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