When I poll a PTP450 BH master with SNMP for signal quality this what I get.
snmpget -v2c -c Canopyro -m ALL 169.254.1.1 .1.3.6.1.4.1.161.19.3.1.4.1.40.2
SNMPv2-SMI::enterprises.161.19.3.1.4.1.40.2 = STRING: "VC 18 Rate 8X/6X MIMO-B VC 255 Rate 8X/6X MIMO-B"
What is this telling me? Is one value uplink and one down? Or is one value vertical and other horizontal?
How can I get this value from a SM or BH slave?
@hci wrote:When I poll a PTP450 BH master with SNMP for signal quality this what I get.
snmpget -v2c -c Canopyro -m ALL 169.254.1.1 .1.3.6.1.4.1.161.19.3.1.4.1.40.2
SNMPv2-SMI::enterprises.161.19.3.1.4.1.40.2 = STRING: "VC 18 Rate 8X/6X MIMO-B VC 255 Rate 8X/6X MIMO-B"What is this telling me? Is one value uplink and one down? Or is one value vertical and other horizontal?
How can I get this value from a SM or BH slave?
They are:
VC 18 Rate 8X/6X MIMO-B <- Low priority VC
VC 255 Rate 8X/6X MIMO-B <- Hi priority VC
On the Slave (or SM) you can use the following OID: .1.3.6.1.4.1.161.19.3.2.2.20.0 (WHISP-SM-MIB::adaptRate.0)
Or you can use these oids to get only the rate:
.1.3.6.1.4.1.161.19.3.2.2.128.0 (WHISP-SM-MIB::adaptRateLowPri.0)
.1.3.6.1.4.1.161.19.3.2.2.129.0 (WHISP-SM-MIB::adaptRateHighPri.0)
What is difference between low priority and high priority VC and why would they run at different modulations on a PTP450?
I assume that based on tagging you can give some packets a higher priority and if the link is busy they will have precedence but I do not see why that would affect modulation rate?
Thanks.
@hci wrote:What is difference between low priority and high priority VC and why would they run at different modulations on a PTP450?
I assume that based on tagging you can give some packets a higher priority and if the link is busy they will have precedence but I do not see why that would affect modulation rate?
Thanks.
hci,
The difference between the two VCs is only the scheduling. The High Priority VC will always be sent first.
They have different modulation rates only when there is no traffic going over the other VC. If traffic is going over both VCs, their modulation rates will match. For example if there is no High Priority traffic, you will see the Low Priority VC modulation rate start at 1X and rate adapt up to lets say 6X, but the HP VC will stay at 1X. Then once traffic is sent it will rate adapt up as well.
We are considering changing this in a future release where all the VCs could share the same rate adapt on the same radio.
Charlie