3com 3031 Instruccion De Instalación

You can set the circuit level to limit what adjacency can be established for the 
interface. For example, Level-1 interface can only have Level-1 adjacency. Level-2 
interface can only have Level-2 adjacency. For the Level-1-2 router, you can 
configure some interfaces to Level-2 to prevent transmitting Level-1 Hello packets 
to Level-2 backbone so as to save the bandwidth. However Level-1 and Level-2 
use the same kind of Hello packet over the p2p link, and therefore such setting is 
unnecessary in this case.

By default, the circuit-level on the interface route is Level-1-2.

The authentication password set on the interface is mainly used in the Hello 
packet so as to confirm the validity and correctness of its peers. The authentication 
passwords at the same level of all the interfaces of a network should be identical.

Perform the following in the Interface View.

By default, no interface authentication is performed. The user must enable 
interface authentication and define a password. If the user omits which level to 
provide authentication, Level-1 will be used.

On NBMA networks, the router will flood received LSPs to all other interfaces. In a 
full mesh environment, this will cause wasted bandwidth and increased processing 
by each router.

This problem can be avoided by defining interfaces into a Mesh Group. When the 
router receives an LSP over an interface within a mesh group, the router will only 
flood those messages to interfaces not defined in a mesh group, and to interfaces 
defined in a different mesh group. No messages will be flooded out of an interface 
belonging to the same mesh group over which the original message was received.

Perform the following in the Interface View.

The router will flood to other mesh group members unless the mesh group 
definition is set to Blocking.

Based upon the position of the router within the network. the levels can be 
divided into Level-1 (intra-domain router), Level-2 (inter-domain router) and 
Level-1-2 (i.e. intra-domain router as well as inter-domain router).

Table 605   Setting interface authentication password

Configure authentication 
password

isis authentication-mode { simple | md5 } 
password [ { level-1 | level-2 } [ ip | osi ] ]

Delete authentication 
password

undo isis authentication-mode { simple | md5 } 
password [ { level-1 | level-2 } [ ip | osi ] ]

Table 606   Configuring the mesh group of the interface

Add the interface into a mesh group

isis mesh-group [ 
mesh-group-number | mesh-blocked ]

Remove the interface from a mesh group