Time Capsule Interface List Per my other question on monitoring network throughput, I now have a series of graphs, some of which are distinctly non-obvious as to what they are.

Is there documentation on what every interface on a Time Capsule (in this case, current generation, 1TB Wireless N Base Station), pollable via SNMP are?

Here is the list that is available:

gec0 
ath0
ath1
wlan0
wlan1
wlan2
wlan3
vlan1
rxq0
gec0 and vlan1 are the most important for monitoring overall traffic flow. 

gec0 corresponds to the local traffic (behind the firewall) and vlan1 represents external traffic upstream to the internet. I haven't seen anything that makes sense what gec0 but on larger cisco switches they were internal routing queues where packets went to get headers constructed and routed across Vlans in the switching fabric. Perhaps it's the same on airport hardware.

athX are wireless vlans
wlanX are wired vlans

Apple used to publish MIBs for SNMP back when the first Airport Extremes were around but I don't know of anything better than using a generic MIB for the more recent hardware.

There used to be more information on these ports up at http://www.uname.nl/closer-look-airport-extreme/ but I can't find it anywhere (since archive.org respected it's robots.txt directive) - the best is a dated summary from http://gigo.com/archives/blog/monitoring-apples-80211n-airpo.html