JN0-649 Exam Information and Guideline
Enterprise Routing and Switching Professional (JNCIP-ENT)
Below are complete topics detail with latest syllabus and course outline, that will help you good knowledge about exam objectives and topics that you have to prepare. These contents are covered in questions and answers pool of exam.
Exam Code: JN0-649
Certification: JNCIP-ENT (Juniper Networks Certified Professional Enterprise Routing and Switching)
Format: 65 multiple-choice questions
Duration: 120 minutes
Passing Score: Approximately 65–70% (subject to change)
Delivery: Pearson VUE testing centers or online proctored
Validity: Certification is valid for three years
- Interior Gateway Protocols (IGPs)
- OSPF (Open Shortest Path First):
- Link-state database (LSDB) and flooding mechanisms
- OSPF packet types: Hello, Database Description (DBD), Link-State Request (LSR), Link-State Update (LSU), Link-State Acknowledgment (LSAck)
- LSA types (e.g., Router, Network, Summary, External, NSSA External)
- Area types: Backbone (Area 0), Stub, Totally Stubby, Not-So-Stubby Area (NSSA)
- OSPF authentication (plain text, MD5)
- Virtual links and route summarization
- OSPF troubleshooting (e.g., neighbor adjacency issues, route filtering)
- IS-IS (Intermediate System to Intermediate System):
- IS-IS levels (Level 1, Level 2, Level 1-2)
- TLVs (Type-Length-Value) and PDU types (Hello, LSP, CSNP, PSNP)
- Designated Intermediate System (DIS) election
- Wide metrics vs. narrow metrics
- IS-IS authentication and route leaking
- Troubleshooting IS-IS adjacency and routing issues
- LSDB, LSA, SPF (Shortest Path First), DR/BDR (Designated Router/Backup Designated Router), ABR (Area Border Router), ASBR (Autonomous System Boundary Router), NET (Network Entity Title), CLNS (Connectionless Network Service), route redistribution.
- Border Gateway Protocol (BGP)
- Description: Configuring and troubleshooting BGP in enterprise environments, focusing on both internal (iBGP) and external (eBGP) peering.
- BGP attributes: AS Path, Next Hop, Local Preference, MED (Multi-Exit Discriminator), Origin, Community
- BGP message types: Open, Update, Notification, Keepalive
- iBGP vs. eBGP peering rules and route reflection
- Confederations and route reflectors for scalability
- BGP path selection process
- Route filtering using prefix lists, route maps, and communities
- BGP multipath and load balancing
- Troubleshooting BGP (e.g., peering issues, missing routes, attribute manipulation)
- Autonomous System (AS), BGP neighbor states (Idle, Connect, Active, OpenSent, OpenConfirm, Established), route reflector, confederation, flap damping, BGP next-hop resolution, graceful restart.
- IP Multicast
- Multicast addressing (IPv4: 224.0.0.0/4, IPv6: FF00::/8)
- IGMP (Internet Group Management Protocol) versions (v1, v2, v3)
- PIM (Protocol Independent Multicast) modes: Dense Mode, Sparse Mode, Source-Specific Multicast (SSM)
- Rendezvous Point (RP) configuration: Static, Auto-RP, Bootstrap Router (BSR)
- Any-Source Multicast (ASM) vs. Source-Specific Multicast (SSM)
- Multicast distribution trees: Shared Tree (*,G), Source Tree (S,G)
- Troubleshooting multicast (e.g., RPF (Reverse Path Forwarding) failures, group membership issues)
- Multicast group, IGMP snooping, PIM register messages, RPF check, mroute table, shortest-path tree, shared tree, DR (Designated Router) for multicast.
- Ethernet Switching and Virtual LANs (VLANs)
- Description: Configuring and troubleshooting advanced Ethernet switching features on Juniper EX and QFX series switches.
- VLAN configuration and tagging (IEEE 802.1Q)
- Access vs. trunk ports
- Private VLANs (PVLANs): Isolated, Community, Promiscuous ports
- Virtual Chassis and Virtual Chassis Fabric (VCF)
- Data Center Interconnect (DCI) using EVPN (Ethernet VPN)
- Spanning Tree Protocols: STP, RSTP, MSTP, VSTP
- Link Aggregation Groups (LAG) and MC-LAG (Multi-Chassis LAG)
- Troubleshooting switching issues (e.g., VLAN misconfiguration, loop prevention)
- VLAN ID, tagged/untagged frames, Q-in-Q tunneling, BPDU (Bridge Protocol Data Unit), root bridge, LACP (Link Aggregation Control Protocol), MAC learning, flooding, EVPN-VXLAN.
