Patent ID: 8174978
Filing Date: 2012-05-08
Classification: H04L

Abstract:
1. A method of congestion management within a switch or network of connected switches wherein at least one of the switches has a plurality of ingress ports and a plurality of egress ports, the method comprising: when congestion is detected at a first ingress or egress port, sending a message to an upstream port connected to the first ingress or egress port indicating that congestion has occurred at a particular port and requesting storage at the upstream port of data packets destined for the first ingress or egress port; and, in dependence on the amount of data packets destined for the congested port stored at said upstream port, sending from the upstream port to a further upstream port a message informing said further upstream port of the congestion at the first ingress or egress congested port, said further upstream port storing at said further upstream port data packets destined for the first ingress or egress congested port.