[cisco-bba] strange PPPoE virtual-access interface

[Tassos Chatzithomaoglou]

I have noticed that after booting a 7200 a "strange" virtual-access interface is created, 
although no actual users exist in the router.
This va interface is said to be a PPPoE interface, but i don't have any pppoe config on 
the router, just L2TP termination.

Nov 20 17:42:01: %SYS-5-RESTART: System restarted --
Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-IS-M), Version 12.2(15)T9,  RELEASE SOFTWARE (fc2)
TAC Support: http://www.cisco.com/tac
Copyright (c) 1986-2003 by cisco Systems, Inc.
Compiled Sat 01-Nov-03 01:10 by ccai
Nov 20 17:42:01: %SNMP-5-COLDSTART: SNMP agent on host router is undergoing a cold start
Nov 20 17:42:01: %LINK-3-UPDOWN: Interface Virtual-Access1, changed state to up
Nov 20 17:42:01: %SYS-6-BOOTTIME: Time taken to reboot after reload = 1069342922 seconds
Nov 20 17:42:02: %LINEPROTO-5-UPDOWN: Line protocol on Interface Virtual-Access1, changed 
state to up


router#sh int virtual-access 1
Virtual-Access1 is up, line protocol is up
   Hardware is Virtual Access interface
   MTU 1492 bytes, BW 100000 Kbit, DLY 100000 usec,
      reliability 255/255, txload 1/255, rxload 1/255
   Base PPPoE vaccess, loopback not set
   DTR is pulsed for 5 seconds on reset
   Last input never, output never, output hang never
   Last clearing of "show interface" counters 00:17:56
   Input queue: 0/4096/0/0 (size/max/drops/flushes); Total output drops: 0
   Queueing strategy: fifo
   Output queue: 0/40 (size/max)
   5 minute input rate 0 bits/sec, 0 packets/sec
   5 minute output rate 0 bits/sec, 0 packets/sec
      0 packets input, 0 bytes, 0 no buffer
      Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
      0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
      0 packets output, 0 bytes, 0 underruns
      0 output errors, 0 collisions, 0 interface resets
      0 output buffer failures, 0 output buffers swapped out
      0 carrier transitions


router#sh int virtual-access 1 configuration
Virtual-Access1 is a PPP over Ethernet link (sub)interface

Derived configuration : 61 bytes
!
interface Virtual-Access1
  no ip address
  ip mtu 1500
end

router#sh vtemplate
Virtual access subinterface creation is globally disabled

          Active     Active    Subint  Pre-clone Pre-clone
        Interface Subinterface Capable Available   Limit
        --------- ------------ ------- --------- ---------
Vt1            0            0    No          --        --
Vt2            0            0    No          --        --

Usage Summary
                       Interface   Subinterface
                       ---------   ------------
Current in use                1              0
Current free                  0              0
Total                         1              0


router#sh pppoe session all
Total PPPoE sessions 0

PPPoE Session Information

-- 
***********************************
    Chatzithomaoglou Anastasios
Network Design & Operations Center
           FORTHnet S.A.
       <achatz at forthnet.gr>
***********************************