sip0 is a GRE tunnel between the router and the colo box in Seattle, the payload of which is encapsulated as ipsec traffic before being transmitted over the Ubiquity equipment to the switch that the CenturyLink DSL modem attaches to. I don’t get centurylink easter eggs in my search results when I use this interface.

eth9 is the local gigabit transceiver. Attached directly to a SIP phone which bridges to a gigabit switch, on which the Ubiquity equipment participates.

lo is the local loopback interface, of course. Good old 127/8

usb1 is the 100Mbit USB NIC to which the WRT54G with ssid ‘colliertech.org’ is attached. The vast majority of the traffic originates on this interface.

cjac@wanjet1:~$ uptime
 09:11:18 up 32 days, 18:33,  6 users,  load average: 0.00, 0.01, 0.05
cjac@wanjet1:~$ sudo ifconfig
[sudo] password for cjac: 
eth9      Link encap:Ethernet  HWaddr 00:26:b9:e3:9b:47  
          inet addr:10.0.0.7  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::226:b9ff:fee3:9b47/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:176060020 errors:4 dropped:12 overruns:0 frame:2
          TX packets:131573705 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:216753073131 (201.8 GiB)  TX bytes:30777442696 (28.6 GiB)
          Interrupt:20 Memory:f5400000-f5420000 

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:3423 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3423 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:392714 (383.5 KiB)  TX bytes:392714 (383.5 KiB)

sip0      Link encap:UNSPEC  HWaddr 64-40-6A-02-30-30-3A-30-00-00-00-00-00-00-00-00  
          inet addr:100.64.107.2  P-t-P:100.64.107.1  Mask:255.255.255.252
          inet6 addr: fe80::200:5efe:6440:6a02/64 Scope:Link
          inet6 addr: 2607:ff08:f5:1338::6440:6b02/126 Scope:Global
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1414  Metric:1
          RX packets:468792 errors:0 dropped:0 overruns:0 frame:0
          TX packets:297314 errors:30556 dropped:5 overruns:0 carrier:30549
          collisions:0 txqueuelen:0 
          RX bytes:512744498 (488.9 MiB)  TX bytes:21652345 (20.6 MiB)

usb1      Link encap:Ethernet  HWaddr 40:3c:fc:01:35:a5  
          inet addr:172.16.67.1  Bcast:0.0.0.0  Mask:255.255.255.0
          inet6 addr: fe80::423c:fcff:fe01:35a5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:131960908 errors:0 dropped:0 overruns:0 frame:0
          TX packets:175522396 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:28447118558 (26.4 GiB)  TX bytes:216131320364 (201.2 GiB)