[NTISP] Problem with routing?

Sam Lowe ( (no email) )
Wed, 11 Aug 1999 07:24:51 -0500


I have encountered a technical problem related to routing and am at my wits
end. Anyone with previous experience out there... We have been to all the
manufacturers involved and all disavow any knowledge, or how to help,
although they confirm the problem is real.

Here's the scenario:

ISDN users connect to our Total Control equipped with HiPer ARCs and DSPs
(the TC is latest firmware/software all the way). They connect via Cisco
760s, Eicon DIVAs, and Netgear Rx328. At random instances they lose ability
to route http traffic (the router and any public addresses on the LAN side
are pingable, can FTP, etc), and stop receiving http data. They must reset
the router and it clears the problem immediately. