LSA Type 1 Router LSA
One router LSA (type 1) for every router in an area - Includes list of directly attached links - Each link identified by IP prefix assigned to link and link type Identified by the router ID of the originating router Floods within its area only does not cross ABR A router advertises a type 1 LSA that floods to all other routers in the area in which it originated. A type 1 LSA describes the collective states of the directly connected links (interfaces) of the router. Each type 1 LSA is...
Module Self Check
Use the questions here to review what you learned in this module. The correct answers and solutions are found in the Module Self-Check Answer Key. Q1) Which three features are benefits of EIGRP (Choose three.) (Source Introducing EIGRP) B) support for VLSM and discontiguous subnets C) same metric algorithm as OSPF D) manual route summarization at any point in the network Q2) What is listed in the EIGRP topology table (Source Introducing EIGRP) A) directly connected routers that have formed an...
- A neighbor that receives a packet informing it of the stub status does not query the stub router for any routes
- A router that is not the DR or BDR is Drother
- ACK Acknowledge a reliable packet
- Active Process Enhancement
- Adding the Link State Entries
- Advantages of OSPF
- Are Adjacencies Established
- Automatic summarization occurs by default
- Best routes are put into the forwarding database routing table
- Broadcast Mode
- Building an IP Routing Table
- Change ISIS Interface Level
- Change ISIS Metric
- Changing the Cost Metric
- Cisco Network Models
- Comparing Broadcast and Pointto Point Topologies
- Configuring a Default Route in OSPF
- Configuring Basic Single Area and Multiarea OSPF
- Configuring Load Balancing Across Unequal Cost Paths
- Configuring Manual Route Summarization
- Configuring MD5 Authentication
- Configuring Ospf Lsdb Overload Protection
- Configuring OSPF on Internal Routers of a Single Area
- Configuring OSPF Route Summarization
- Configuring Route Summarization in ISIS
- Configuring WAN Links
- Connections
- Consequently linkstate routers tend to make more accurate decisions
- Contains list of best paths to destinations
- Convert these to pointtopoint configuration or manually configure bandwidth by multiplying the lowest CIR by the number of PVCs
- Course Flow
- Course Goal and Objectives
- Course Introduction
- Creates a virtual link
- Creation of Adjacencies for Broadcast Mode
- Creation of Adjacencies for Pointto Point Mode
- Cshow ip eigrp topology
- Default is connected and summary
- Defines the interfaces bandwidth for the purposes of sending routing update traffic
- Deigrp stub none
- Dip bandwidthpercent eigrp 200
- Displays information about the OSPF neighbors including DR and BDR information on broadcast networks
- Displays the OSPF adjacencyrelated events
- Displays the OSPF router ID area ID and adjacency information
- Dnetwork 10100 00255255
- Do not need to configure neighbors
- Dshow ip eigrp topology
- Each protocol has its own EIGRP module and operates independently of any of the others that may be running
- Edebug eigrp adj
- EIGRP Features
- Eigrp Ip Routing Table
- EIGRP Metric
- EIGRP Metric Calculation
- EIGRP Metrics Are Backward Compatible with IGRP
- EIGRP Operation
- EIGRP uses the bandwidth on the physical interface divided by the number of neighbors on that interface to calculate the bandwidth attributed per neighbor
- Eigrp Wan Configuration Hybrid Multipoint
- Enterprise Composite Network Model Functional Areas
- Establishing Bidirectional Communication
- Example Are There Any IP Routes
- Example debug ip ospf adj Output for Broadcast Mode
- Example debug Output for Pointto Point Mode
- Example Default Routes in OSPF
- Example Eigrp Configuration - 2
- Example eigrp stub Parameters
- Example Eigrp Tables
- Example Identifying SystemsOSI Addressing in Networks
- Example ip defaultnetwork Command
- Example Is Integrated ISIS Running - 2
- Example Limiting Updates and Queries Using Eigrp Stub
- Example LSA Type 4Summary LSA
- Example LSDB Synchronization Pointto Point
- Example LSDB SynchronizationLAN
- Example MD5 Authentication Configuration
- Example neighbor Command
- Example NSSA Configuration
- Example NSSA Totally Stubby Configuration
- Example OSI Area Routing
- Example OSPF Hierarchical Routing
- Example OSPF Stub Area Configuration
- Example Pointto Point Subinterface
- Example R1 Configuration for MD5 Authentication
- Example R2 Configuration for MD5 Authentication - 2
- Example R2 Configuration for Simple Password Authentication
- Example R2 Eigrp Configuration
- Example Route Summarization Configuration at ABR
- Example Route Summarization Configuration at ASBR
- Example show ip ospf neighbor Command
- Example show ip ospf virtuallinks Command
- Example Simple Integrated ISIS Configuration
- Example Successful MD5 Authentication - 2
- Example Successful Simple Password Authentication
- Example Summarizing Eigrp Routes
- Example The show ip ospf interface Command - 2
- Example The show ip ospf neighbor Command - 2
- Example Totally Stubby Configuration
- Example Troubleshooting MD5 Authentication Problems - 2
- Example Troubleshooting Simple Password Authentication Problems
- Example Tuning ISIS Configuration
