On Wed, 2010-03-17 at 16:26 +1300, Steve Shipway wrote: 
> 
> Just in case something in the kernel has gone screwy, I'd suggest rebooting 
> to re-init the whole SNMP and network stack, and test it again.

Holding off on the reboot to explore the current situation and why it's
not working with/for mrtg at the moment...

> If it's still not working, then use snmpwalk on the interface tree and see 
> what's there - is the interface completely absent, or are some items visible? 
>  It may be that e.g. using the IP address as identifier will work, though 
> this may not be constant depending on your configuration.  Do this with
> snmpwalk -c community hostname 1.3.6.1.2.1.2

Interesting.  Here's the results, ellipsisized to indicate
duplicity/repetitiveness:

IF-MIB::ifNumber.0 = INTEGER: 71
IF-MIB::ifIndex.0 = INTEGER: 0
IF-MIB::ifIndex.1 = INTEGER: 1
IF-MIB::ifIndex.2 = INTEGER: 2
...
IF-MIB::ifIndex.83 = INTEGER: 83
IF-MIB::ifIndex.84 = INTEGER: 84
IF-MIB::ifIndex.85 = INTEGER: 85
IF-MIB::ifDescr.0 = STRING: ppp0
IF-MIB::ifDescr.1 = STRING: lo
IF-MIB::ifDescr.2 = STRING: eth0
IF-MIB::ifDescr.3 = STRING: eth1
IF-MIB::ifDescr.4 = STRING: eth0.0
IF-MIB::ifDescr.5 = STRING: eth0.1
IF-MIB::ifDescr.6 = STRING: eth0.2
IF-MIB::ifDescr.7 = STRING: br-lan
IF-MIB::ifDescr.9 = STRING: sit0
IF-MIB::ifDescr.10 = STRING: imq0
IF-MIB::ifDescr.11 = STRING: imq1
IF-MIB::ifDescr.12 = STRING: ppp0
IF-MIB::ifDescr.13 = STRING: tun0
IF-MIB::ifDescr.14 = STRING: sixxs
IF-MIB::ifDescr.15 = STRING: ppp0
IF-MIB::ifDescr.16 = STRING: ppp0
IF-MIB::ifDescr.17 = STRING: ppp0
...
IF-MIB::ifDescr.83 = STRING: ppp0
IF-MIB::ifDescr.84 = STRING: ppp0
IF-MIB::ifDescr.85 = STRING: ppp0
IF-MIB::ifType.0 = INTEGER: ppp(23)
IF-MIB::ifType.1 = INTEGER: softwareLoopback(24)
IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.3 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.4 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.5 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.6 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.7 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifType.9 = INTEGER: tunnel(131)
IF-MIB::ifType.10 = INTEGER: other(1)
IF-MIB::ifType.11 = INTEGER: other(1)
IF-MIB::ifType.12 = INTEGER: ppp(23)
IF-MIB::ifType.13 = INTEGER: other(1)
IF-MIB::ifType.14 = INTEGER: tunnel(131)
IF-MIB::ifType.15 = INTEGER: ppp(23)
IF-MIB::ifType.16 = INTEGER: ppp(23)
IF-MIB::ifType.17 = INTEGER: ppp(23)
...
IF-MIB::ifType.83 = INTEGER: ppp(23)
IF-MIB::ifType.84 = INTEGER: ppp(23)
IF-MIB::ifType.85 = INTEGER: ppp(23)
IF-MIB::ifMtu.0 = INTEGER: 0
IF-MIB::ifMtu.1 = INTEGER: 16436
IF-MIB::ifMtu.2 = INTEGER: 1500
IF-MIB::ifMtu.3 = INTEGER: 1500
IF-MIB::ifMtu.4 = INTEGER: 1500
IF-MIB::ifMtu.5 = INTEGER: 1500
IF-MIB::ifMtu.6 = INTEGER: 1500
IF-MIB::ifMtu.7 = INTEGER: 1500
IF-MIB::ifMtu.9 = INTEGER: 1480
IF-MIB::ifMtu.10 = INTEGER: 16000
IF-MIB::ifMtu.11 = INTEGER: 16000
IF-MIB::ifMtu.12 = INTEGER: 1452
IF-MIB::ifMtu.13 = INTEGER: 1500
IF-MIB::ifMtu.14 = INTEGER: 1280
IF-MIB::ifMtu.15 = INTEGER: 1452
IF-MIB::ifMtu.16 = INTEGER: 1452
IF-MIB::ifMtu.17 = INTEGER: 1492
...
