The only place where I can think of would be in the textual convention RFCs.
* https://www.rfc-editor.org/rfc/rfc1213.html * https://www.rfc-editor.org/rfc/rfc2579.html A quick scan doesn't seem to indicate a case preference. On Wed, Mar 26, 2025 at 9:58 AM 'Brian Candler' via Prometheus Users < [email protected]> wrote: > > Why does SNMP exporter show MAC addresses as uppercase? > > That's what the code does: > > https://github.com/prometheus/snmp_exporter/blob/v0.28.0/collector/collector.go#L871-L877 > > case "PhysAddress48": > subOid, indexOids := splitOid(indexOids, 6) > parts := make([]string, 6) > for i, o := range subOid { > * parts[i] = fmt.Sprintf("%02X", o)* > } > return strings.Join(parts, ":"), subOid, indexOids > > I don't think there's any standard which says hex MAC addresses should be > rendered as uppercase or lowercase, and I've seen both on physical hardware > (i.e. switches and routers). > > On Wednesday, 26 March 2025 at 05:25:28 UTC Elliott Balsley wrote: > >> I figured out how to change this with relabel_configs so it's just a >> curiosity. >> >> On Tuesday, March 25, 2025 at 6:28:38 PM UTC-7 Elliott Balsley wrote: >> >> Why does SNMP exporter show MAC addresses as uppercase? For example, >> using the default snmp.yml with if_mib module I get this: >> >> ifPhysAddress{ifAlias="",ifDescr="eth0",ifIndex="2",ifName="eth0",ifPhysAddress="3C:EC:EF:3C:B1:5E"} >> 1 >> >> Net-snmp tools show these values as lowercase, as does the snmp-exporter >> README >> <https://github.com/prometheus/snmp_exporter/blob/main/generator/README.md> >> : >> # PhysAddress48: A 48 bit MAC address, rendered as 00:01:02:03:04:ff. >> >> If you're wondering why this matters... I'm trying to migrate some SNMP >> configs from Telegraf to the Prometheus SNMP Exporter. I have a bunch of >> existing data in Prometheus, so I'm hoping to build the configs such that >> all my time series continue. Telegraf uses lower-case MACs. >> >> -- > You received this message because you are subscribed to the Google Groups > "Prometheus Users" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/prometheus-users/2b82d181-165c-4c04-b0cf-75acaa4cfa3fn%40googlegroups.com > <https://groups.google.com/d/msgid/prometheus-users/2b82d181-165c-4c04-b0cf-75acaa4cfa3fn%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/prometheus-users/CABbyFmpBHS4Cvhh97OTBndiMKVHf0QGzFFVwdDtvcT7bM-RKZw%40mail.gmail.com.
