The Routing Over Large Clouds Mailing List Archive by date

[yakov@watson.ibm.com]

Ref:  Your note of Fri, 03 Mar 1995 14:20:35 -0500


Jeffrey,

>While NHRP is certainly not a panacea for all the worlds routing
>problems, to lobby for language whose only purpose is to denegrate
>this solution as unworthy of deployment is, in my opinion, excessive.

On the other hand stating that

    "It is recommended that during Router-to-Router operation, options that
    help to detect loops be invoked and NHRP requests be reissued
    periodically."

strikes me as wishful thinking. For instance, would you please explain
how any of the options that NHRP has, or how reissuing NHRP requests
periodically would help to solve the looping problem that Joel Halpern
posted to the list about a month ago.

Curtis's observation about the need to avoid non-NBMA paths is also correct.
Saying that "it is advisable to avoid the non-NBMA paths between the routers
where NHRP is being run" falls into the category of wishful thinking as well,
and certainly doesn't match the reality.

>There are a great many cases where NHRP would be very effective and where
>the routing loop problem would not arise.

It would certainly help if you'll enumerate these cases that involve
router-to-router, and explain how NHRP mechanisms would help to prevent
routing loop problem.

Yakov.