IF-MIB::ifMtu.62 = INTEGER: 1492
IF-MIB::ifMtu.63 = INTEGER: 1492
IF-MIB::ifMtu.64 = INTEGER: 1492
IF-MIB::ifMtu.66 = INTEGER: 1500
IF-MIB::ifMtu.67 = INTEGER: 1492
IF-MIB::ifMtu.69 = INTEGER: 1492
IF-MIB::ifMtu.70 = INTEGER: 1492
...
IF-MIB::ifMtu.77 = INTEGER: 1492
IF-MIB::ifMtu.78 = INTEGER: 1492
IF-MIB::ifMtu.80 = INTEGER: 1492
IF-MIB::ifMtu.81 = INTEGER: 1452
IF-MIB::ifMtu.82 = INTEGER: 1492
IF-MIB::ifMtu.83 = INTEGER: 1452
IF-MIB::ifMtu.84 = INTEGER: 1492
IF-MIB::ifMtu.85 = INTEGER: 1452
IF-MIB::ifSpeed.0 = Gauge32: 0
IF-MIB::ifSpeed.1 = Gauge32: 10000000
IF-MIB::ifSpeed.2 = Gauge32: 100000000
IF-MIB::ifSpeed.3 = Gauge32: 10000000
IF-MIB::ifSpeed.4 = Gauge32: 100000000
IF-MIB::ifSpeed.5 = Gauge32: 100000000
IF-MIB::ifSpeed.6 = Gauge32: 100000000
IF-MIB::ifSpeed.7 = Gauge32: 10000000
IF-MIB::ifSpeed.9 = Gauge32: 0
IF-MIB::ifSpeed.10 = Gauge32: 0
IF-MIB::ifSpeed.11 = Gauge32: 0
IF-MIB::ifSpeed.12 = Gauge32: 0
IF-MIB::ifSpeed.13 = Gauge32: 0
IF-MIB::ifSpeed.14 = Gauge32: 0
IF-MIB::ifSpeed.15 = Gauge32: 0
IF-MIB::ifSpeed.16 = Gauge32: 0
IF-MIB::ifSpeed.17 = Gauge32: 0
...
IF-MIB::ifSpeed.83 = Gauge32: 0
IF-MIB::ifSpeed.84 = Gauge32: 0
IF-MIB::ifSpeed.85 = Gauge32: 0
IF-MIB::ifPhysAddress.0 = STRING: 
IF-MIB::ifPhysAddress.1 = STRING: 
IF-MIB::ifPhysAddress.2 = STRING: 0:9d:10:41:5f:7a
IF-MIB::ifPhysAddress.3 = STRING: 30:12:15:10:40:1d
IF-MIB::ifPhysAddress.4 = STRING: 0:9d:10:41:5f:7a
IF-MIB::ifPhysAddress.5 = STRING: 0:9d:10:41:5f:7a
IF-MIB::ifPhysAddress.6 = STRING: 0:9d:10:41:5f:7a
IF-MIB::ifPhysAddress.7 = STRING: 0:9d:10:41:5f:7a
IF-MIB::ifPhysAddress.9 = STRING: 
IF-MIB::ifPhysAddress.10 = STRING: 
IF-MIB::ifPhysAddress.11 = STRING: 
IF-MIB::ifPhysAddress.12 = STRING: 
IF-MIB::ifPhysAddress.13 = STRING: 
IF-MIB::ifPhysAddress.14 = STRING: 13:a1:a5:10:21:56
IF-MIB::ifPhysAddress.15 = STRING: 
IF-MIB::ifPhysAddress.16 = STRING: 
IF-MIB::ifPhysAddress.17 = STRING: 
...
