What is
NHRP (Next Hop Resolution Protocol) ?
The NHRP (Next Hop Resolution Protocol)
comes from the Internet world and is described in RFC 1932. It
allows to search the ATM corresponding to an IP address in an NBMA network of
several DSL. Specifically, NHRP allows the resolution of an IP address of a
workstation on a remote DSL NBMA address of a network (ATM address, frame
relay, etc.).
Each LIS has a route server, called NHS (Next Hop
Server), often located in a router. When a client requests a connection, it is
for the NHS to which it belongs LIS to obtain routing information on
the packet. If the local NHS can not solve the problem of location, it sends a
request to related NHS, and so on until reaching the LIS to which the recipient
belongs.
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