” state, remove

the line card, and enter the show controller tofab queue 0 command on other Engine 3 or Engine

5 line cards in the chassis to check if the tofab queues towards slot 0 are uncorrupted. If the queues

are corrupted, reload slot 0 to recover from the situation.

• CSCsb00759

Symptoms: A Cisco 3640 or Cisco 3660 stops encrypting GRE packets, which are then sent in the

clear.

Conditions: This symptom is observed on a Cisco 3640 and Cisco 3660 that run Cisco IOS

Release 12.3(13), that are configured for CEF, and that have an interface (but not the interface with

the crypto map) that has that has the ip tcp header-compression command enabled and

physical-layer async command enabled.

Workaround: Enter the no route-cache cef command followed by the route-cache cef command.

Alternate Workaround: Delete the crypto map from the interface and re-apply the crypto map.

• CSCsb01043

Symptoms: When a Turbo ACL classification table grows beyond a certain size, a memory

allocation failure may occur or the router may crash.

If the router runs Cisco IOS Release 12.1E or 12.3, memory corruption may occur, causing the

router to crash. If the router runs Cisco IOS Release 12.2S, an error message similar to the following

may appear during a Turbo ACL compilation, the compilation will fail, and a recompilation is

forced:

%SYS-2-CHUNKBADELESIZE: Chunk element size is more than 64k for TACL Block -Process=

"TurboACL", ipl= 0, pid= 82

These symptoms do not occur because of an out-of-memory condition.

Conditions: This symptom is observed on a Cisco router that is configured for Turbo ACL. The

Cisco 10000 series is not affected.

Workaround: Monitor the output of the show access-lists compiled command and force the Turbo

ACL tables to be cleared if a table is at risk of growing large enough to trigger the symptoms.

The tables that have significant sizes are the first and third tables shown next to “L1:” and the first

table shown next to “L2:”. When the number after the slash for one of these tables is greater than

16384 for the “L1” tables or greater than 32768 for the “L2” table, the table is already too large and

the symptom may occur any moment.

When the number is in the range from 10924 to 16384 inclusive for the “L1” tables or the range from

21846 to 32768 inclusive for the “L2” tables, the table size will be too large on the next expansion.

An expansion occurs when the number to the left of the slash reaches 90 percent of the value to the

right of the slash. When the value to the left of the slash approaches 90 percent of the value to the

right, enter the no access-list compiled command followed by the access-list compiled command

to disable and re-enable Turbo ACL. Doing so causes the tables to be cleared and, therefore, delay

the expansion. This workaround may be impractical when there is a high rate of incoming packets

and when entries are added frequently to the tables.

Alternative Workaround: Disable Turbo ACL by entering the no access-list compiled command.

Note that neither of these workarounds are supported on a Cisco 7304 that is configured with an

NSE-100: there is no workaround for this platform.

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