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US 8,576,702 B2Granted
Receiving multicast traffic at non-designated routers
AssigneeAlcatel Lucent
InventorsSuresh Boddapati, Venugopal V. Hemige, Jayant Kotalwar
Life of this patent
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Abstract
A multicast stream is received. At a non-designated router, a multicast stream is received with respect to which the non-designated router is not a designated router responsible for sending the multicast stream to a host. The received multicast stream is discarded.
Claims26
A method for receiving a multicast stream, comprising:
- receiving at a non-designated router a multicast stream sent concurrently from the same source to a designated router and the non-designated router, where the designated router is responsible for sending the multicast stream to a host, where the multicast stream is broadcasted to a multicast internet protocol (IP) address on the network, where the non-designated router and the designated router receive the multicast stream by subscribing to the multicast IP address;
- determining at the non-designated router whether the designated router has failed;
- electing the non-designated router as an elected designated router and sending the received multicast stream to the host from the elected designated router, if it is determined that the designated router has failed, wherein the non-designated router has been elected as the elected designated router from among a plurality of non-designated routers at least in part due to a priority identifier value assigned to the elected designated router and wherein the value is based at least in part on whether the elected designated router has subscribed to the multicast IP address;
- and
- refraining from sending the received multicast stream to the host and discarding the received multicast stream from the non-designated router, if it is determined that the designated router has not failed.
2 more elements
A system for receiving a multicast stream, comprising:
- a designated router configured to:
- receive a multicast stream from a source, where the designated router is responsible for sending the multicast stream to a host and where the multicast stream is broadcasted to a multicast internet protocol (IP) address on the network;
- and
- a non-designated router configured to:
- receive the multicast stream sent concurrently from the same source where the non-designated router and the designated router receive the multicast stream by subscribing to the multicast IP address;
- determine whether the designated router has failed;
- elect itself as an elected designated router and send the received multicast stream to the host, if it is determined that the designated router has failed, wherein the non-designated router is elected as the elected designated router from among a plurality of non-designated routers at least in part due to a priority identifier value assigned to the elected designated router and wherein the value is based at least in part on whether the elected designated router has subscribed to the multicast IP address;
- and
- refrain from sending the received multicast stream to the host and discard the received multicast stream, if it is determined that the designated router has not failed.
6 more elements
A computer program product for receiving a multicast stream, the computer program product being embodied in a non-transitory computer readable medium and comprising computer instructions for:
- receiving at a non-designated router a multicast stream sent concurrently from the same source to a designated router and the non-designated router, where the designated router is responsible for sending the multicast stream to a host, where the multicast stream is broadcasted to a multicast internet protocol (IP) address on the network, where the non-designated router and the designated router receive the multicast stream by subscribing to the multicast IP address;
- determining at the non-designated router whether the designated router has failed;
- electing the non-designated router as an elected designated router and sending the received multicast stream to the host from the elected designated router, if it is determined that the designated router has failed, wherein the non-designated router has been elected as the elected designated router from among a plurality of non-designated routers at least in part due to a priority identifier value assigned to the elected designated router and wherein the value is based at least in part on whether the elected designated router has subscribed to the multicast IP address;
- and
- refraining from sending the received multicast stream to the host and discarding the received multicast stream from the non-designated router, if it is determined that the designated router has not failed.
2 more elements
Dependencies are inferred from the claim text.