blank.gif (43 bytes)

Church Of The
Swimming Elephant

Search:
5.3.4. What if NBP is broken Connected: An Internet Encyclopedia
5.3.4. What if NBP is broken

Up: Connected: An Internet Encyclopedia
Up: Requests For Comments
Up: RFC 1906
Up: 5. SNMPv2 over DDP
Up: 5.3. Discussion of AppleTalk Addressing
Prev: 5.3.3. How to Turn NBP names into DDP addresses
Next: 6. SNMPv2 over IPX

5.3.4. What if NBP is broken

5.3.4. What if NBP is broken

Under some circumstances, there may be connectivity between two SNMPv2 entities, but the NBP mapping machinery may be broken, e.g.,

  • the NBP FwdReq (forward NBP lookup onto local attached network) mechanism might be broken at a router on the other entity's network; or,

  • the NBP BrRq (NBP broadcast request) mechanism might be broken at a router on the entity's own network; or,

  • NBP might be broken on the other entity's node.

An SNMPv2 entity acting in a manager role which is dedicated to AppleTalk management might choose to alleviate some of these failures by directly implementing the router portion of NBP. For example, such an entity might already know all the zones on the AppleTalk internet and the networks on which each zone appears. Given an NBP lookup which fails, the entity could send an NBP FwdReq to the network in which the agent was last located. If that failed, the station could then send an NBP LkUp (NBP lookup packet) as a directed (DDP) multicast to each network number on that network. Of the above (single) failures, this combined approach will solve the case where either the local router's BrRq-to-FwdReq mechanism is broken or the remote router's FwdReq-to-LkUp mechanism is broken.


Next: 6. SNMPv2 over IPX

Connected: An Internet Encyclopedia
5.3.4. What if NBP is broken

Cotse.Net

Protect yourself from cyberstalkers, identity thieves, and those who would snoop on you.
Stop spam from invading your inbox without losing the mail you want. We give you more control over your e-mail than any other service.
Block popups, ads, and malicious scripts while you surf the net through our anonymous proxies.
Participate in Usenet, host your web files, easily send anonymous messages, and more, much more.
All private, all encrypted, all secure, all in an easy to use service, and all for only $5.95 a month!

Service Details

 
.
www.cotse.com
Have you gone to church today?
.
All pages ©1999, 2000, 2001, 2002, 2003 Church of the Swimming Elephant unless otherwise stated
Church of the Swimming Elephant©1999, 2000, 2001, 2002, 2003 Cotse.com.
Cotse.com is a wholly owned subsidiary of Packetderm, LLC.

Packetderm, LLC
210 Park Ave #308
Worcester, MA 01609