Cisco Cisco IOS Software Release 12.2(25)S
MPLS LDP Inbound Label Binding Filtering
Information about MPLS LDP Inbound Label Binding Filtering
2
Multiple Releases (See Feature History Table)
Information about MPLS LDP Inbound Label Binding Filtering
The MPLS LDP Inbound Label Binding Filtering feature may be used to control the amount of memory
used to store LDP label bindings advertised by other routers. For example, in a simple MPLS Virtual
Private Network (VPN) environment, the VPN provider edge (PE) routers may require LSPs only to their
peer PE routers (that is, they do not need LSPs to core routers). Inbound label binding filtering enables
a PE router to accept labels only from other PE routers.
used to store LDP label bindings advertised by other routers. For example, in a simple MPLS Virtual
Private Network (VPN) environment, the VPN provider edge (PE) routers may require LSPs only to their
peer PE routers (that is, they do not need LSPs to core routers). Inbound label binding filtering enables
a PE router to accept labels only from other PE routers.
How to Configure MPLS LDP Inbound Label Binding Filtering
This section includes the following tasks:
•
•
(Optional)
Configuring MPLS LDP Inbound Label Binding Filtering
Perform this task to configure a router for inbound label filtering. The following configuration allows
the router to accept only the label for prefix 25.0.0.2 from LDP neighbor router 10.12.12.12.
the router to accept only the label for prefix 25.0.0.2 from LDP neighbor router 10.12.12.12.
Restrictions
Inbound label binding filtering does not support extended ACLs; it only supports standard ACLs.
SUMMARY STEPS
1.
enable
2.
configure terminal
3.
ip access-list standard access-list-number
4.
permit {source [source-wildcard] | any} [log]
5.
exit
6.
mpls ldp neighbor [vrf vpn-name] nbr-address labels accept acl
7.
end