Advertising A Default Route; Configuring Is-Is Route Redistribution; Configuring Is-Is Route Filtering - HP FlexFabric 12900E Series Configuration Manual

Advertising a default route

IS-IS cannot redistribute a default route to its neighbors. This task enables IS-IS to advertise a
default route of 0.0.0.0/0 in an LSP to the same-level neighbors. Upon receiving the default route, the
neighbors add it into their routing table.
To advertise a default route:
Step
1. Enter system view.
2. Enter
unicast address family
view.
3. Advertise a Level-1 or
Level-2 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 IPv4 unicast
address family view.
3. Redistribute routes from
other routing protocols
or
processes.
4. (Optional.)
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.
Command
system-view
a isis [ process-id ] [ vpn-instance
vpn-instance-name ]
IS-IS IPv4
b cost-style
wide-compatible }
c address-family ipv4 [ unicast ]
default-route-advertise [ [ level-1 |
level-1-2 | level-2 ] | route-policy
route-policy-name ] *
Command
system-view
a isis [ process-id ] [ vpn-instance
vpn-instance-name ]
b cost-style
wide-compatible }
c address-family ipv4 [ unicast ]
import-route protocol [ as-number ]
[ process-id
allow-ibgp ] [ allow-direct | cost
cost-value | cost-type { external |
other IS-IS
internal } | [ level-1 | level-1-2 |
level-2
route-policy-name | tag tag ] *
Configure
import-route limit number
{ wide
{ wide
| all-processes
] | route-policy
145
Remarks
N/A
|
N/A
By default, IS-IS does not
advertise a Level-1 or Level-2
default route.
Remarks
N/A
|
N/A
By default, no
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
routing-table protocol command.
By default, the maximum number
of redistributed Level 1/Level 2
IPv4 routes is not configured.
route is
display ip