Cheatsheet: Difference between revisions

Content added Content deleted

Inline

@@ Line 377: / Line 377: @@
 = OSPF =
-<div style="column-count:4;-moz-column-count:4;-webkit-column-count:4">
-*;States
+* States
  Down
  Attempt
@@ Line 388: / Line 388: @@
  Full      LSDB of ngbr are fully syncd
-*;LSA Type
+* LSA Type
+ Type 1 - Router LSAs          Sent from router to other routers in the same area, has info reg router's int in the same area, int IPs, adjacent routers
- Type 1 - Router LSAs
- Type 2 - Network LSAs
+ Type 2 - Network LSAs         Generated by the DR on a multi access segment, similar to LSA Type 1
- Type 3 - Network Summary LSA
+ Type 3 - Network Summary LSA  Generated by ABRs, contain the subnets & costs
+ Type 4 - ASBR summary LSA     Same as summary LSA except the destination advertised by ABR is ASBR, ABR in same area as the ASBR will originate the Type 4 LSA.
- Type 4 - ASBR summary LSA
- Type 5 - AS external LSA
+ Type 5 - AS external LSA      Generated by ASBRs, Flooded throughout the AS to advertise a route external to OSPF
- Type 7 - NSSA External LSA
+ Type 7 - NSSA External LSA    Generated by the ASBR in an NSSA area, Converted into a type 5 LSA by the ABR when leaving the area
+* Packet Types
-*;Packet Types
  Type 1 - Hello
  Type 2 - Database Description (DBD)
  Type 3 - Link-State request (LSR)
- Type 4 - LSU
+ Type 4 - LSU (Contain LSAs)
  Type 5 - LSAck
+* Neighbor Requirements:
-*;Neighbor Requirements:
  Same area
  Same authentication config
@@ Line 412: / Line 409: @@
  Same hello/dead interval
  Matching stub flags
+* LSA Details
-</div>
 [[File:OSFF LSA 2.png|center]]