llc2(7D)
NAME
llc2 - Class II logical link control driver
DESCRIPTION
The llc2 logical link control driver interfaces network
software (NetBIOS, SNA, OSI, and so on) running under the
Solaris operating environment to a physical LAN network con-
trolled by one of the supported communications adapters. The
llc2 driver, which appears as a STREAMS driver to the net-
work software, resides in the kernel and is accessed by
standard UNIX STREAMS functions.
This version of the llc2 driver includes support for both
connectionless and connection-oriented logical link control
class II (llc2) operations for Ethernet, Token Ring, and
FDDI adapters when accessed through the appropriate Solaris
MAC layer driver. The Data Link Provider Interface (DLPI) to
the llc2 driver enables multiple and different protocol
stacks, (including NetBIOS and SNA), to operate simultane-
ously over one or more local area networks.
To start the llc2 driver by default, rename file
/etc/llc2/llc2_start.default to /etc/llc2/llc2_start. This
allows the /etc/rc2.d/S40llc2 script to build up the confi-
guration file for each ppa interface in
/etc/llc2/default/llc2.* and start llc2 on each interface.
To verify the configuration files, manually run
/usr/lib/llc2/llc2_autoconfig.
For more information on the llc2 driver, see the IEEE stan-
dard 802.2 Logical Link Control.
OBTAINING LLC2 STATISTICS
You can obtain LLC2 statistics or reset the statistics
counter to zero using the ILD_LLC2 ioctl. The ILD_LLC2 ioctl
has a number of subcommands. The following retrieve LLC2
statistics:
Name | Function
LLC2_GET_STA_STATS | Get station statistics
LLC2_GET_SAP_STATS | Get SAP statistics
LLC2_GET_CON_STATS | Get connection statistics
The structure used depends on the subcommand sent.
LLC2_GET_STA_STATS
The LLC2_GET_STA_STATS command retrieves statistics on a
particular Physical Point of Attachment (PPA).
When sending the LLC2_GET_STA_STATS command, the
llc2GetStaStats structure is used:
typedef struct llc2GetStaStats {
uint_t ppa;
uint_t cmd;
uchar_t clearFlag;
uchar_t state;
ushort_t numSaps;
uchar_t saps[LLC2_MAX_SAPS];
uint_t nullSapXidCmdRcvd;
uint_t nullSapXidRspSent;
uint_t nullSapTestCmdRcvd;
uint_t nullSapTestRspSent;
uint_t outOfState;
uint_t allocFail;
uint_t protocolError;
} llc2GetStaStats_t;
The members of the structure are:
Member | Description
cmd | LLC2_GET_STA_STATS
clearFlag | Clear counters flag. Set this to
| 0 to retreive statistics and to 1
| to reset all counters to 0.
state | Station component state. Possible
| values are ?????
numSaps | Number of active SAPs in the saps
| array
saps | An array of active SAP values
nullSapXidCmdRcvd | Number of NULL SAP XID commands
| received
nullSapXidRspSent | Number of NULL SAP XID responses
| sent
nullSapTestCmdRcvd | Number of NULL SAP TEST commands
| received
nullSapTestRspSent | Number of NULL SAP TEST responses
| sent
outOfState | Number of invalid events received
allocFail | Number of buffer allocation
| failures
protocolError | Number of protocol errors
LLC2_GET_SAP_STATS
The LLC2_GET_SAP_STATS command retrieves statistics related
to a particular SAP. When sending the LLC2_GET_SAP_STATS
command, the llc2GetSapStats structure is used:
typedef struct llc2GetSapStats {
uint_t ppa;
uint_t cmd;
uchar_t sap;
uchar_t clearFlag;
uchar_t state;
uint_t numCons;
ushort_t cons[LLC2_MAX_CONS];
uint_t xidCmdSent;
uint_t xidCmdRcvd;
uint_t xidRspSent;
uint_t xidRspRcvd;
uint_t testCmdSent;
uint_t testCmdRcvd;
uint_t testRspSent;
uint_t testRspRcvd;
uint_t uiSent;
uint_t uiRcvd;
uint_t outOfState;
uint_t allocFail;
uint_t protocolError;
} llc2GetSapStats_t;
The members are:
Member | Description
ppa | Physical Point of Attachment number
cmd | LLC2_GET_SAP_STATS
sap | SAP value
clearFlag | Clear counters flag. Set this to 0 to
| retreive statistics and to 1 to
| reset all counters to 0.