IF-MIB::ifPhysAddress.83 = STRING: 
IF-MIB::ifPhysAddress.84 = STRING: 
IF-MIB::ifPhysAddress.85 = STRING: 
IF-MIB::ifAdminStatus.0 = INTEGER: down(2)
IF-MIB::ifAdminStatus.1 = INTEGER: up(1)
IF-MIB::ifAdminStatus.2 = INTEGER: up(1)
IF-MIB::ifAdminStatus.3 = INTEGER: down(2)
IF-MIB::ifAdminStatus.4 = INTEGER: up(1)
IF-MIB::ifAdminStatus.5 = INTEGER: up(1)
IF-MIB::ifAdminStatus.6 = INTEGER: up(1)
IF-MIB::ifAdminStatus.7 = INTEGER: up(1)
IF-MIB::ifAdminStatus.9 = INTEGER: down(2)
IF-MIB::ifAdminStatus.10 = INTEGER: down(2)
IF-MIB::ifAdminStatus.11 = INTEGER: down(2)
IF-MIB::ifAdminStatus.12 = INTEGER: down(2)
IF-MIB::ifAdminStatus.13 = INTEGER: up(1)
IF-MIB::ifAdminStatus.14 = INTEGER: up(1)
IF-MIB::ifAdminStatus.15 = INTEGER: down(2)
IF-MIB::ifAdminStatus.16 = INTEGER: down(2)
IF-MIB::ifAdminStatus.17 = INTEGER: down(2)
...
IF-MIB::ifAdminStatus.82 = INTEGER: down(2)
IF-MIB::ifAdminStatus.83 = INTEGER: down(2)
IF-MIB::ifAdminStatus.84 = INTEGER: down(2)
IF-MIB::ifAdminStatus.85 = INTEGER: up(1)
IF-MIB::ifOperStatus.0 = INTEGER: down(2)
IF-MIB::ifOperStatus.1 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.3 = INTEGER: down(2)
IF-MIB::ifOperStatus.4 = INTEGER: up(1)
IF-MIB::ifOperStatus.5 = INTEGER: up(1)
IF-MIB::ifOperStatus.6 = INTEGER: up(1)
IF-MIB::ifOperStatus.7 = INTEGER: up(1)
IF-MIB::ifOperStatus.9 = INTEGER: down(2)
IF-MIB::ifOperStatus.10 = INTEGER: down(2)
IF-MIB::ifOperStatus.11 = INTEGER: down(2)
IF-MIB::ifOperStatus.12 = INTEGER: down(2)
IF-MIB::ifOperStatus.13 = INTEGER: up(1)
IF-MIB::ifOperStatus.14 = INTEGER: up(1)
IF-MIB::ifOperStatus.15 = INTEGER: down(2)
IF-MIB::ifOperStatus.16 = INTEGER: down(2)
IF-MIB::ifOperStatus.17 = INTEGER: down(2)
...
IF-MIB::ifOperStatus.82 = INTEGER: down(2)
IF-MIB::ifOperStatus.83 = INTEGER: down(2)
IF-MIB::ifOperStatus.84 = INTEGER: down(2)
IF-MIB::ifOperStatus.85 = INTEGER: up(1)
IF-MIB::ifLastChange.0 = Timeticks: (795635329) 92 days, 2:05:53.29
IF-MIB::ifLastChange.1 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.2 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.3 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.4 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.5 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.6 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.7 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.9 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.10 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.11 = Timeticks: (0) 0:00:00.00
IF-MIB::ifLastChange.12 = Timeticks: (722823322) 83 days, 15:50:33.22
IF-MIB::ifLastChange.13 = Timeticks: (1551) 0:00:15.51
IF-MIB::ifLastChange.14 = Timeticks: (662379360) 76 days, 15:56:33.60
IF-MIB::ifLastChange.15 = Timeticks: (783307707) 90 days, 15:51:17.07
IF-MIB::ifLastChange.16 = Timeticks: (795320287) 92 days, 1:13:22.87
IF-MIB::ifLastChange.17 = Timeticks: (795324787) 92 days, 1:14:07.87
IF-MIB::ifLastChange.18 = Timeticks: (795330788) 92 days, 1:15:07.88
