Administrator Guide

Tunneling Commands
Tunnel interfaces create a logical tunnel for IPv4 or IPv6 traffic. You can configure DCSP, hop-limits and flow-labels. To enable a tunnel
interface, use the following commands.
Topics:
• ip unnumbered
• ipv6 unnumbered
• tunnel allow-remote
• tunnel destination
• tunnel dscp
• tunnel flow-label
• tunnel hop-limit
• tunnel keepalive
• tunnel-mode
• tunnel source
ip unnumbered
Configure a tunnel interface to operate without a unique IPv4 address and select the interface from which the tunnel borrows its address.
C9000 Series
Syntax
ip unnumbered {interface-type interface-number}
To set the tunnel back to default logical address use the no ip unnumbered command. If the tunnel was
previously operational, the tunnel interface is operationally down unless you also configure the tunnel IPv6
address.
Parameters
interface-type
interface-number
Enter the interface type, followed by a slot number.
Defaults None
Command Modes INTERFACE TUNNEL
Command History
This guide is platform-specific. For command information about other platforms, see the relevant Dell Networking
OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.9(0.0) Introduced on the C9010.
9.7(0.0) Introduced on the S6000-ON.
9.3(0.1) Introduced on the S6000 and Z9000.
9.4(0.1) Introduced on the S4810, S4820T, S6000 and Z9000.
Usage Information
The ip unnumbered command fails in two conditions:
• If the logical ip address is configured.
• If Tunnel mode is ipv6ip (where ip address over tunnel interface is not possible).
To ping the unnumbered tunnels, the logical address route information must be present at both the ends.
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