ISIS-Routing Area Routes of Three Types of Routers

Created: Dec 24, 2018 13:57:29Latest reply: Dec 25, 2018 02:30:42 105 6 9 0

The routing characteristics of Level-1 routers are as follows:
· Only the Level-1 LSDB is available.
· The link state database contains only the local router LSP.
· There is no routing information about other areas in the routing table.
· There is a default route in the routing table, and the next hop is a Level-1-2 router.


The routing characteristics of Level-2 routers are as follows:
The · Level-2 router has only the Level-2 LSDB.
· The LSDB contains the LSP of the router in the backbone area, but no LSP is generated by the Level-1 router.
· The routing table contains the routing information of the entire network.



The routing characteristics of Level-1-2 routers are as follows:
A ·Level-1-2 router has a Level-2 LSDB and a Level-1 LSDB.
The · Level-1 database contains LSPs in the local area, and the Level-2 database contains LSPs in the backbone area.
The ATT bit is set to 1 in the Level-1 LSP generated by itself.
· The routing table contains the routing information of the entire network.

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JoneSnow  Visitor   Created Dec 24, 2018 14:09:55 Helpful(0) Helpful(0)

What's the difference between ISIS and OSPF?
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YOO  Visitor   Created Dec 24, 2018 14:12:57 Helpful(0) Helpful(0)

The routing table contains the routing information of the entire network.could you please share us more information about it?
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yiyi0519  Visitor   Created Dec 24, 2018 14:13:22 Helpful(0) Helpful(0)

In the MAN network deployment, we usually use the IS-IS, the Level 1and Level-1-2 not use more, can you give more infromation for the Level 1 and Level 1-2 network type?
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dagui  Visitor   Created Dec 24, 2018 14:14:12 Helpful(0) Helpful(0)

Can the LSDB protocol be specifically introduced, his uses and functions, etc.
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user_2915719  Visitor   Created Dec 24, 2018 18:00:22 Helpful(0) Helpful(0)

can you explain what is this Level-1 router and Level-2 router means? I'm confused.
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wissal     Created Dec 25, 2018 02:30:42 Helpful(0) Helpful(0)

Good one
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