IF-MIB::ifLastChange.19 = Timeticks: (795336789) 92 days, 1:16:07.89
IF-MIB::ifLastChange.20 = Timeticks: (795342790) 92 days, 1:17:07.90
IF-MIB::ifLastChange.21 = Timeticks: (795348789) 92 days, 1:18:07.89
IF-MIB::ifLastChange.22 = Timeticks: (795353291) 92 days, 1:18:52.91
IF-MIB::ifLastChange.23 = Timeticks: (795357792) 92 days, 1:19:37.92
IF-MIB::ifLastChange.24 = Timeticks: (795363793) 92 days, 1:20:37.93
IF-MIB::ifLastChange.29 = Timeticks: (795392297) 92 days, 1:25:22.97
IF-MIB::ifLastChange.30 = Timeticks: (795398298) 92 days, 1:26:22.98
IF-MIB::ifLastChange.31 = Timeticks: (795426800) 92 days, 1:31:08.00
IF-MIB::ifLastChange.32 = Timeticks: (795459804) 92 days, 1:36:38.04
IF-MIB::ifLastChange.33 = Timeticks: (795492808) 92 days, 1:42:08.08
IF-MIB::ifLastChange.35 = Timeticks: (795525814) 92 days, 1:47:38.14
IF-MIB::ifLastChange.36 = Timeticks: (795528813) 92 days, 1:48:08.13
IF-MIB::ifLastChange.38 = Timeticks: (795564818) 92 days, 1:54:08.18
IF-MIB::ifLastChange.39 = Timeticks: (795597824) 92 days, 1:59:38.24
IF-MIB::ifLastChange.40 = Timeticks: (795630828) 92 days, 2:05:08.28
IF-MIB::ifLastChange.41 = Timeticks: (795665333) 92 days, 2:10:53.33
IF-MIB::ifLastChange.42 = Timeticks: (795698337) 92 days, 2:16:23.37
IF-MIB::ifLastChange.43 = Timeticks: (795731340) 92 days, 2:21:53.40
IF-MIB::ifLastChange.44 = Timeticks: (811751201) 93 days, 22:51:52.01
IF-MIB::ifLastChange.45 = Timeticks: (811763203) 93 days, 22:53:52.03
IF-MIB::ifLastChange.46 = Timeticks: (838725986) 97 days, 1:47:39.86
IF-MIB::ifLastChange.47 = Timeticks: (838728987) 97 days, 1:48:09.87
IF-MIB::ifLastChange.48 = Timeticks: (838734988) 97 days, 1:49:09.88
IF-MIB::ifLastChange.49 = Timeticks: (838742490) 97 days, 1:50:24.90
IF-MIB::ifLastChange.50 = Timeticks: (838748492) 97 days, 1:51:24.92
IF-MIB::ifLastChange.51 = Timeticks: (838754494) 97 days, 1:52:24.94
IF-MIB::ifLastChange.52 = Timeticks: (838760495) 97 days, 1:53:24.95
IF-MIB::ifLastChange.53 = Timeticks: (838764998) 97 days, 1:54:09.98
IF-MIB::ifLastChange.54 = Timeticks: (838770999) 97 days, 1:55:09.99
IF-MIB::ifLastChange.57 = Timeticks: (838796504) 97 days, 1:59:25.04
IF-MIB::ifLastChange.58 = Timeticks: (838798006) 97 days, 1:59:40.06
IF-MIB::ifLastChange.59 = Timeticks: (838804007) 97 days, 2:00:40.07
IF-MIB::ifLastChange.60 = Timeticks: (838834015) 97 days, 2:05:40.15
IF-MIB::ifLastChange.61 = Timeticks: (838867024) 97 days, 2:11:10.24
IF-MIB::ifLastChange.62 = Timeticks: (838900032) 97 days, 2:16:40.32
IF-MIB::ifLastChange.63 = Timeticks: (838933041) 97 days, 2:22:10.41
IF-MIB::ifLastChange.64 = Timeticks: (838966052) 97 days, 2:27:40.52
IF-MIB::ifLastChange.66 = Timeticks: (839030567) 97 days, 2:38:25.67
IF-MIB::ifLastChange.67 = Timeticks: (839032068) 97 days, 2:38:40.68
IF-MIB::ifLastChange.69 = Timeticks: (839069574) 97 days, 2:44:55.74
IF-MIB::ifLastChange.70 = Timeticks: (839102578) 97 days, 2:50:25.78
IF-MIB::ifLastChange.71 = Timeticks: (839135583) 97 days, 2:55:55.83