state | SAP component state
numCons | Number of active connections in the
| cons array
cons | Array of active connection indexes
xidCmdSent | Number of XID commands sent
xidCmdRcvd | Number of XID responses
received |
xidRspSent | Number of XID responses sent
xidRspRcvd | Number of XID responses received
testCmdSent | Number of TEST commands sent
testCmdRcvd | Number of TEST commands received
testRspSent | Number of TEST responses sent
testRspRcvd | Number of TEST responses received
uiSent | Number of UI frames sent
uiRcvd | Number of UI frames received
outOfState | Number of invalid events received
allocFail | Number of buffer allocation failures
protocolError | Number of protocol errors
LLC2_GET_CON_STATS
The LLC2_GET_CON_STATS command retrieves statistics related
to a particular connection component. When sending the
LLC2_GET_CON_STATS command, the llc2GetConStats structure is
used:
typedef struct llc2GetConStats {
uint_t ppa;
uint_t cmd;
uchar_t sap;
ushort_t con;
uchar_t clearFlag;
uchar_t stateOldest;
uchar_t stateOlder;
uchar_t stateOld;
uchar_t state;
ushort_t sid;
dlsap_t rem;
ushort_t flag;
uchar_t dataFlag;
uchar_t k;
uchar_t vs;
uchar_t vr;
uchar_t nrRcvd;
ushort_t retryCount;
uint_t numToBeAcked;
uint_t numToResend;
uint_t macOutSave;
uint_t macOutDump;
uchar_t timerOn;
uint_t iSent;
uint_t iRcvd;
uint_t frmrSent;
uint_t frmrRcvd;
uint_t rrSent;
uint_t rrRcvd;
uint_t rnrSent;
uint_t rnrRcvd;
uint_t rejSent;
uint_t rejRcvd;
uint_t sabmeSent;
uint_t sabmeRcvd;
uint_t uaSent;
uint_t uaRcvd;
uint_t discSent;
uint_t outOfState;
uint_t allocFail;
uint_t protocolError;
uint_t localBusy;
uint_t remoteBusy;
uint_t maxRetryFail;
uint_t ackTimerExp;
uint_t pollTimerExp;
uint_t rejTimerExp;
uint_t remBusyTimerExp;
uint_t inactTimerExp;
uint_t sendAckTimerExp;
} llc2GetConStats_t;
The members of the structure are:
Member Description
ppa Physical Point of Attachment number
cmd LLC2_GET_CON_STATS
sap SAP value
con Connection index
clearFlag Clear counters flag. Set this to 0
to retreive statistics and to 1 to
reset all counters to 0.
stateOldest, stateOlder, The four previous dlpi states of
stateOld, state the connection
sid SAP value and connection index
dlsap_t rem Structure containing the remote MAC
address and SAP
flag Connection component processing
flag
dataFlag DATA_FLAG
k transmit window size
vs Sequence number of the next I-frame
to send
vr Sequence number of the next I-frame
expected
nrRcvd Sequence number of the last I-frame
acknowledged by the remote node
retryCount Number of timer expirations
numToBeAcked Number of outbound I-frames to be
acknowledged
numToResend Number of outbound I-frames to be
re-sent
macOutSave Number of outbound I-frames held by
the MAC driver to be saved on
return to LLC2
macOutDump Number of outbound I-frames held by
the MAC driver to be dumped on
return to LLC2
timerOn Timer activity flag
iSent Number of I-frames sent
iRcvd Number of I-frames received
frmrSent Number of frame rejects sent
frmrRcvd Number of frame rejects received
rrSent Number of RRs sent
rrRcvd Number of RRs received
rnrRcvd Number of RNRs received
rejSent Number of rejects sent
rejRcvd Number of rejects received
sabmeSent Number of SABMEs sent
sabmeRcvd Number of SABMEs received
uaSent Number of UAs sent
uaRcvd Number of UAs received
discSent Number of DISCs sent
outOfState Number of invalid events received
allocFail Number of buffer allocation
failures
protocolError | Number of protocol errors
localBusy | Number of times in a local busy
| state
remoteBusy | Number of times in a remote busy
| state
maxRetryFail | Number of failures due to reaching
| maxRetry
ackTimerExp | Number of ack timer expirations
pollTimerExp | Number of P-timer expirations
rejTimerExp | Number of reject timer expirations
remBusyTimerExp | Number of remote busy timer expira-
| tions
inactTimerExp | Number of inactivity timer expira-
| tions
sendAckTimerExp | Number of send ack timer expira-
| tions
FILES
/dev/llc2
Clone device used to access the driver
/etc/llc2/default/llc2.? configuration files (One file
per ppa interface.)
ATTRIBUTES
See attributes(5) for a description of the following attri-
bute:
____________________________________________________________
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
|_____________________________|_____________________________|
| Availability | SUNWllc |
|_____________________________|_____________________________|
SEE ALSO
llc2_autoconfig(1), llc2_config(1), llc2(4)
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