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Benvenuto,
Ospite
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ARGOMENTO:
OSPF, tipi di LSA 3 Anni 11 Mesi fa #2
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Ciao Antonio,
la domanda è molto generica ma per iniziare partiamo dalle definizioni che riporto qui di seguito (fino alla tipo 5), partendo dal presupposto che le varie LSA sono ciò che per l'appunto compone il database dei router OSPF. Se restano dei dubbi procediamo per raffinamenti successivi  LSA Type 1: Router LSA LSA Type 2: Network LSA LSA Type 3: Summary LSA LSA Type 4: Summary ASBR LSA LSA Type 5: Autonomous system external LSA LSA Type 1 (Router LSA) packets are sent between routers within the same area of origin and do not leave the area. An OSPF router uses LSA Type 1 packets to describe its own interfaces but also carries information about its neighbors to adjacent routers in the same area. LSA Type 2 (Network LSA) packets are generated by the Designated Router (DR) to describe all routers connected to its segment directly. LSA Type 2 packets are flooded between neighbors in the same area of origin and remain within that area. LSA Type 3 (Summary LSA) packets are generated by Area Border Routers (ABR) to summarize its directly connected area, and advertise inter-area router information to other areas the ABR is connected to, with the use of a summary prefix (e.g 192.168.0.0/22). LSA Type 3 packets are flooded to multiple areas throughout the network and help with OSPF’s scalability with the use of summary prefixes. LSA Type 4 (ASBR Summary LSA) packets are the LSAs that advertise the presence of an Autonomous System Border Router (ASBR) to other areas. LSA Type 5 (ASBR External LSA) packets are generated by the ASBR to advertise external redistributed routes into the OSPF’s AS. A typical example of an LSA Type 5 would be an external prefix e.g 192.168.10.0/24 or default route (internet) Per meglio comprendere l'utilizzo delle LSA di tipo 2 riporto i link alle seguenti risorse interne: Definizione e funzione Pseudonode Adiacenze OSPF - DR e risparmio bandwidth OSPF, router-id e priority di interfaccia (DR-BDR) Un saluto! J. IpCert Instructor
CCENT - CCNA - CCNA CyberOps - CCNP Enterprise - CCNP Collaboration - CCNP Service Provider CCS - Enterprise Core, Ent. Advanced Infrastructure, SP Core, SP Advanced Routing, SP VPN Services, Collaboration Core, Coll. Applications |
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Si prega Accedi a partecipare alla conversazione. |
OSPF, tipi di LSA 3 Anni 11 Mesi fa #4
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Contenti di saperlo
Sposto l'argomento in CCNA A presto J. IpCert Instructor
CCENT - CCNA - CCNA CyberOps - CCNP Enterprise - CCNP Collaboration - CCNP Service Provider CCS - Enterprise Core, Ent. Advanced Infrastructure, SP Core, SP Advanced Routing, SP VPN Services, Collaboration Core, Coll. Applications |
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Si prega Accedi a partecipare alla conversazione. |
Moderatori: jpalombi