IF-MIB::ifLastChange.72 = Timeticks: (839170087) 97 days, 3:01:40.87
IF-MIB::ifLastChange.76 = Timeticks: (839236099) 97 days, 3:12:40.99
IF-MIB::ifLastChange.77 = Timeticks: (839242102) 97 days, 3:13:41.02
IF-MIB::ifLastChange.78 = Timeticks: (839275101) 97 days, 3:19:11.01
IF-MIB::ifLastChange.80 = Timeticks: (839308107) 97 days, 3:24:41.07
IF-MIB::ifLastChange.81 = Timeticks: (876400438) 101 days, 10:26:44.38
IF-MIB::ifLastChange.82 = Timeticks: (876403435) 101 days, 10:27:14.35
IF-MIB::ifLastChange.83 = Timeticks: (876665963) 101 days, 11:10:59.63
IF-MIB::ifLastChange.84 = Timeticks: (876670464) 101 days, 11:11:44.64
IF-MIB::ifLastChange.85 = Timeticks: (876676466) 101 days, 11:12:44.66
IF-MIB::ifInOctets.0 = Counter32: 0
IF-MIB::ifInOctets.1 = Counter32: 114681
IF-MIB::ifInOctets.2 = Counter32: 4047002120
IF-MIB::ifInOctets.3 = Counter32: 0
IF-MIB::ifInOctets.4 = Counter32: 3980042172
IF-MIB::ifInOctets.5 = Counter32: 4285883638
IF-MIB::ifInOctets.6 = Counter32: 1478688499
IF-MIB::ifInOctets.7 = Counter32: 3593731476
IF-MIB::ifInOctets.9 = Counter32: 0
IF-MIB::ifInOctets.10 = Counter32: 0
IF-MIB::ifInOctets.11 = Counter32: 0
IF-MIB::ifInOctets.12 = Counter32: 1096234155
IF-MIB::ifInOctets.13 = Counter32: 406444066
IF-MIB::ifInOctets.14 = Counter32: 771621468
IF-MIB::ifInOctets.15 = Counter32: 134825482
IF-MIB::ifInOctets.16 = Counter32: 742989
IF-MIB::ifInOctets.17 = Counter32: 0
IF-MIB::ifInOctets.18 = Counter32: 0
IF-MIB::ifInOctets.19 = Counter32: 0
...
IF-MIB::ifInOctets.41 = Counter32: 0
IF-MIB::ifInOctets.42 = Counter32: 0
IF-MIB::ifInOctets.43 = Counter32: 0
IF-MIB::ifInOctets.44 = Counter32: 3423220
IF-MIB::ifInOctets.45 = Counter32: 80
IF-MIB::ifInOctets.46 = Counter32: 4706622
IF-MIB::ifInOctets.47 = Counter32: 0
IF-MIB::ifInOctets.48 = Counter32: 0
IF-MIB::ifInOctets.49 = Counter32: 0
...
IF-MIB::ifInOctets.77 = Counter32: 0
IF-MIB::ifInOctets.78 = Counter32: 0
IF-MIB::ifInOctets.80 = Counter32: 0
IF-MIB::ifInOctets.81 = Counter32: 75302225
IF-MIB::ifInOctets.82 = Counter32: 0
IF-MIB::ifInOctets.83 = Counter32: 53772
IF-MIB::ifInOctets.84 = Counter32: 0
IF-MIB::ifInOctets.85 = Counter32: 6807092
IF-MIB::ifInUcastPkts.0 = Counter32: 0
IF-MIB::ifInUcastPkts.1 = Counter32: 824
IF-MIB::ifInUcastPkts.2 = Counter32: 159501023
IF-MIB::ifInUcastPkts.3 = Counter32: 0
IF-MIB::ifInUcastPkts.4 = Counter32: 91368774
IF-MIB::ifInUcastPkts.5 = Counter32: 61410601
IF-MIB::ifInUcastPkts.6 = Counter32: 4586997
IF-MIB::ifInUcastPkts.7 = Counter32: 91087631
IF-MIB::ifInUcastPkts.9 = Counter32: 0
IF-MIB::ifInUcastPkts.10 = Counter32: 0
IF-MIB::ifInUcastPkts.11 = Counter32: 0
IF-MIB::ifInUcastPkts.12 = Counter32: 1408280
IF-MIB::ifInUcastPkts.13 = Counter32: 8190938
IF-MIB::ifInUcastPkts.14 = Counter32: 4224329
IF-MIB::ifInUcastPkts.15 = Counter32: 251076
IF-MIB::ifInUcastPkts.16 = Counter32: 13188
IF-MIB::ifInUcastPkts.17 = Counter32: 0
IF-MIB::ifInUcastPkts.18 = Counter32: 0
IF-MIB::ifInUcastPkts.19 = Counter32: 0
...
