IBM pSeries manual Packets dropped because of a hardware problem on an endpoint

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There are two routes.

sending packet using route No. 1 ml ip address structure, starting:

ml flag (ml interface up or down) = 0x00000000 ml tick = 0

ml ip address = 0xc0a80203, 192.168.2.3

There are two preferred route pairs: from local if 0 to remote if 0 from local if 1 to remote if 1

There are two actual routes (two preferred).

---------------------------------------

from local if 0 to remote if 0 destination ip address structure:

if flag (up or down) = 0x000000c1 if tick = 0

ipaddr = 0xc0a80003, 192.168.0.3

---------------------------------------

from local if 1 to remote if 1 destination ip address structure:

if flag (up or down) = 0x000000c1 if tick = 0

ipaddr = 0xc0a80103, 192.168.1.3

5.12.3Packets dropped because of a hardware problem on an endpoint

To check for dropped packets at the HMC, check /var/adm/sni/sni_errpt_capture. Each hardware event has an entry. If you don't have the register mappings for error bits, check whether the errors are recoverable (non-MP-Fatal) or MP-Fatal. (MP-Fatal errors take longer to recover from and could be associated with more drops.)

The following is an example of Recoverable/Non Mp Fatal entry in /var/adm/sni/sni_errpt_capture:

Current time is:

Mon Oct 4 05:08:51 2004

Errpt Sequence num is: 3229

Errpt Timestamp is:

Mon Oct 4 05:08:51 2004

Event TOD is:

2004160209010410

Event TOD date:

Oct 04 09:02:16 2004

Not MP Fatal

 

DSS Log count = 07

 

1st Attn type = Recoverable

2nd Attn type = Recoverable

1st Alert type = Alert 02 - SMA Detected Error FNM handles callout

SMA chip (GFW #)

3

SMA location

U1.28-P1-H1/Q1

SMA logically defined in this LPAR sni1

Failure Signature

8073D001

pshpstuningguidewp040105.doc

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Contents IBM ~pSeries High Performance Switch Contents Mpprintenv Mpstatistics Introduction Mppollinginterval Tunables and settings for switch softwareMPI tunables for Parallel Environment MpeagerlimitMemoryaffinity Mprexmitbufsize and MprexmitbufcntMptaskaffinity MpcssinterruptMPI-IO Chgsni command Tunables and settings for AIX 5L IP tunablesFile cache Svmon and vmstat commands Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual SvmonPin Pgsp Virtual VmstatLarge page sizing Pshpstuningguidewp040105.doc Large pages and IP support Memory affinity for a single LparAmount of memory available Debug settings in the AIX 5L kernel Daemon configurationRsct daemons LoadLeveler daemons Reducing the number of daemons runningReducing logging Settings for AIX 5L threads Placement of POE managers and LoadLeveler schedulerAIX 5L mail, spool, and sync daemons Iptrclvl setting Debug settings and data collection toolsLsattr tuning Driverdebug settingAffinity LPARs Small Real Mode Address Region on HMC GUIDeconfigured L3 cache Service focal pointErrpt command HMC error loggingMultiple versions of MPI libraries Mpprintenv Memoryaffinity MpstatisticsDropped switch packets Nddipacketsmsw 0x00000000 Nddipacketslsw Packets dropped in the ML0 interface Packets dropped because of a hardware problem on an endpoint Mpinfolevel Packets dropped in the switch hardwareLapidebugperf LapidebugcommtimeoutHPS documentation AIX 5L trace for daemon activityConclusions and summary Additional readingIBM Redbooks POWER4MPI documentation AIX 5L performance guidesPshpstuningguidewp040105.doc