OSPF (Open Shortest Path First) is a link-state routing protocol that dynamically calculates the shortest path between routers using Dijkstra’s algorithm. It operates within an autonomous system (AS) and supports hierarchical network design through the use of areas, reducing routing overhead and improving scalability. OSPF exchanges link-state advertisements (LSAs) to maintain a synchronized and loop-free topology. It supports equal-cost multipath (ECMP), fast convergence, and features like authentication, route summarization, and stub areas for optimized performance. OSPF runs directly over IP (protocol number 89) and is widely used in enterprise and service provider networks for its efficiency and flexibility.
You will practice these in this lab:
- Configure single area and multi area OSPF implementation
- Configure area types (Normal, Stub, Totally stubby, NSSA, Totally NSSA)
- LSA types
- Redistribution and metric types
- Authentication (Area-wide and interface level)
- OSPFv3 and address-families
- Tunnels and virtual-links
People also tried these labs:
The default username and password for images used in this
course is as follows, however you will hear new passwords during the course if
the instructor changes the credentials:
|
Image name
|
Username
|
Password
|
|
IOL images
|
No username
|
No password
|
|
CSR1000v
|
Admin
|
Admin
|
|
C8000v
|
Admin
|
admin
|
|
Viptela devices
|
Admin
|
admin
|
|
Windows Server
|
Administrator
|
Test123
|
|
IOS-XR
|
Admin
|
Enter new password
|
|
Cisco ASA 802
|
no username
|
no passwd, hit enter
|
|
Cisco ASA 8.4.2,
9.1.5
|
no username
|
no passwd, hit enter
|
|
Cisco ASAv
|
no username
|
no passwd, hit enter
|
|
Cisco IPS
|
cisco
|
ciscoips123
|
|
Cisco WSA
|
admin
|
ironport
|
|
Cisco ESA
|
admin
|
ironport
|
|
Cisco WAAS
|
admin
|
default
|
|
Cisco XR9K
|
Cisco
|
Cisco
|
|
Cisco NX9K
|
admin
|
admin
|
