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# tunnel source

#### Syntax

For DVMRP and GRE tunnels in Interface Configuration mode:

tunnel source { ipAddress | interfaceType interfaceSpecifier }

no tunnel source

For IPSec tunnels in Interface Configuration mode:

tunnel source { ipAddress | identity fqdn }

no tunnel source

For DVMRP and GRE tunnels in IP PIM Data MDT Configuration mode and in IP Tunnel Destination Profile Configuration mode:

[ no ] tunnel source ipAddress

#### Release Information

Command introduced before JunosE Release 7.1.0.
IP PIM Data MDT Profile Configuration mode, and IP Tunnel Destination Profile Configuration mode added in JunosE Release 8.2.0.

#### Description

In Interface Configuration mode, configures the source for a DVMRP, GRE, or IPSec tunnel. The no version deletes the tunnel source.

In IP Tunnel Destination Profile Configuration mode, configures the source in the destination profile for dynamic IP tunnels. The no version deletes the tunnel source.

In IP PIM Data MDT Configuration mode, configures the source in the IP PIM Data MT profile for multicast VPNs. The no version deletes the tunnel source.

#### Options

- ipAddress—IP address of an existing interface that will serve as the tunnel’s source
- interfaceType—Interface type; see Interface Types and Specifiers
- interfaceSpecifier—Particular interface; format varies according to interface type; see Interface Types and Specifiers
- fqdn—Fully qualified domain name of the interface to serve as the tunnel’s source; a maximum of 80 characters

#### Mode

Interface Configuration, IP PIM Data MDT Configuration, IP Tunnel Destination Profile Configuration

#### Published: 2010-10-19

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