The IP Over NBMA (ION) Archive[Date Prev][Date Next][Thread Prev][Thread Next] [Date Index][Thread Index][Author Index][Subject Index] Error in NHRP version 8?
I looked through the draft version 08 of NHRP trying to understand where the NHS functions must/may be placed in a network. My first guess was that, as "normal" configuration all the router on the NBMA net are NHS. In chapter 4 a more general scenario is depicted: the NHS is a distinct network element and the NHCs are configured with the "local NHS" to which send queries. (This may lead to have an network of NHSs overlaied to the network of router). If this is correct isn't there an error in the "Protocol overview" (section 2.2 page 5-6)? It seems to suggest that the NHRP-query shall be sent to the first router along the catenet path toward the destination: The protocol proceeds as follows. An event occurs triggering station S to want to resolve the NBMA address of a path to D. [...] Station S first determines the next hop to station D through normal routing processes [...] If the next hop is reachable through one of its NBMA interfaces, S constructs an Next Hop Resolution Request packet (see Section 5.2.1) [...] Station S emits the Next Hop Resolution Request packet towards the destination. In addition: what if the next hop is NOT reachable? Thank for any comment on that. Luca ___________________________________________________________________________ Luca Fantolino CSELT (a STET Company) Tel: +39 11 228 7543 via G. Reiss Romoli, 274 Fax: +39 11 228 5069 10148 Torino - ITALY E-Mail: Luca.Fantolino@Cselt.Stet.It ___________________________________________________________________________ |
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