IF-MIB::ifInUcastPkts.41 = Counter32: 0
IF-MIB::ifInUcastPkts.42 = Counter32: 0
IF-MIB::ifInUcastPkts.43 = Counter32: 0
IF-MIB::ifInUcastPkts.44 = Counter32: 23681
IF-MIB::ifInUcastPkts.45 = Counter32: 3
IF-MIB::ifInUcastPkts.46 = Counter32: 38861
IF-MIB::ifInUcastPkts.47 = Counter32: 0
IF-MIB::ifInUcastPkts.48 = Counter32: 0
IF-MIB::ifInUcastPkts.49 = Counter32: 0
...
IF-MIB::ifInUcastPkts.77 = Counter32: 0
IF-MIB::ifInUcastPkts.78 = Counter32: 0
IF-MIB::ifInUcastPkts.80 = Counter32: 0
IF-MIB::ifInUcastPkts.81 = Counter32: 147917
IF-MIB::ifInUcastPkts.82 = Counter32: 0
IF-MIB::ifInUcastPkts.83 = Counter32: 293
IF-MIB::ifInUcastPkts.84 = Counter32: 0
IF-MIB::ifInUcastPkts.85 = Counter32: 42038
IF-MIB::ifInNUcastPkts.0 = Counter32: 0
IF-MIB::ifInNUcastPkts.1 = Counter32: 0
IF-MIB::ifInNUcastPkts.2 = Counter32: 284626
IF-MIB::ifInNUcastPkts.3 = Counter32: 0
IF-MIB::ifInNUcastPkts.4 = Counter32: 2209670
IF-MIB::ifInNUcastPkts.5 = Counter32: 13
IF-MIB::ifInNUcastPkts.6 = Counter32: 0
IF-MIB::ifInNUcastPkts.7 = Counter32: 2472442
IF-MIB::ifInNUcastPkts.9 = Counter32: 0
IF-MIB::ifInNUcastPkts.10 = Counter32: 0
IF-MIB::ifInNUcastPkts.11 = Counter32: 0
...
IF-MIB::ifInNUcastPkts.83 = Counter32: 0
IF-MIB::ifInNUcastPkts.84 = Counter32: 0
IF-MIB::ifInNUcastPkts.85 = Counter32: 0
IF-MIB::ifInDiscards.0 = Counter32: 0
IF-MIB::ifInDiscards.1 = Counter32: 0
IF-MIB::ifInDiscards.2 = Counter32: 645
IF-MIB::ifInDiscards.3 = Counter32: 0
IF-MIB::ifInDiscards.4 = Counter32: 0
IF-MIB::ifInDiscards.5 = Counter32: 0
...
IF-MIB::ifInDiscards.83 = Counter32: 0
IF-MIB::ifInDiscards.84 = Counter32: 0
IF-MIB::ifInDiscards.85 = Counter32: 0
IF-MIB::ifInErrors.0 = Counter32: 0
IF-MIB::ifInErrors.1 = Counter32: 0
IF-MIB::ifInErrors.2 = Counter32: 0
...
IF-MIB::ifInErrors.83 = Counter32: 0
IF-MIB::ifInErrors.84 = Counter32: 0
IF-MIB::ifInErrors.85 = Counter32: 0
IF-MIB::ifInUnknownProtos.0 = Counter32: 0
IF-MIB::ifInUnknownProtos.1 = Counter32: 0
IF-MIB::ifInUnknownProtos.2 = Counter32: 0
...
