3Com 7700 Configuration Manual page 117

Setting Default Route Generation
In the IS-IS route domain, the Level-1 router only has the LSDB of the local area, so
it can only generate the routes in the local areas. But the Level-2 router has the
backbone LSDB in the IS-IS route domains and generates the backbone network
routes only. If a Level-1 router in one area wants to forward the packets to other
areas, it needs to first forward the packets to the closest Level-1-2 router in the
local area along its default route.
Perform the following configurations in IS-IS view..
Table 65 Setting Default Route Generation
Operation
Set to generate default route
Set not to generate default route
The default route generated by this command will only be imported to the router
at the same level.
Setting an IS-IS Authentication Password
Users can configure the IS-IS area or the IS-IS routing domain with authentication
password.
If area authentication is needed, the area authentication password will be
encapsulated into the level-1 LSP, CSNP and PSNP packets, in the specified mode.
If other routers in the same area also have started the area authentication, the
authentication modes and passwords of them must be identical to the old ones,
so that they can work normally. Similarly, for domain authentication, the password
will also be encapsulated into the level-2 LSP, CSNP and PSNP packets in the
specified mode. If the routers in the backbone layer (level-2) also need domain
authentication, the authentication mode and password must be identical to the
old ones.
Please note, the passwords for authentication of the routers on the same network
segment must be identical.
Perform the following configurations in IS-IS view..
Table 66 Set IS-IS Authentication Password
Operation
Set authentication-mode password
Delete authentication-mode password
Set routing domain authentication password
Delete routing domain authentication
password
By default, the system does not require password or perform authentication.
Command
default-route-advertise [ route-policy
route-policy-name ]
undo default-route-advertise [
route-policy route-policy-name ]
Command
area-authentication-mode { simple | md5 }
password [ ip | osi ]
undo area-authentication-mode { simple |
md5 } [ ip | osi ]
domain-authentication-mode { simple |
md5 } password [ ip | osi ]
undo domain-authentication-mode {
simple | md5 } [ ip | osi ]
IS-IS 109