MTU discovery over multicast path using bit indexed explicit replication
US9544240B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jul 13, 2015 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Sep 17, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/365
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and system provides for path maximum transmission unit (PMTU) discovery (PMTUD) for a multicast distribution implemented in a network using bit indexed explicit replication (BIER) architecture. The network has a set of bit forwarding routers (BFRs) that form a BIER domain including at least one ingress BFR (BFIR) and a set of egress BFRs (BFERs). The method improves efficiency of the PMTUD by limiting probe packet traffic. The method includes selecting a BFER from the set of BFERs in the BIER domain to be processed, generating a probe packet to the selected BFER using a current MTU, sending the probe packet to the selected BFER, and updating the current MTU and adding BFERs identified by a response to the probe packet to the set of BFERs in the BIER domain to be processed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.