ISIS routing protocol

CLNP : Nspa Address Network Service Access point

Level Two routing: Level1 , Level2

Level 1 on-Premises delivery

Level 2 Transfer between regions

default l1/l2 can be modified by configuration to L1 , L2

ISIS the backbone chain is routed continuously L2 as well l1/l2 routers are interconnected,

IDP : Initial domain part

Authority format ID : Organization of the identifiers $

IDI : 0005 0006

45.0005 45.0006

the Private

DSP : Domain Specific part

HODSP : A specified portion of a high-level field that describes the area to which the device belongs. 0001 0002

System ID : System ID used to identify an area within a device itself. 6 byte

0000.0000.0001

Nsel : NSAP Select a bit: protocol 1byte. XX

interface Enable ISIS

att  bit:

1 , when a router is Level1-level2 router, the router can send ATT Position of LSP

2when the router receives itsLevel-2Neighbor AnnouncementsLevel-2 LSPwill be sent only when theATTPosition ofLevel-1 LSP, onlyLevel-1the router receivesATTPosition ofLevel-1 LSP, it refers to the router's default route

This article is from the "Computer Network Technology" blog, please be sure to keep this source http://370220760.blog.51cto.com/6469179/1714369

ISIS routing protocol