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Add IF-MIB::ifHighSpeed for >2.5Gbps interfaces

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Cut a Debian release.
This commit is contained in:
Pim van Pelt
2025-06-23 20:47:18 +02:00
parent ccc2b5ad4d
commit 686bbe46b0
2 changed files with 32 additions and 7 deletions
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9
debian/changelog vendored
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@ -1,3 +1,12 @@
govpp-snmp-agentx (1.1.1-1) bookworm; urgency=medium
* Add IF-MIB::ifHighSpeed field (OID 1.3.6.1.2.1.31.1.1.1.15)
* Populate ifHighSpeed with interface speed in Megabits per second
* Implement conditional ifSpeed population (skip for speeds > 2.5Gbps)
* Improve SNMP compliance for high-speed interface reporting
-- Pim van Pelt <pim@ipng.ch> Sun, 23 Jun 2025 00:10:00 +0000
govpp-snmp-agentx (1.1.0-1) bookworm; urgency=medium
* Add interface event monitoring with VPP API integration

30
src/ifmib/ifmib.go
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@ -60,6 +60,7 @@ import (
// ifHCOutUcastPkts .11 - Counter64
// ifHCOutMulticastPkts .12 - Counter64
// ifHCOutBroadcastPkts .13 - Counter64
// ifHighSpeed .15 - Gauge32 (interface speed in Mbps)
// ifAlias .18 - DisplayString
const ifEntryOID = "1.3.6.1.2.1.2.2.1"
@ -231,14 +232,19 @@ func (m *InterfaceMIB) addIfEntry(iface *api.InterfaceCounters, idx int) {
item.Type = pdu.VariableTypeInteger
item.Value = mtu
// ifSpeed (.5) - Use real speed if available, otherwise default to 1Gbps
speed := uint32(1000000000)
if details != nil && details.Speed > 0 {
speed = uint32(details.Speed)
// ifSpeed (.5) - Only populate for speeds <= 2.5Gbps (legacy field limitation)
if details != nil && details.Speed > 0 && details.Speed <= 2500000000 {
// Use real speed for interfaces <= 2.5Gbps
item = m.handler.Add(fmt.Sprintf("%s.5.%d", ifEntryOID, idx))
item.Type = pdu.VariableTypeGauge32
item.Value = uint32(details.Speed)
} else if details == nil || details.Speed == 0 {
// Default to 1Gbps when speed is unknown
item = m.handler.Add(fmt.Sprintf("%s.5.%d", ifEntryOID, idx))
item.Type = pdu.VariableTypeGauge32
item.Value = uint32(1000000000)
}
item = m.handler.Add(fmt.Sprintf("%s.5.%d", ifEntryOID, idx))
item.Type = pdu.VariableTypeGauge32
item.Value = speed
// For speeds > 2.5Gbps, don't populate ifSpeed field at all
// ifPhysAddress (.6) - Use real MAC address if available
macAddr := ""
@ -411,6 +417,16 @@ func (m *InterfaceMIB) addIfXTable(iface *api.InterfaceCounters, idx int) {
item.Type = pdu.VariableTypeCounter64
item.Value = iface.TxBroadcast.Packets
// ifHighSpeed (.15) - Interface speed in Megabits per second
details := m.interfaceDetails[iface.InterfaceIndex]
speedMbps := uint32(1000) // default 1 Gbps = 1000 Mbps
if details != nil && details.Speed > 0 {
speedMbps = uint32(details.Speed / 1000000) // Convert bps to Mbps
}
item = m.handler.Add(fmt.Sprintf("%s.15.%d", ifXTableOID, idx))
item.Type = pdu.VariableTypeGauge32
item.Value = speedMbps
// ifAlias (.18) - Interface description/alias
item = m.handler.Add(fmt.Sprintf("%s.18.%d", ifXTableOID, idx))
item.Type = pdu.VariableTypeOctetString