Mpls Ldp Advertise-Labels - Zte ZXR10 8900 Series Command Reference Manual

Purpose
Command Modes
Syntax
Syntax
Description
Defaults
Instructions

mpls ldp advertise-labels

Use this command to control the distribution of locally assigned la-
bels (incoming labels) through LDP. This command controls which
destination network segment labels are advertised to which neigh-
bors. To disable this feature, use the no form of this command.
Global configuration
mpls ldp advertise-labels [for <prefix-access-list>[to <peer-a
ccess-list>]]
no mpls ldp advertise-labels [for <prefix-access-list>[to <pee
r-access-list>]]
for <prefix-access-li
st>
to <peer-access-list>
All labels are advertised to all neighbors by default.
The no mpls ldp advertise-labels command without any op-
tional parameter forbids the distribution of any locally assigned
labels. To restore the distribution of all locally assigned labels, use
the mpls ldp advertise-labels command without any optional
parameter. Only standard ACL is supported now.
Up to 99 mpls ldp advertise-labels commands can be executed,
those commands work together to determine how LSR advertises
local labels. In the case that multiple commands are configured,
the following rules should be followed:
1. Each mpls ldp advertise-labels command has a (prefix acl,
peer acl) pair. The access list pair is (none, none) when no op-
tional parameter is specified; and it is (prefix-acl, none) when
the optional parameter is specified but without the keyword
no.
2. There is only one (prefix acl, peer acl) pair "applied to" each
prefix in accordance with the following rules:
i. One (prefix acl, peer acl) pair "applies to" one prefix only
when prefix acl "matches" the prefix, and the match con-
dition is that prefix acl permits the prefix.
ii. In the case that there is more than one (prefix acl, peer
acl) pair "matching" a prefix; the first (prefix acl, peer acl)
pair "applies to" the prefix (in the sequence configured in
show running-config).
3. When LSR is to advertise a prefix label, it executes the following
operations:
i. Finds the (prefix acl, peer acl) pair "applied to" the prefix.
ii. In the case that there is no (prefix acl, peer acl) pair
"applied to" the prefix, the label is not advertised to any
neighbor if the no mpls ldp advertise-labels command
is executed; otherwise, the label is advertised to all neigh-
bors.
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Chapter 2 MPLS LDP Configuration
Destination network label to be advertised,
basic ACL: 1~99 and 1000~1499
Advertises which labels to which neighbors,
basic ACL: 1~99 and 1000~1499
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