Installation guide

Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 5.2(6)

OL-27554-01

Caveats

Resolved Caveats

• CSCua70336

Symptom: The FLOGI process might fail repeatedly, which leads to a system reload if a module

reboots during an ISSU or DSSU. This issue can occur only if a module reloads (for any reason)

during ISSU or DSSU. This is not a normal event and this issue is not likely to occur.

Workaround: This issue is resolved.

• CSCtr42293

Symptom: An IOA tape read acceleration problem occurs when sending Accept (ACC) to the Read

Exchange Concise (REC) Extended Link Service with data_xfer_count = 0, and when a few data

packets have been sent. Once the REC ACC is sent, the host sends a Sequence Retransmission

Request (SRR) FCP FC-4 Link Service Request to claim the rest of the data. The target sends a

REJECT, which causes the host to end the exchange. This symptom might be seen when IOA

retransmissions occur from target to host.

Workaround: This issue is resolved.

• CSCtr59985

Symptom: A tape target is unresponsive and a permanent error is sent to the host. The host side and

target side IOA traces show multiple Read Exchange Concise and Sequence Retransmission Request

events followed by ABTS for the read exchanges.

Workaround: This issue is resolved.

• CSCtx45067

Symptom: A process fails in /isan/bin/xbm when the CPU is mostly occupied by two or three

processes and snmpd is one of them.

This symptom occurs on Cisco MDS 9000 switches running Cisco NX-OS Release 5.0(4d). When

there is frequent interaction between snmpd and other processes such as zone, the priority of these

processes is promoted. As the result, these two processes and a few others occupy most of the CPU,

and other processes do not get to run which causes them to fail, typically due to a heartbeat failure.

CSCtz19169 OO

CSCtz40700 OO

CSCtz40745 OO

CSCua09712 —O

Severity 5

CSCtz84847 —O

Severity 6

CSCtr01652 —R

CSCty47599 —O

CSCuh27347 OO

Table 17 Open Caveats and Resolved Caveats Reference (continued)

DDTS Number

NX-OS Software Release (Open

or Resolved)

NX-OS Software Release (Open

or Resolved)

5.2(2d) 5.2(6)