- Layer 2 Authentication and Access Control
- Description: Implementing security features for Layer 2 networks.
- 802.1X authentication (port-based network access control)
- MAC RADIUS authentication
- Captive portal for guest access
- Dynamic VLAN assignment
- Storm control and rate limiting
- DHCP snooping and ARP inspection
- Troubleshooting authentication and access control issues
- Supplicant, authenticator, authentication server, EAP (Extensible Authentication Protocol), RADIUS, port security, DAI (Dynamic ARP Inspection), IP source guard.
- Protocol-Independent Routing
- Description: Configuring and troubleshooting routing features that are independent of specific routing protocols.
- Static routes and aggregate routes
- Route preference and administrative distance
- Filter-based forwarding (FBF)
- Routing instances (virtual routers, VRFs)
- Load balancing and ECMP (Equal-Cost Multipath)
- Troubleshooting routing table issues
- Next-hop types (direct, indirect, reject, discard), qualified next-hop, routing policy, VRF (Virtual Routing and Forwarding), ECMP hashing, route resolution.
- High Availability (HA)
- Description: Implementing and troubleshooting high-availability features for enterprise networks.
- Graceful Routing Engine Switchover (GRES)
- Non-Stop Active Routing (NSR)
- Non-Stop Bridging (NSB)
- Virtual Router Redundancy Protocol (VRRP)
- Bidirectional Forwarding Detection (BFD)
- Link Aggregation Control Protocol (LACP) for redundancy
- Troubleshooting HA configurations
- Primary/backup Routing Engine, VRRP priority, preemption, BFD timers, NSR state replication, GRES synchronization, LAG redundancy.
- Network Management and Monitoring
- Description: Managing and monitoring Juniper devices in enterprise networks.
- SNMP (Simple Network Management Protocol) configuration
- Syslog and event logging
- NetFlow/sFlow for traffic monitoring
- Junos Space and Contrail Enterprise Multicloud for network management
- Packet capture and analysis (e.g., using monitor traffic)
- Troubleshooting network performance issues
- Key Terminologies:
- MIB (Management Information Base), trap, syslog severity levels, flow records, packet sampling, RPM (Real-time Performance Monitoring), SLA (Service Level Agreement).
- Advanced Security Features
- Description: Implementing security mechanisms to protect enterprise networks.
- Firewall filters (ACLs) and policers
- Security policies and zones
- Unified Threat Management (UTM): Antivirus, Web filtering, IPS
- Screen options for DoS protection
- Troubleshooting security policy issues
- Stateful firewall, stateless firewall, security zone, ALG (Application Layer Gateway), DoS (Denial of Service), IDS/IPS (Intrusion Detection/Prevention System), policer bandwidth limits.
- Software-Defined Networking (SDN) and Automation
- Description: Understanding modern networking trends, including SDN and automation, as they apply to Juniper platforms.
- SDN concepts and Juniper’s Contrail Enterprise Multicloud
- Network automation using Python, PyEZ, or Ansible
- YANG data modeling and NETCONF
- EVPN-VXLAN for data center fabrics
- Troubleshooting SDN and automation scripts
- SDN controller, overlay/underlay networks, VXLAN (Virtual Extensible LAN), BGP EVPN, API (Application Programming Interface), RPC (Remote Procedure Call), telemetry.
- Advanced Junos Enterprise Routing (AJER): Covers advanced routing protocols (OSPF, IS-IS, BGP) and policies.
- Advanced Junos Enterprise Switching (AJEX): Focuses on Ethernet switching, VLANs, and data center technologies.
- IGPs: LSDB, LSA, SPF, DR/BDR, ABR, ASBR, NET, CLNS, route redistribution.
- BGP: AS Path, Next Hop, Local Preference, MED, route reflector, confederation, flap damping.
- IP Multicast: Multicast group, IGMP, PIM, RPF, mroute, shared tree, source tree.
- Ethernet Switching: VLAN, 802.1Q, PVLAN, Virtual Chassis, EVPN, STP, LAG, MC-LAG.
- Layer 2 Security: 802.1X, MAC RADIUS, DHCP snooping, ARP inspection, storm control.
- Protocol-Independent Routing: Static route, VRF, ECMP, FBF, route preference.
- High Availability: GRES, NSR, NSB, VRRP, BFD, LACP.
- Network Management: SNMP, syslog, NetFlow, sFlow, Junos Space, packet capture.
- Security: Firewall filter, security zone, UTM, DoS screen, policer.
- SDN/Automation: SDN, VXLAN, EVPN, PyEZ, NETCONF, YANG, telemetry.