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Devices

llc2(7D)

DESCRIPTION
OBTAINING LLC2 STATISTICS
FILES
ATTRIBUTES
SEE ALSO

NAME

llc2 - Class II logical link control driver

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 controlled by one of the supported communications adapters. The llc2 driver, which appears as a STREAMS driver to the network 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 simultaneously 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 configuration 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 standard 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, stateOld, state	The four previous dlpi states of 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 expirations
inactTimerExp	Number of inactivity timer expirations
sendAckTimerExp	Number of send ack timer expirations

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 attribute:

ATTRIBUTE TYPE	ATTRIBUTE VALUE
Availability	SUNWllc