3Com MSR 50 Series, Руководство по настройке

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898 C
HAPTER
57: IS-IS C
ONFIGURATION
Configuring IS-IS Route
Leaking
With this feature enabled, the Level-1-2 router can advertise both Level-1 and
Level-2 area routing information to the Level-1 router.
Follow these steps to configure IS-IS route leaking:
n
■
If a filter policy is specified, only routes passing it can be advertised into Level-1
area.
■
You can specify a routing policy in the import-route isis level-2 into level-1
command to filter routes from Level-2 to Level-1. Other routing policies
specified for route reception and redistribution does not affect the route
leaking.
Tuning and
Optimizing IS-IS
Network
Configuration
Prerequisites
Before the configuration, accomplish the following tasks first:
■
Configure an IP address on each interface, and make sure all nodes are
reachable.
■
Configure basic IS-IS functions
Configuring a DIS
Priority for an Interface
On an IS-IS broadcast network, a router should be selected as the DIS at a specific
level, Level-1 or Level-2. You can specify a DIS priority at a level for an interface.
The bigger the interface’s priority value, the more likelihood it becomes the DIS.
Redistribute routes from
another routing protocol import-route { isis [ process-id ] |
ospf [ process-id ] | rip
[ process-id ] | bgp [ allow-ibgp ] |
direct | static } [ cost cost |
cost-type { external | internal } |
[ level-1 | level-1-2 | level-2 ] |
route-policy route-policy-name |
tag tag ] *
Required
No route is redistributed
by default.
If no level is specified,
routes are redistributed
into the Level-2 routing
table by default.
Configure a filtering policy to
filter redistributed routes filter-policy { acl-number |
ip-prefix ip-prefix-name |
route-policy route-policy-name }
export [ isis process-id | ospf
process-id | rip process-id | bgp |
direct | static ]
Optional
Not configured by
default
To do... Use the command... Remarks
To do... Use the command... Remarks
Enter system view system-view --
Enter IS-IS view isis [ process-id ] [ vpn-instance
vpn-instance-name ]
--
Enable IS-IS route
leaking import-route isis level-2 into
level-1
[ filter-policy { acl-number |
ip-prefix ip-prefix-name |
route-policy route-policy-name } |
tag tag ] *
Required
Disabled by default