212
configure a routing policy to filter routes. Routes surviving the filtering are assigned labels, and all
others are advertised as common IPv4 routes.
To configure a routing policy, use the following commands:
•
if-match
mpls-label
—Matches routes carrying MPLS labels.
•
apply
mpls-label
—Sets MPLS labels for IPv4 routes advertised to a peer. You can use this
command together with
if-match
clauses. For example, the
apply mpls-label
command works
together with the
if-match mpls-label
command to set new MPLS labels for routes with MPLS
labels. The newly assigned labels are advertised along with the routes.
For more information about routing policy configuration, see
Layer 3—IP Routing Configuration
Guide
.
To configure an ASBR for inter-AS option C:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
(Optional.) Create a routing
policy, and enter routing
policy view.
route-policy
route-policy-name
{
deny
|
permit
}
node
node-number
By default, no routing policies
exist.
3.
(Optional.) Match IPv4
routes carrying labels.
if-match mpls-label
By default, no MPLS label match
criterion is configured.
4.
(Optional.) Set labels for
IPv4 routes.
apply mpls-label
By default, no MPLS label is set
for IPv4 routes.
5.
Return to system view.
quit
N/A
6.
Enter interface view of the
interface connected to an
internal router of the AS.
interface
interface-type
interface-number
N/A
7.
Enable MPLS on the
interface.
mpls enable
By default, MPLS is disabled on
the interface.
8.
Enable MPLS LDP on the
interface.
mpls ldp enable
By default, MPLS LDP is disabled
on the interface.
9.
Return to system view.
quit
N/A
10.
Enter interface view of the
interface connected to the
remote ASBR.
interface
interface-type
interface-number
N/A
11.
Enable MPLS on the
interface.
mpls enable
By default, MPLS is disabled on
the interface.
12.
Return to system view.
quit
N/A
13.
Enter BGP instance view.
bgp
as-number
[
instance
instance-name
]
[
multi-session-thread
]
N/A
14.
Configure the PE in the same
AS as an IBGP peer.
peer
{
group-name
|
ipv4-address
[
mask-length
] }
as-number
as-number
By default, no BGP peers exist.
15.
Configure the ASBR in
another AS as an EBGP
peer.
peer
{
group-name
|
ipv4-address
[
mask-length
] }
as-number
as-number
By default, no BGP peers exist.
16.
Create the BGP IPv4 unicast
address family and enter its
view.
address-family ipv4
[
unicast
]
By default, the BGP IPv4 unicast
address family is not created.
17.
Enable exchange of IPv4
unicast routes with the PE in
peer
{
group-name
|
ipv4-address
By default, BGP does not