IF-MIB::ifInUnknownProtos.83 = Counter32: 0
IF-MIB::ifInUnknownProtos.84 = Counter32: 0
IF-MIB::ifInUnknownProtos.85 = Counter32: 0
IF-MIB::ifOutOctets.0 = Counter32: 0
IF-MIB::ifOutOctets.1 = Counter32: 114681
IF-MIB::ifOutOctets.2 = Counter32: 1503656592
IF-MIB::ifOutOctets.3 = Counter32: 0
IF-MIB::ifOutOctets.4 = Counter32: 2912481720
IF-MIB::ifOutOctets.5 = Counter32: 1200415254
IF-MIB::ifOutOctets.6 = Counter32: 857878561
IF-MIB::ifOutOctets.7 = Counter32: 2372533298
IF-MIB::ifOutOctets.9 = Counter32: 0
IF-MIB::ifOutOctets.10 = Counter32: 0
IF-MIB::ifOutOctets.11 = Counter32: 0
IF-MIB::ifOutOctets.12 = Counter32: 567889207
IF-MIB::ifOutOctets.13 = Counter32: 654693894
IF-MIB::ifOutOctets.14 = Counter32: 276320109
IF-MIB::ifOutOctets.15 = Counter32: 117171045
IF-MIB::ifOutOctets.16 = Counter32: 20
IF-MIB::ifOutOctets.17 = Counter32: 0
IF-MIB::ifOutOctets.18 = Counter32: 0
IF-MIB::ifOutOctets.19 = Counter32: 0
...
IF-MIB::ifOutOctets.41 = Counter32: 0
IF-MIB::ifOutOctets.42 = Counter32: 0
IF-MIB::ifOutOctets.43 = Counter32: 0
IF-MIB::ifOutOctets.44 = Counter32: 2483280
IF-MIB::ifOutOctets.45 = Counter32: 20
IF-MIB::ifOutOctets.46 = Counter32: 2638074
IF-MIB::ifOutOctets.47 = Counter32: 0
IF-MIB::ifOutOctets.48 = Counter32: 0
IF-MIB::ifOutOctets.49 = Counter32: 0
...
IF-MIB::ifOutOctets.77 = Counter32: 0
IF-MIB::ifOutOctets.78 = Counter32: 0
IF-MIB::ifOutOctets.80 = Counter32: 0
IF-MIB::ifOutOctets.81 = Counter32: 26362952
IF-MIB::ifOutOctets.82 = Counter32: 0
IF-MIB::ifOutOctets.83 = Counter32: 47297
IF-MIB::ifOutOctets.84 = Counter32: 0
IF-MIB::ifOutOctets.85 = Counter32: 5500506
IF-MIB::ifOutUcastPkts.0 = Counter32: 0
IF-MIB::ifOutUcastPkts.1 = Counter32: 824
IF-MIB::ifOutUcastPkts.2 = Counter32: 184362486
IF-MIB::ifOutUcastPkts.3 = Counter32: 0
IF-MIB::ifOutUcastPkts.4 = Counter32: 134986956
IF-MIB::ifOutUcastPkts.5 = Counter32: 44998436
IF-MIB::ifOutUcastPkts.6 = Counter32: 4365944
IF-MIB::ifOutUcastPkts.7 = Counter32: 134986949
IF-MIB::ifOutUcastPkts.9 = Counter32: 0
IF-MIB::ifOutUcastPkts.10 = Counter32: 0
IF-MIB::ifOutUcastPkts.11 = Counter32: 0
IF-MIB::ifOutUcastPkts.12 = Counter32: 1251477
IF-MIB::ifOutUcastPkts.13 = Counter32: 6922350
IF-MIB::ifOutUcastPkts.14 = Counter32: 3505897
IF-MIB::ifOutUcastPkts.15 = Counter32: 244177
IF-MIB::ifOutUcastPkts.16 = Counter32: 2
IF-MIB::ifOutUcastPkts.17 = Counter32: 0
IF-MIB::ifOutUcastPkts.18 = Counter32: 0
IF-MIB::ifOutUcastPkts.19 = Counter32: 0
...
