Configure Tunnel Interface
Configuration Condition
None
Configure Basic Functions of Tunnel Interface
Table 8-2 Configure basic functions of tunnel interface
|
Step
|
Command
|
Description
|
| Enter the global configuration mode |
configure terminal |
- |
|
Create tunnel interface and enter its configuration mode
|
interface tunnel tunnel-unit
|
Mandatory
By default, the tunnel interface is not created on the device.
|
|
Configure work mode of tunnel interface
|
tunnel mode { gre [ ip | ipv6 ] | ipip | ipipv6 | ipv6ipv6 | ipv6ip [ 6to4 | isatap ] }
|
Optional
By default, the work mode of the tunnel interface is GRE over IPv4.
|
|
Configure TOS of tunnel interface
|
tunnel tos tos-value
|
Optional
By default, the tunnel interface is not configured with TOS.
|
|
Configure TTL of tunnel interface
|
tunnel ttl ttl-value
|
Optional
By default, the TTL value of the tunnel interface is 255.
|
-
The TOS configured on tunnel interface is used to fill the TOS field in the outer IPv4 packet header during encapsulation. If the TOS value is not configured on tunnel interface, use the TOS value in the inner IPv4 packet header.
- The TTL value configured on tunnel interface is used to fill the TTL field in the outer IPv4 packet header during encapsulation.
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