# mpls rsvp authentication key

#### Syntax

{ ip | mpls } rsvp authentication [ key authkey ]

no { ip | mpls } rsvp authentication [ key [ authkey ] ]

#### Release Information

Command introduced before JunosE Release 7.1.0.

#### Description

Assigns a key to the interface for MD5 authentication between RSVP peers. Assign the key before you enable authentication on the interface. The no version deletes the MD5 key.

| Note: Keys of up to 40 characters are supported for non–Juniper Networks implementations. However, a key with more than 16 characters will cause an authenticated link between E Series and M- or T-series routers to be inoperable.

#### Options

- ip—Specifies alternative keyword for compatibility with non–E Series implementations
- mpls—Specifies JunosE MPLS implementation
- authkey—Key used to create MD5 digest for messages sent from this interface and to authenticate messages received on this interface; alphanumeric string in the range 1–40 characters

#### Mode

Interface Configuration