Enterprise Routing and Switching, Specialist (JNCIS-ENT)

Layer 2 Switching or VLANs

Identify the concepts, operations, or functionalities of Layer 2 switching for the Junos OS:

• Bridging components
• Frame processing

Describe the concepts, benefits, or functionalities of VLANs:

• Ports
• Tagging
• Native VLANs and voice VLANs
• Inter-VLAN routing

Demonstrate knowledge how to configure, monitor, or troubleshoot Layer 2 switching or VLANs:

• Interfaces and ports
• VLANs
• Inter-VLAN routing  

Spanning Tree

Describe the concepts, benefits, operations, or functionalities of the Spanning Tree Protocol (STP):

• STP and Rapid Spanning Tree Protocol (RSTP) concepts
• Port roles and states
• Bridge Protocol Data Units (BPDUs)
• Convergence and reconvergence

Demonstrate knowledge how to configure, monitor, or troubleshoot Spanning Tree:

• STP
• RSTP

Layer 2 Security

Identify the concepts, benefits, or operations of various Layer 2 protection or security features:

• BPDU, loop or root protection
• Port security, including MAC limiting, DHCP snooping, Dynamic ARP inspection (DAI) or IP source guard
• MACsec
• Storm control

Identify the concepts, benefits, or operations of Layer 2 firewall filters:

• Filter types
• Processing order
• Match criteria and actions

Demonstrate knowledge how to configure, monitor, or troubleshoot Layer 2 security:

• Protection
• Port security
• Storm control
• Firewall filter configuration and application

Protocol Independent Routing

Identify the concepts, operations, or functionalities of various protocol-independent routing components:

• Static, aggregate, and generated routes
• Martian addresses
• Routing instances, including routing information base (RIB) groups
• Load balancing
• Filter-based forwarding

Demonstrate knowledge how to configure, monitor, or troubleshoot various protocol-independent routing components:

• Static, aggregate, and generated routes
• Load balancing
• Filter-based forwarding

OSPF

Describe the concepts, operations, or functionalities of OSPF:

• Link-state database
• OSPF packet types
• Router ID
• Adjacencies and neighbors
• Designated router (DR) and backup designated router (BDR)
• OSPF area and router types
• Realms
• Link-state advertisement (LSA) packet types

Demonstrate knowledge how to configure, monitor, or troubleshoot OSPF:

• Areas, interfaces, and neighbors
• Additional basic options
• Routing policy application
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

IS-IS

Describe the concepts, operations, or functionalities of IS-IS:

• Link-state database
• IS-IS Protocol Data Units (PDUs)
• Type, length, and values (TLVs)
• Adjacencies and neighbors
• Levels and areas
• Designated intermediate system (DIS)
• Metrics

Demonstrate knowledge of how to configure, monitor, or troubleshoot IS-IS:

• Levels, interfaces, and adjacencies
• Additional basic options
• Routing policy application
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

BGP

Describe the concepts, operations, or functionalities of BGP:

• BGP basic operation
• BGP message types
• Attributes
• Route/path selection process
• Internal and external BGP (IBGP and EBGP) functionality and interaction

Demonstrate knowledge of how to configure, monitor, or troubleshoot BGP:

• Groups and peers
• Additional basic options
• Routing policy application
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

Tunnels

Identify the concepts, requirements, or functionalities of IP tunneling:

• Tunneling applications and considerations
• Generic Routing Encapsulation (GRE)
• IP-IP

Demonstrate knowledge of how to configure, monitor, or troubleshoot IP tunnels:

• GRE
• IP-IP
• Troubleshooting tools (ping, traceroute, traceoptions, show commands, logging)

High Availability

Identify the concepts, benefits, applications, or requirements for high availability in a Junos OS environment:

• Link aggregation groups (LAG)
• Redundant trunk groups (RTG)
• Virtual chassis
• Graceful restart
• Graceful Routing Engine switchover (GRES)
• Nonstop active routing (NSR)
• Nonstop bridging (NSB)
• Bidirectional Forwarding Detection (BFD)
• Virtual Router Redundancy Protocol (VRRP)
• Unified In-Service Software Upgrade (ISSU)

Demonstrate knowledge of how to configure, monitor, or troubleshoot high availability components:

• LAG and RTG
• Virtual chassis
• Graceful restart, GRES, NSB, and NSR
• VRRP
• ISSU
• Troubleshooting tools (traceoptions, show commands, logging)