Configuring Is-Is Route Redistribution; Configuring Is-Is Route Filtering - HP 5500 EI series Configuration Manual

To advertise a default route:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Advertise a default
route.

Configuring IS-IS route redistribution

Perform this task to redistribute routes from other routing protocols into IS-IS. You can specify a cost for
redistributed routes and specify the maximum number of redistributed routes.
To configure IS-IS route redistribution from other routing protocols:
Step
1. Enter system view.
2. Enter IS-IS view.
3. Redistribute routes from
other routing protocols
or other IS-IS processes.
4. (Optional.) Configure
the maximum number of
redistributed Level
1/Level 2 IPv4 routes.

Configuring IS-IS route filtering

You can use an ACL, IP prefix list, or routing policy to filter routes calculated using received LSPs and
routes redistributed from other routing protocols.
Filtering routes calculated from received LSPs
IS-IS saves LSPs received from neighbors in the LSDB, uses the SPF algorithm to calculate the shortest path
tree with itself as the root, and installs the routes to the IS-IS routing table. IS-IS installs the optimal routes
to the IP routing table.
Perform this task to filter calculated routes. Only routes that are not filtered can be added to the IP routing
table. The filtered routes retain in the IS-IS routing table and can be advertised to neighbors.
To filter routes calculated using received LSPs:
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
default-route-advertise [ [ level-1 | level-1-2
| level-2 ] | route-policy route-policy-name ]
*
Command
system-view
isis [ process-id ] [ vpn-instance
vpn-instance-name ]
import-route protocol [ process-id |
all-processes | allow-ibgp ] [ cost cost
| cost-type { external | internal } |
[ level-1 | level-1-2 | level-2 ] |
route-policy route-policy-name | tag
tag ] *
import-route limit number
135
Remarks
N/A
N/A
By default, IS-IS does not advertise
a default route.
Remarks
N/A
N/A
By default, no route is redistributed.
By default, if no level is specified, this
command redistributes routes into the
Level-2 routing table.
This command redistributes only
active routes. To display active
routes, use the display ip
routing-table protocol command.
The default for this command varies
by device model.