Blogs about: Ospf Vs Is Is
IS-IS and OSPF - What the heck?
Manav wrote 1 year ago: The increasing popularity of IS-IS and OSPF over the years has drawn significant attention to the re … more »
Shortest Path First (SPF) Calculation in OSPF and IS-IS
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Manav wrote 4 months ago: Both OSPF and IS-IS use the Shortest Path First (SPF) algorithm to calculate the best path to all kn … more »
Graceful Restart Mechanisms in OSPF and IS-IS ..
Manav wrote 1 year ago: If the control and forwarding functions in a router can be separated independently, it is possible … more »
Metrics Size in OSPF and IS-IS ..
Manav wrote 1 year ago: Each interface in the link state protocols in given a metric or a cost, which is advertised with the … more »
Security and Authentication Issues in OSPF and IS-IS ..
Manav wrote 1 year ago: Both protocols have a field indicating the “type” of authentication. There are however … more »
Virtual Links and Partitioned Areas ..
Manav wrote 1 year ago: IS-IS - IS-IS allows a Level-1 Area which is partitioned to be automatically repaired, by electing … more »
Database Exchange and Flooding in OSPF and IS-IS ..
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Manav wrote 1 year ago: Initial Database Exchange For the SPF algorithm to work properly, all routers i … more »
Packet Alignment and Extensibility Issues in OSPF and IS-IS
Manav wrote 1 year ago: IS-IS o Does not require any particular alignment of the PDU fields. o Uses Type-Length-Value (TLV) … more »
MTU Limitations ..
Manav wrote 1 year ago: The MTU of a sub-network is the largest size packet or frame, specified in octets that can be sent … more »
Area ID Change Functionality ..
Manav wrote 1 year ago: Changing area-id for an area is useful for link state routing protocols in order to merge two areas … more »
Convergence and Scalability Issues in OSPF and IS-IS
Manav wrote 1 year ago: This seems to be the favorite question that every newbie has! There is no unequivocal answer to this … more »
Database Granularity in OSPF vs IS-IS ..
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Manav wrote 1 year ago: This post compares how the two link state protocols hold their routing information in their database … more »
Flushing LSAs (and LSPs) in OSPF and IS-IS ..
Manav wrote 1 year ago: An LSA/LSP is flushed (purged) when the contents carried by the LSA/LSP are no longer valid. In OSPF … more »
Checks on HELLOs for OSPF and IS-IS during Adjacency Formation ..
Manav wrote 1 year ago: The HELLOs (or IIHs in IS-IS parlance) are responsible bringing up the adjacencies between the two … more »
Areas and Hierarchy in OSPF and IS-IS ..
Manav wrote 1 year ago: This is required primarily for scalability issues wherein instabilities inside one small section of … more »
Designated Router (or DIS) concepts ..
Manav wrote 1 year ago: The DR concept is used by both IS-IS and OSPF on the broadcast media to limit the amount of link sta … more »
Differences in IS-IS and OSPF encapsulation ..
Manav wrote 1 year ago: IS-IS is cool and runs directly over the data link alongside IP. On Ethernet, IS-IS packets are alwa … more »
IS-IS and OSPF Interface Types Supported ..
Manav wrote 1 year ago: OSPF models networks as - Broadcast links - Point to Point (P2P) - Point to Multi-Point (P2MP) - Non … more »
Genesis ..
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Manav wrote 1 year ago: Both Integrated IS-IS and OSPF were specified in the latter part of the 1980s In 1987 OSI adopted DE … more »
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