- Example Using Route Summarization
- Example Variance
- Example WAN Configuration Frame Relay Huband Spoke Topology
- Example WAN Configuration Hybrid Multipoint
- Example Wildcard Mask in EIGRP
- Feasible successor backup router with loopfree path AD of feasible successor must be less than FD of current successor route
- First valid activated key in order of key numbers is used
- If a router has an alternate route it answers the query this stops the query from spreading in that branch of the network
- If the OSPF process is already running the router must be reloaded or the OSPF process must be removed and reconfigured before the new loopback address will take effect
- If this command is used on an OSPF process that is already active then the new router ID is used after the next reload or manual OSPF process restart using
- Implementing Network Types in NBMA
- Initial Route Discovery
- Integrated applications
- Integrated ISIS Design Principles
- Integrated ISIS Routing
- Integrated ISIS vs OSPF Area Design
- Integrated ISIS vs OSPF Area Design Cont
- Interpreting the OSPF Database
- Interpreting the Routing Table Types of Routes
- ISIS Features
- ISIS Level 1 Routing
- ISIS Link State Operation
- ISIS Network Representation
- Isis Pdus
- ISIS Routing
- Issues with Integrated ISIS
- Issues with Maintaining a Large OSPF Network
- Level 1 and Level 2 IIH
- Level 1 and Level 2 LSP
- Level 1 and Level 2 LSPs and IIHs
- Level 1 and Level 2 Topology Table
- Level 1 Level 2 and Level 12 Routers
- Link ID Identifies each LSA
- Link State Packets
- LSA Sequence Numbering
- LSA Sequence Numbers and Maximum
- LSA Types
- LSAs are flooded reliably throughout the area or network
- LSDB Synchronization - 2
- LSP Header
- LSP Representing Routers LAN Representation
- MD5 Authentication
- Module Self Check
- Module Self Check Answer - 2 - 2
- Module Summary - 2
- Module Summary Cont 3
- NBMA Topology
- Neighbors need to be statically configured
- Neighborship The Hello Packet
- NET Addresses
- No virtual links go through the area
- Nonbroadcast Mode NBMA Mode
- NSSA is an RFC addendum
- Objectives - 2 3 4 5 6 7 8 9
- Optimizes applications processes and resources
- Optimizing ISIS
- OSI Addresses
- OSI Area Routing Building an OSI Forwarding Database Routing Table
- Osi Isis Routing Logic
- OSI PDUs
- OSPF Adjacencies
- OSPF neighbors are not automatically discovered by the router
- OSPF Network Types
- OSPF over NBMA Topology Summary
- OSPF Packet Header Format
- OSPF Packet Types
- OSPF packets are sent using multicast 224005
- OSPF Router ID
- OSPF Router ID Verification
- Overview - 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
- Packets to the DR and the BDR use 224006 Packets from DR to all other routers use 224005
- Path 3 45 via D
- Pointto Multipoint Example
- Pointtopoint
- Process OS secure
- References
- Route Leaking
- Router A notifies all Ospf Drs on 224006 DR notifies others on 224005
- Router D is never considered to get to network Z because 25
- Router with link ID 192168167 has been updated eight times the last update was 48 seconds ago
- Routing Table in a Standard Area
- Routing Table in a Stub Area
- Routing Table in a Stub Area with Summarization
- Routing Table in a Totally Stubby Area
- Security access transmission
- Selecting the OSPF Network Type for NBMA Networks
- Set to 1 to disable load balancing
- Shows fields in OSPF header
- Similarities Between ISIS and OSPF
- Simple Integrated ISIS Example
- Simple password authentication is supported by
- Simple Troubleshooting What About CLNS Protocol
- Specifies the authentication type for an area was in Cisco IOS software before 120 - 2
- Statement
- Step 1 Define Area and Addressing
- Step 2 Enable ISIS on the Router
- Step 3 Configure the NET
- Step 4 Enable Integrated ISIS
- Student Guide
- Summary - 2
- Summary Cont - 2 3 4 3 4 5 6 7 8 9 10 11 12
- Summary of Differences between OSPF and Integrated ISIS 13 14 15 16
- The addition of nosummary on the ABR creates a totally stubby area and prevents all summary LSAs from entering the stub area
- The default cost is
- The DR election is nonpreemptive
- The ESIS Protocol
- The minimum metric of the specific routes is used as the metric of the summary route
- The nosummary keyword creates an NSSA totally stubby area this is a Cisco proprietary feature
- The show ip ospf virtuallinks Command
- The show ip route Command
- This mode is RFC 2328compliant
- Troubleshooting Commands CLNS
- Troubleshooting Commands CLNS and ISIS
- Troubleshooting MD5 Authentication - 2
- Troubleshooting MD5 Authentication Problems
- Troubleshooting Simple Password Authentication Problems
- Types 3 and
- Types of Areas
- Types of Authentication
- Types of OSPF Routers
- Typical NSAP Address Structure
- Updates and Queries in Huband Spoke Topology
- Used in special cases where neighbors cannot be automatically discovered
- Used to statically define neighbor relationships in an NBMA network
- Using Stub Areas
- Using Subinterfaces in OSPF over Frame Relay Configuration
- Using Totally Stubby Areas
- Verifying EIGRP show ip protocols
- Verifying MD5 Authentication - 2 3
- Verifying Simple Password Authentication - 2
- Virtual links are recommended for backup or temporary connections

