HP 7000 dl Router manual Interface tunnel id

SROS Command Line Interface Reference Guide Global Configuration Mode Command Set

interface tunnel <id>

Use the interface tunnel command to create a virtual tunnel interface and enters the Tunnel Configuration command set. See Tunnel Configuration Command Set on page 778 for details. Use the no form of this command to delete a configured virtual tunnel interface.

Syntax Description

<id> Specifies the numerical tunnel interface identifying label (valid range: 1 to 1024).

Default Values

By default, there are no configured tunnel interfaces.

Command Modes

(config)# Global Configuration Mode

Functional Notes

A tunnel may become operational only under the following conditions:

1.The tunnel must have an IP address defined.

2.A valid source address or interface must be configured.

3.A valid destination address must be configured.

4.The physical interface used as the source for the tunnel must be operational.

5.The tunnel can not be in a recursive routing loop.

6.If keepalives are enabled, keepalive processing must be successful. See keepalive <period> <retries> on page 803 for details.

Technology Review

Atunnel interface enables standard point-to-point encapsulation between two links. Each endpoint must have a unique tunnel configured. Tunneling allows an arbitrary payload protocol to be encapsulated within a delivery protocol to provide point-to-point communications. The tunnel alone does not provide encryption or any other means of high security. The tunnel interface is not a physical interface, so traffic will be routed to the tunnel by the routing engine for encapsulation or decapsulation and typically forwarded out a physical interface. A common tunnel implementation is the use of a GRE tunnel to transport IP multicast traffic, such as that used by routing protocols across a link that only has IP unicast connectivity (such as IPSec).

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