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This chapter contains the following sections:
To enter into the Interface Configuration (Tunnel) mode, use the interface tunnel command in Global Configuration mode.
interface tunnel number
number—Specifies the tunnel number.
Global Configuration mode
The following example enters the Interface Configuration (Tunnel) mode.
switchxxxxxx(config)# interface tunnel 1
switchxxxxxx(config-if)# tunnel source auto
switchxxxxxx(config-if)# exit
To set the time interval between unsolicited router solicitation messages, use the tunnel isatap solicitation-interval command in Global Configuration mode. To restore the default configuration, use the no form of this command.
tunnel isatap solicitation-interval seconds
no tunnel isatap solicitation-interval
seconds—Specifies the time interval in seconds between ISATAP router solicitation messages. (Range: 10–3600).
The default time interval between ISATAP router solicitation messages is 10 seconds.
Global Configuration mode
This command determines the interval between unsolicited router solicitation messages sent to discovery an ISATAP router.
The following example sets the time interval between ISATAP router solicitation messages to 30 seconds.
switchxxxxxx(config)# tunnel isatap solicitation-interval 30
To configure the number of router solicitation refresh messages that the device sends, use the tunnel isatap robustness command in Global Configuration mode. To restore the default configuration, use the no form of this command.
tunnel isatap robustness number
no tunnel isatap robustness
number—Specifies the number router solicitation refresh messages that the device sends. (Range: 1–20).
The default number of router solicitation refresh messages that the device sends is 3.
Global Configuration mode
The router solicitation interval (when there is an active ISATAP router) is the minimum-router-lifetime that is received from the ISATAP router, divided by (Robustness + 1).
The following example sets the number of router solicitation refresh messages that the device sends to 5.
switchxxxxxx(config)# tunnel isatap robustness 5
To display information on IPv6 tunnels, use the show ipv6 tunnel command in User EXEC mode.
show ipv6 tunnel [all]
all—(Optional) The switch displays all parameters of the tunnel. If the keyword is not configured only the tunnel parameters corresponding to its type are displayed.
User EXEC mode
Example 1. The following example displays information on the ISATAP tunnel, when the all keyword is not configured:
switchxxxxxx# show ipv6 tunnel
Tunnel 1
Tunnel type : Manual
Tunnel status : UP
Tunnel Local address type : VLAN 100
Tunnel Local Ipv4 address : 192.1.3.4
Tunnel Remote Ipv4 address : 192.3.4.5
Tunnel 2
Tunnel type : ISATAP
Tunnel status : UP
Tunnel Local address type : auto
Tunnel Local Ipv4 address : 192.1.3.4
Router DNS name : ISATAP
Router IPv4 addresses
1.1.1.1 Detected
100.1.1.1 Detected
14.1.100.1 Not Detected
Router Solicitation interval : 10 seconds
Robustness : 2Tunnel 3
Tunnel type : 6to4
Tunnel status : UP
Tunnel Local address type : auto
Tunnel Local Ipv4 address : 192.1.3.4
Example 2. The following example displays information when the all keyword is configured:
switchxxxxxx# show ipv6 tunnel all
Tunnel 1
Tunnel type : Manual
Tunnel status : UP
Tunnel Local address type : VLAN 100
Tunnel Local Ipv4 address : 192.1.3.4
Manual parameters
Tunnel Remote Ipv4 address : 192.3.4.5
ISATAP Parameters
Router DNS name : ISATAP
Router Solicitation interval : 10 seconds
Robustness : 2Tunnel 2
Tunnel type : Manual
Tunnel status : DOWN
Tunnel Local address type : auto
Manual parameters
Tunnel Remote Ipv4 address : 0.0.0.0
ISATAP Parameters
Tunnel Local Ipv4 address : 0.0.0.0
Router DNS name : ISATAP
Router Solicitation interval : 10 seconds
Robustness : 2Tunnel 3
Tunnel type : ISATAP
Tunnel status : UP
Tunnel Local address type : auto
Manual parameters
Tunnel Remote Ipv4 address : 0.0.0.0
ISATAP Parameters
Tunnel Local Ipv4 address : 192.1.3.4
Router DNS name : ISATAP
Router IPv4 addresses
1.1.1.1 Detected
100.1.1.1 Detected
14.1.100.1 Not Detected
Router Solicitation interval : 10 seconds
Robustness : 2
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