28
Figure 15 Label advertisement control diagram
A label advertisement policy on an LSR and a label acceptance policy on its upstream LSR can
achieve the same purpose. If downstream LSRs support label advertisement control, use label
advertisement policies as a best practice to reduce network load.
Before you configure an LDP label advertisement policy, create an IP prefix list. For information
about IP prefix list configuration, see
Layer 3—IP Routing Configuration Guide
.
To configure a label advertisement policy:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter LDP view or enter
LDP-VPN instance
view.
•
Enter LDP view:
mpls ldp
•
Enter LDP-VPN instance view:
a. mpls ldp
b. vpn-instance
vpn-instance-name
N/A
3.
Configure a label
advertisement policy.
advertise-label prefix-list
prefix-list-name
[
peer
peer-prefix-list-name
]
By default, LDP advertises all
label mappings permitted by the
LSP generation policy to all
peers.
Configuring a label acceptance policy
A label acceptance policy uses an IP prefix list to control the label mappings received from a peer.
As shown in
, LSR A uses an IP prefix list to filter label mappings from LSR B, and it does
not filter label mappings from LSR C.
LSR C
LSR A
LSR B
Advertise label
mappings permitted
by IP prefix list C
Advertise label
mappings permitted
by IP prefix list B
Содержание FlexNetwork 5510 HI Series
Страница 9: ...vii Remote support 460 Documentation feedback 460 Index 462 ...
Страница 318: ...309 Request list 0 Retransmit list 0 ...
Страница 363: ...354 Verify that CE 1 and CE 2 can ping each other Details not shown ...
Страница 446: ...437 The MCE has redistributed the OSPF routes of the two VPN instances into the EBGP routing tables of PE 1 ...