What occurs when authentication is configured on an EIGRP router?
- After EIGRP authentication has been configured, the router must be rebooted to be able to reestablish adjacencies.
- If adjacencies are displayed after the use of the show ipv6 eigrp neighbors command, then EIGRP authentication was successful.
- Only one router is required to be configured for EIGRP authentication.
- If only one router has been configured for EIGRP authentication, any prior adjacencies will remain intact.
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