Dell PowerConnect 5424 Command Line Interface Manual page 439

Example
The following example displays information on the ISATAP tunnel.
Console> show ipv6 tunnel
Router DNS name: ISATAP
Router IPv4 address: 172.16.1.1
DNS Query interval: 10 seconds
Min DNS Query interval: 0 seconds
Router Solicitation interval: 10 seconds
Min Router Solicitation interval: 0 seconds
Robustness: 3
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Tunnel