IF-MIB::ifOutUcastPkts.41 = Counter32: 0
IF-MIB::ifOutUcastPkts.42 = Counter32: 0
IF-MIB::ifOutUcastPkts.43 = Counter32: 0
IF-MIB::ifOutUcastPkts.44 = Counter32: 20011
IF-MIB::ifOutUcastPkts.45 = Counter32: 2
IF-MIB::ifOutUcastPkts.46 = Counter32: 17419
IF-MIB::ifOutUcastPkts.47 = Counter32: 0
IF-MIB::ifOutUcastPkts.48 = Counter32: 0
IF-MIB::ifOutUcastPkts.49 = Counter32: 0
...
IF-MIB::ifOutUcastPkts.77 = Counter32: 0
IF-MIB::ifOutUcastPkts.78 = Counter32: 0
IF-MIB::ifOutUcastPkts.80 = Counter32: 0
IF-MIB::ifOutUcastPkts.81 = Counter32: 124350
IF-MIB::ifOutUcastPkts.82 = Counter32: 0
IF-MIB::ifOutUcastPkts.83 = Counter32: 322
IF-MIB::ifOutUcastPkts.84 = Counter32: 0
IF-MIB::ifOutUcastPkts.85 = Counter32: 45043
IF-MIB::ifOutNUcastPkts.0 = Counter32: 0
IF-MIB::ifOutNUcastPkts.1 = Counter32: 0
IF-MIB::ifOutNUcastPkts.2 = Counter32: 0
...
IF-MIB::ifOutNUcastPkts.83 = Counter32: 0
IF-MIB::ifOutNUcastPkts.84 = Counter32: 0
IF-MIB::ifOutNUcastPkts.85 = Counter32: 0
IF-MIB::ifOutDiscards.0 = Counter32: 0
IF-MIB::ifOutDiscards.1 = Counter32: 0
IF-MIB::ifOutDiscards.2 = Counter32: 0
...
IF-MIB::ifOutDiscards.10 = Counter32: 0
IF-MIB::ifOutDiscards.11 = Counter32: 0
IF-MIB::ifOutDiscards.12 = Counter32: 0
IF-MIB::ifOutDiscards.13 = Counter32: 2092
IF-MIB::ifOutDiscards.14 = Counter32: 0
IF-MIB::ifOutDiscards.15 = Counter32: 0
IF-MIB::ifOutDiscards.16 = Counter32: 0
...
IF-MIB::ifOutDiscards.83 = Counter32: 0
IF-MIB::ifOutDiscards.84 = Counter32: 0
IF-MIB::ifOutDiscards.85 = Counter32: 0
IF-MIB::ifOutErrors.0 = Counter32: 0
IF-MIB::ifOutErrors.1 = Counter32: 0
IF-MIB::ifOutErrors.2 = Counter32: 0
...
IF-MIB::ifOutErrors.83 = Counter32: 0
IF-MIB::ifOutErrors.84 = Counter32: 0
IF-MIB::ifOutErrors.85 = Counter32: 0
IF-MIB::ifOutQLen.0 = Gauge32: 0
IF-MIB::ifOutQLen.1 = Gauge32: 0
IF-MIB::ifOutQLen.2 = Gauge32: 0
...
IF-MIB::ifOutQLen.83 = Gauge32: 0
IF-MIB::ifOutQLen.84 = Gauge32: 0
IF-MIB::ifOutQLen.85 = Gauge32: 0
IF-MIB::ifSpecific.0 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.1 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.2 = OID: SNMPv2-SMI::zeroDotZero
...
IF-MIB::ifSpecific.83 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.84 = OID: SNMPv2-SMI::zeroDotZero
IF-MIB::ifSpecific.85 = OID: SNMPv2-SMI::zeroDotZero

Probably way more than you needed to see, but it should be abundantly
clear that all of the up/down of ppp0 has resulted in lots of interfaces
being enumerated with the current active ppp0 being on index 85.

Is there something about this that mrtg doesn't like?

> Make sure you're on the latest MRTG (2.16.2 I think)

2.16.2-5ubuntu1 to be exact, so yes, it looks to be the case.

Thots?

b.

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