Displaying And Maintaining Tunneling Configuration; Troubleshooting Tunneling Configuration - HP 4800G Series Configuration Manual

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 Router Discovery" is displayed, indicating
that the router 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.
C:\>ping 2001::5efe:1.1.1.1
Pinging 2001::5efe:1.1.1.1 with 32 bytes of data:
Reply from 2001::5efe:1.1.1.1: time=1ms
Reply from 2001::5efe:1.1.1.1: time=1ms
Reply from 2001::5efe:1.1.1.1: time=1ms
Reply from 2001::5efe:1.1.1.1: time=1ms
Ping statistics for 2001::5efe:1.1.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 1ms, Average = 1ms
Configuration verification
After the above configurations, the ISATAP host can access the host in the IPV6 network.

Displaying and Maintaining Tunneling Configuration

To do...
Display information about a
specified tunnel interface
Display IPv6 information
related to a specified tunnel
interface

Troubleshooting Tunneling Configuration

Symptom: After the configuration of related parameters such as tunnel source address, tunnel
destination address, and tunnel mode, 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 interface is down, use the debugging tunnel
event command in user view to view the cause.
2) Another possible cause is that the tunnel destination is unreachable. Use the display ipv6
routing-table or display ip routing-table command to view whether the tunnel destination is
reachable. If no routing entry is available for tunnel communication in the routing table, configure
related routes.
Use the command...
display interface tunnel
[ number ]
display ipv6 interface tunnel
[ number ] [ verbose ]
1-18
Remarks
Available in any view
Available in any view