[c-nsp] filter LDP bindings

Sergio D. sdanelli at gmail.com
Sun Aug 10 23:50:34 EDT 2008


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,

-- 
Sergio Danelli


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