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LDP filtering

Hello,

I am trying to filter LDP label bindings to only advertise my loopback

address(for vpnv4 traffic) but I am unsure as to what the requirements are.

Here is what I have:

PE1#show ip route connected | in ^C

C 1.1.1.0 is directly connected, Serial1/0

C 10.0.0.1 is directly connected, Loopback0

C 150.0.0.0 is directly connected, FastEthernet0/1

PE1#sh run | in tag

no tag-switching advertise-tags

tag-switching advertise-tags for ldp-filter

PE1#show access-lists ldp-filter

Standard IP access list ldp-filter

10 permit 10.0.0.0, wildcard bits 0.0.0.255 (6 matches)

999 deny any (7 matches)

matches?

but still generates a binding for all my connected interfaces:

PE1#show mpls ldp bindings 150.0.0.0 24

tib entry: 150.0.0.0/24, rev 2

local binding: tag: imp-null

remote binding: tsr: 25.25.25.25:0, tag: 18

PE1#

And the other side tags it with a label:

PE2#traceroute 150.0.0.1

Type escape sequence to abort.

Tracing the route to 150.0.0.1

1 1.1.1.5 [MPLS: Label 18 Exp 0] 16 msec 52 msec 24 msec

2 1.1.1.1 24 msec 52 msec *

TIA,

1 REPLY

Re: LDP filtering

Hi,

You can use

mpls ldp advertise-lable [vrf vrf-name] [interface interface | for prefix-access-list to peer-access-list

here you can specify, to which neighbor you want to send labels as well as for which selected prefixes...

regards

Devang Patel

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