Re: NHRP domino effect

[Andrew Smith <[e-mail]>]

> From [e-mail] Tue Jul 11 15:55:22 1995
> To: [e-mail]
> Cc: [e-mail]
> Subject: NHRP domino effect
> Date: Tue, 11 Jul 95 15:35:39 PDT
> From: Yakov Rekhter <[e-mail]>

Yakov,

> The NHRP domino effect is clearly undesirable. 
....
> One possible solution for suppressing the domino effect would be to
> require that when a router forwards an NHRP Request, the router
> instantiates a (short-lived) state. The state just contains the route
> that was used to forward the request. If the router receives a packet,
> and the packet triggers an NHRP Request generation by the router, the
> router checks whether the route to forward the request was recently
> used to forward another request. If yes, then the router doesn't 
> generate the request (but still forwards the packet). This solution
> also requires that when a router wants to originate an NHRP Request the
> router should send the request before the data packet that triggered
> the origination of the request.

I think some router implementations might have trouble implementing 
this requirement, yours and ours included :-)


Andrew


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