What are "tunnel boards"?

[il barbi]

I've got an Acer notebook with Vista I can't connect to a D-Link router. By
keying ipconfig /all I can see the Ethernet LAN board and the wireless
Broadcom board and also 3 other "boards" that I don't see in Device
Management, namely:
- Tunnel board for connection to local network (LAN)*, device
status=disconnected, description: isatap {guid of the wireless board},
physical address 00-00-00-00-00-00-00-E0, DHCP enabled=no, automatic
configuration enabled=yes
- Tunnel board for connection to local network (LAN)*2, device
status=disconnected, description: isatap {guid of the Ethernet board},
physical address 00-00-00-00-00-00-00-E0, DHCP enabled=no, automatic
configuration enabled=yes
- Tunnel board for connection to local network (LAN)*, device
status=disconnected, description: Teredo Tunneling Pseudo-Interface,
physical address 02-00-54-55-4E-01, DHCP enabled=no, automatic configuration
enabled=yes

what are these tunnel boards? is there something wrong?

il barbi

 

[Robert L. \(MS-MVP\)]

That is normal. If you do want to disable them, this how to may help,

How to disable IPv6 and Tunnel on ...However, you can disable IPv6 in
Windows Vista by doing one of the following: ... does not disable IPv6 on
tunnel interfaces or the IPv6 loopback interface. ...
www.chicagotech.net/netforums/viewtopic.php?p=3493


--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com

 

[Michael Walraven]

I have two 'tunneling' devices listed, do not have the
duplicate ----00-00-0e one. Having the tunneling connections is normal.
(Except for your duplicate which may be a problem).

The exact working on mine is different than yours I presume we have
different base languages (I am US english).
Also mine do not have the status disconnected statement. That may be because
my system is working and yours isn't (yet).

The entry that is most important is the first one for which is the actual
physical connection. I include my ipconfig /all for your reference

Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

...........................................................................
C:\Users\Walraven>ipconfig /all

Windows IP Configuration

Host Name . . . . . . . . . . . . : DESKTOP
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Desktop NIC:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Intel(R) 82566DC Gigabit Network
Connecti
on
Physical Address. . . . . . . . . : 00-19-D1-2A-70-E8
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . :
fe80::2dcf:f861:1669:f4e8%8(Preferred)
IPv4 Address. . . . . . . . . . . : 192.168.1.3(Preferred)
Subnet Mask . . . . . . . . . . . : 255.255.255.0
Lease Obtained. . . . . . . . . . : Wednesday, November 28, 2007 7:58:29
AM
Lease Expires . . . . . . . . . . : Thursday, November 29, 2007 7:58:28
AM
Default Gateway . . . . . . . . . : 192.168.1.1
DHCP Server . . . . . . . . . . . : 192.168.1.1
DHCPv6 IAID . . . . . . . . . . . : 201333201
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Enabled

Tunnel adapter Local Area Connection* 6:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Physical Address. . . . . . . . . : 02-00-54-55-4E-01
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
IPv6 Address. . . . . . . . . . . :
2001:0:4136:e38e:30f5:2e1f:b7ae:fe0(Prefe
rred)
Link-local IPv6 Address . . . . . : fe80::30f5:2e1f:b7ae:fe0%9(Preferred)
Default Gateway . . . . . . . . . : ::
NetBIOS over Tcpip. . . . . . . . : Disabled

Tunnel adapter Local Area Connection* 7:

Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft ISATAP Adapter
Physical Address. . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP Enabled. . . . . . . . . . . : No
Autoconfiguration Enabled . . . . : Yes
Link-local IPv6 Address . . . . . : fe80::5efe:192.168.1.3%10(Preferred)
Default Gateway . . . . . . . . . :
DNS Servers . . . . . . . . . . . : 192.168.1.1
NetBIOS over Tcpip. . . . . . . . : Disabled

C:\Users\Walraven>
...........................................................................................................

Important items when connected to a router is that DHCP is enabled, Auto
configuration is enabled, IPv4 address should be 192.168.x.y (mostly x
should be a 1 or a 0) Subnet mask should be 255.255.255.0, Default Gateway,
DHCP Server, and DNS server should be 192.168.x.1. There are exceptions to
all this but a 'standard' setup will look pretty much like this.

Also of course check the obvious: Does the light on the router for the link
port into which you have inserted the cable light up, and does the light
near the connector on the computer light up?

Michael
Vista Home premium

 

[il barbi]

I have two 'tunneling' devices listed, do not have the
duplicate ----00-00-0e one. Having the tunneling connections is normal.
(Except for your duplicate which may be a problem).

I don't think since most probably one applies to Ethernet wired LAN and the
other to Broadcom wireless board; now I learn "Teredo" device applies to
IPv6 protocol that is present only on Vista notebook (and I disabled it).
Now the wired LAN works fine while the wireless does not...:-( Anyway the 2
Tunneling items with ....00-0E address look the same, so I asked what the
devil they are - are they physical or logical ones? What is "Isatap
adapter"?
il barbi

 

[Michael Walraven]

I only have wired, no wireless so that is likely the cause of the missing
one on my machine.

The tunneling 'devices' are 'logical' devices that work thru physical
devices. I think that these devices provide the ability to use both IPv6 and
IPv4 addresses with the same physical network interface but don't actually
know.

No idea what isatap is.

The IPv6 protocol allows (among other things) vastly larger numbers of
'things' to have addresses. Unless you are on a corporate network it is very
unlikely that your computer can see any associated IPv6 points. Disabling
the IPv6 protocols should do no harm but is also unlikely to have any
beneficial effects, however some users have reported that it should be
disabled.

Michael