538 CHAPTER 40: TUNNELING CONFIGURATION
DAD transmits 0
default site prefix length 48
# A link-local address (fe80::5efe:2.1.1.2) in the ISATAP format was automatically
generated for the ISATAP interface. Configure the IPv4 address of the ISATAP
switch on the ISATAP interface.
C:\>ipv6 rlu 2 2.1.1.1
# After carrying out the above command, look at the information on the ISATAP
interface.
C:\>ipv6 if 2
Interface 2: Automatic Tunneling Pseudo-Interface
Guid {48FCE3FC-EC30-E50E-F1A7-71172AEEE3AE}
does not use Neighbor Discovery
uses Router Discovery
routing preference 1
EUI-64 embedded IPv4 address: 2.1.1.2
router link-layer address: 2.1.1.1
preferred global 2001::5efe:2.1.1.2, life 29d23h59m46s/6d23h59m46s (public)
preferred link-local fe80::5efe:2.1.1.2, life infinite
link MTU 1500 (true link MTU 65515)
current hop limit 255
reachable time 42500ms (base 30000ms)
retransmission interval 1000ms
DAD transmits 0
default site prefix length 48
# By comparison, it is found that the host acquires the address prefix 2001::/64
and automatically generates the address 2001::5efe:2.1.1.2. Meanwhile, “uses
Switch Discovery” is displayed, indicating that the switch discovery function is
enabled on the host. At this time, ping the IPv6 address of the tunnel interface of
the switch. If the address is successfully pinged, an ISATAP tunnel is established.
Configuration verification
After the above configurations, the ISATAP host can access the host in the IPV6
network.
Displaying and
Maintaining Tunneling
Configuration
Troubleshooting
Tunneling
Configuration
Symptom: After the configuration of related parameters such as tunnel source
address, tunnel destination address, and tunnel type, the tunnel interface is still
not up.
Solution: Follow the steps below:
1 The common cause is that the physical interface of the tunnel source is not up.
Use the display interface tunnel or display ipv6 interface tunnel commands
to view whether the physical interface of the tunnel source is up. If the physical
To do… Use the command… Remarks
Display information about
a specified tunnel interface
display interface tunnel [ number ] Available in any view
Display IPv6 information
related to a specified
tunnel interface
display ipv6 interface tunnel
number
Available in any view
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