Next Hop Resolution Protocol

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The Next Hop Resolution Protocol (NHRP) is an extension of the ATM ARP routing mechanism[1] that is sometimes used to improve the efficiency of routing computer network traffic over a non-broadcast, multiple access (NBMA) network.[2] It is defined in IETF RFC 2332,[3] and further described in RFC 2333.[4] It can be used by a sender to determine a route with the fewest hops to a receiver.[5] The protocol differs from ARP-type protocols in that it allows routing optimization across multiple IP subnets.[6] NHRP is implemented by means of next-hop servers across IP subnets.[7] NHRP forms a part of the Multiprotocol Encapsulation over ATM (MPOA) protocol as described in RFC 2684.[8][9] It also plays a role in Cisco's Dynamic Multipoint Virtual Private Network.[2] A limitation of NHRP is its inability to improve[clarify] multicast protocols.[1]

Description

From RFC 2332: "[NHRP] allows a source station (a host or router), wishing to communicate over [an NBMA] subnetwork, to determine the internetworking layer addresses and NBMA addresses of suitable 'NBMA next hops' toward a destination station."

References

  1. ↑ 1.0 1.1 White, P.P. (April 1998). "ATM switching and IP routing integration: the next stage in Internet evolution?". IEEE Communications Magazine 36 (4): 79–83. doi:10.1109/35.667418. http://www.cl.cam.ac.uk/~jac22/otalks/atmipint.pdf. Retrieved 18 June 2016. 
  2. ↑ 2.0 2.1 "NHRP". http://www.cisco.com/c/en/us/td/docs/ios/12_4/ip_addr/configuration/guide/hadnhrp.html#wp1054887. Retrieved 17 June 2016. 
  3. ↑ B., Cole; J., Luciani; N., Doraswamy; D., Piscitello; D., Katz (April 1998). NBMA Next Hop Resolution Protocol (NHRP). https://tools.ietf.org/html/rfc2332. Retrieved 17 June 2016. 
  4. ↑ Cansever, Derya H. (April 1998). NHRP Protocol Applicability Statement. https://tools.ietf.org/html/rfc2333. Retrieved 17 June 2016. 
  5. ↑ Rouse, Margaret. "What is Next Hop Resolution Protocol (NHRP)? - Definition from WhatIs.com". http://searchnetworking.techtarget.com/definition/Next-Hop-Resolution-Protocol. Retrieved 17 June 2016. 
  6. ↑ Luciani, James V. (1 January 1997). "Next-hop resolution protocol". SPIE Proceedings. Broadband Networking Technologies 3233: 161–165. doi:10.1117/12.290456. Bibcode: 1997SPIE.3233..161L. http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=933004. 
  7. ↑ Ahmad, Khalid (2 April 2004) (in en). Sourcebook of ATM and IP Internetworking. John Wiley & Sons. p. 360. ISBN 9780471660941. https://books.google.com/books?id=BjeG2uAaNK4C&q=%22Next+Hop+Resolution+Protocol%22&pg=PA360. Retrieved 18 June 2016. 
  8. ↑ Dan, Grossman; Juha, Heinanen (September 1999). Multiprotocol Encapsulation over ATM Adaptation Layer 5. https://tools.ietf.org/html/rfc2684. 
  9. ↑ Newman, P.; Lyon, T.; Minshall, G. (1 March 1996). "Flow labelled IP: A connectionless approach to ATM". Proceedings of IEEE INFOCOM '96. Conference on Computer Communications. 3. pp. 1251–1260 vol.3. doi:10.1109/INFCOM.1996.493071. ISBN 0-8186-7293-5. https://www.researchgate.net/publication/2615390. Retrieved 18 June 2016. 

External links




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