Cisco CCNP / BSCI Tutorial: Comparing OSPF and ISIS Hellos

Bsci while studying, and pass an exam to earn certification ccnp to prepare and quick to note that while you Isis RINKUSUTETOPUROTOKORU both of OSPF, there are many differences between the two. One way is the main difference between the two is a protocol to deal with Hello packets. Isis
hello OSPF packet is imperative to maintain relations with the neighboring alive. They are both RINKUSUTETOPUROTOKORU since they both specify the time when the update will be sent. Hello packets are the only method by which routers running OSPF verify that the Isis and the neighbor is not yet available.
ospf us some great options that would maintain the routing table size down to stubs and stubs through the use of the total area, but OSPF, Hello packets are packets Hi. ISHISURUTA that can send two types of hellos - Level 1 and Level 2.
isis routers are classified as Level 1 (L1) and Level 2 (L2), and Level 1-2 (l1 - L2). By default, Cisco routers, L2 router - l1; This is the all-enabled interface AISHISU - l1 and send both L2 hellos.
if interface is one of the adjacent molding L2 only l1, or to submit reasons exist for other types of adjacent hellos. For example, r1 is adjacent to the formation of a ethernet0 interface l1 via r2 is the reason why there is no transmission possible on the router L2 hellos. Hard router interface to send only the L2 hellos or l1, Isis using circuit-type command.
r1 (set) ethernet0
r1 interface (configuration) type circuit level
note Isis 1: This is just to set the interface to send L2 hellos, and a complete command, Isis " type circuit level - 2 -- Only & quot;, rather than simply & quot; " Level 2.
this set out L2 hellos to prevent sent from ethernet0. This is stored in the router because it is unnecessary to use the bandwidth resources, there is no way you can form L2 neighbor - so double-check the command Before using the network topology. earlie jokester



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