Большое спасибо.
>>Как я понял это необходимо для mpls. Это можно как то ограничить
>>на cisco?
>
>Ну и не включай tag-switching ip(mpls ip) на интерфейсах.
>
>MPLS FAQ For Beginners
>http://www.cisco.com/warp/public/105/mpls_faq_4649.shtml
>
>Q. What protocol and port numbers do LDP and TDP use to
>distribute labels to LDP/TDP peers?
>
>A. LDP uses TCP port 646, and TDP uses TCP port 711.
>These ports are opened on the router interface only when mpls
>ip is configured on the interface. The use of TCP as
>a transport protocol results in reliable delivery of LDP/TDP information with
>robust flow control and congestion handling mechanisms.