Telefonaktiebolaget Lm Ericsson (publ)

Lars Bertil Marklund

G&ouml;ran Hansson

Patrik Herneld

Lars Åke Lindholm

Jouni Kemppainen

Bengt Engman

Embodiments of the present invention relate to methods and arrangements for configuring the L2GPs in a first STP domain connected towards a second STP domain such that L2GPs in the first STP domain are assigned with the same Pseudo Root identity. Thus the Pseudo Root identity does not have to be changed if one of the L2GPs goes down, which implies that count-to-infinity loops may be avoided. It should be noted that only one L2GP is allowed to be open towards the second STP domain. The root path costs are assigned to the L2GPs towards the pseudo root and the value of the root path cost controls which of the L2GPs that should be open. The most preferred L2GP will be given a root path cost=0, the second best L2GP will have a path cost which is high enough so the two ports never will be open at the same time if there is connectivity between the Ethernet switches having the L2GPs.

Methods and arrangements for configuring the L2GPs in a first STP domain connected towards a second STP domain

The present invention relates to a telecommunications node () that is able to handle IP-traffic and to terminate telecommunications traffic. The node includes a forwarding functionality with a number of forwarding engines (). The node includes means for creating internal IP-hosts () for terminating IP-traffic within the node (), each of which IP-host is attached to an IP-port () of a forwarding engine (). The IP-hosts are each assigned an individual IP-address, which makes it possible to forward IP-traffic to the IP-hosts () by means of using the IP-address as a destination address for the IP-traffic. Information relating to the IP-addresses of the internal IP-hosts () is included in forwarding tables of the forwarding engines (). It is possible to perform load distribution of terminating IP-traffic based on the IP-addresses of the internal IP-hosts.

Method and telecommunications node for distribution of terminating traffic within telecommunications node

The method and arrangement according to the present invention relate to communication networks using ATM-(Asynchronous Transfer Mode) connections for data transmission, particularly ATM-connections adapted for transmission of, e.g., IP-packets. Transmission of IP-packets via an IP-link in an ATM-based communication network is done by a link function block that is implemented between IP-level and ATM-level. The function block includes selector for selecting an operative ATM-connection, which is assigned to said IP-link, monitor for monitoring the operability of selected ATM-connections and re-selector for reselecting a redundant ATM-connection if one of the assigned connections is detected to be inoperative.

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Stockholm, Sweden

Lars Bertil Marklund