SNMP and Link Status

Products PMP
1

Is there a way with a SNMP command sent to the SM to get the details off the link status page on the SM?  I mainly want the uplink and downlink power levels?

Also, is there a way with an SNMP command sent to the SM to do a link test and retrieve the results?

2
@hci wrote:

Is there a way with a SNMP command sent to the SM to get the details off the link status page on the SM?  I mainly want the uplink and downlink power levels?

Also, is there a way with an SNMP command sent to the SM to do a link test and retrieve the results?

WHISP-SM-MIB::radioDbmHorizontal.0 -63.0
WHISP-SM-MIB::radioDbmVertical.0 -63.0

WHISP-SM-MIB::signalToNoiseRatioSMVertical.0 18

WHISP-SM-MIB::signalToNoiseRatioSMHorizontal.0 16

As far as I know the only place to retrieve via SNMP the uplink dBm and SNR is in the session data at the AP. (walk 10.16.14.3 1.3.6.1.4.1.161.19.3.1.4.1 and have fun)

Regarding link test, you also need to do this from the AP AFAIK...

snmpwalk of 1.3.6.1.4.1.161.19.3.1.2 covers the pertinent fields.

The MIB informs us:

linkTestAction

Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.3

Syntax: INTEGER

Constraints:

0: stopped

1: start


Access: read-write

Status: current


Setting value 1 will initiate link test. Note that trying to set 0 will not stop the test.

In fact it will return an error message. The value of 0 just indicates the idle state

meaning no test is running or the current test is done.

That’s why the word stopped is used and not the action verb stop.



linkTestDirection


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.10

Syntax: INTEGER

Constraints:

1: uplinkonly

2: downlinkonly

3: bidirectional


Access: read-write

Status: current


Link Test Direction - Engineering Use Only

0 = not set - default (will do bidirectional)

1 = Downlink Only

2 = Uplink Only

3 = Bi-Directional (same as 0, setting to 0 will result in setting it to 3)



linkTestDuration


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.2

Syntax: INTEGER

Access: read-write

Status: current


Duration for the Link Test. Valid range: 2-10 seconds



linkTestError


Object ID: 1.3.6.1.4.1.161.19.3.1.2.2.3

Syntax: OCTET STRING

Constraints: SIZE (0…255)

Access: read-only

Status: current


Error status of Link Test:

(1) Failed to recieve handshake from remote device

(2) No session is currently active. Please try again after session established.

(3) Received a bad transaction ID. Please try again.

(4) We werent able to send the test request to the remote device.

(5) We didnt receive any results from the remote device.



linkTestForceModulation


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.9

Syntax: INTEGER

Constraints:

0: normalRateAdapt

1: forceMaxModulation


Access: read-write

Status: current


Engineering use only.

Link Test with:

0 = Normal Rate Adapt algorithm

1 = Force to max modultion - No Rate Adapt Algorithm



linkTestLUID


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.1

Syntax: INTEGER

Access: read-write

Status: current


LUID selection for Link Test. Valid range: 2-255



linkTestMode


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.5

Syntax: INTEGER

Constraints:

0: rflinktest

1: linktestwithbridging

2: linktestwithbridgingandmir


Access: read-write

Status: current


Link Test Mode

0 = RF Link Test (traffic doesn’t go through bridge, highest throughput)

1 = Link Test with Bridging

2 = Link Test with Bridging and MIR



linkTestNumPkt


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.8

Syntax: INTEGER

Access: read-write

Status: current


Number of packets to send. Valid range: 0-64 where 0 will

flood the link for the duration of the test.



linkTestPktLength


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.4

Syntax: INTEGER

Access: read-write

Status: current


Packet length for Link Test. Valid range: 64-1714 bytes



linkTestSNRCalculation


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.6

Syntax: INTEGER

Constraints:

0: disable

1: enable


Access: read-write

Status: current


Enable or disable Signal to Noise Ratio (SNR) calculations during a Link Test.

Enabling(1) will calulate SNR on all receiving packets.

Due to load on CPU, will slightly degrade packet per second capabilities.

Only applicable to GenII OFDM products and up.



linkTestStatus


Object ID: 1.3.6.1.4.1.161.19.3.1.2.2.2

Syntax: OCTET STRING

Constraints: SIZE (0…255)

Access: read-only

Status: current


Status for Link Test.



linkTestWithDualPath


Object ID: 1.3.6.1.4.1.161.19.3.1.2.1.7

Syntax: INTEGER

Constraints:

0: lowpriorityvconly

1: highandlowpriorityvcs


Access: read-write

Status: current


Link Test with:

0 = Low Priority VC only

1 = High and Low Priority VCs

However, the MIB indicates that 1.3.6.1.4.1.161.19.3.1.4.1 is "List of link test results" but it appears to just be current link status...  Not sure where you retrieve the results yet.

j