JN0-649 Exam Dumps - Enterprise Routing and Switching Professional (JNCIP-ENT)

LLDP-MED (Link Layer Discovery Protocol-Media Endpoint Discovery) is an extension of LLDP (Link Layer Discovery Protocol) that provides additional functionalities specifically for voice over IP (VoIP) devices, including automatic negotiation of power requirements. This protocol is essential for automatically negotiating power with IP phones when they are connected to EX Series switches.

Steps:

Enable LLDP-MED:

set protocols lldp-med

Configure LLDP-MED on the interfaces:

set interfaces ge-0/0/0 unit 0 family ethernet-switching port-mode access

set interfaces ge-0/0/0 unit 0 family ethernet-switching interface-mode access

set interfaces ge-0/0/0 unit 0 family ethernet-switching vlan members default

set interfaces ge-0/0/0 unit 0 family ethernet-switching storm-control default

Commit the configuration:

References:

Useful Juniper Commands.txt

Tech Ops Managed Router Juniper Install Guide

ï‚· Technology Overview:

Q-in-Q (802.1ad), also known as VLAN stacking, allows multiple VLAN tags to be inserted into a single frame. This enables the carrying of multiple VLANs across a single backbone, preserving the original VLAN tags across different network segments.

ï‚· Application in Scenario:

By using Q-in-Q, the existing VLANs of the acquired company can be encapsulated within a single VLAN tag. This technique is highly efficient for carrying VLANs across a corporate backbone without altering the existing addressing scheme and with minimal configuration changes.

ï‚· Configuration Example:

Juniper Configuration:

shell

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set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan-id 100

set interfaces ge-0/0/1 unit 0 family ethernet-switching vlan-id-list 100-200

set interfaces ge-0/0/2 unit 0 family ethernet-switching vlan-id 300

set interfaces ge-0/0/2 unit 0 family ethernet-switching vlan-id-list 300-400

This setup ensures that VLANs 100-200 on interface ge-0/0/1 and VLANs 300-400 on interface ge-0/0/2 are bundled together, achieving the desired encapsulation.

ï‚· References:

Detailed configuration and benefits are documented in the "network-mgmt.pdf" file, which outlines the necessary steps and considerations for deploying Q-in-Q​​.

ï‚· Captive Portal Functionality:

Captive portals are used to enforce user authentication by redirecting web browser requests to a login page until authentication is successful.

ï‚· Operation:

When a user connects to the network, their HTTP requests are intercepted and redirected to the captive portal login page. This process continues until the user provides valid credentials.

ï‚· Implementation:

Juniper Configuration:

shell

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set security authentication-web redirect-url "http:// "

set security zones security-zone interfaces host-inbound-traffic system-services http

set security zones security-zone interfaces host-inbound-traffic system-services https

set access profile captive-portal

This configuration ensures that all HTTP/HTTPS traffic is redirected to the specified captive portal for authentication.

ï‚· References:

Detailed configuration and operation are documented in "Tech Ops Managed Router Juniper Install Guide" and related documents​​​​.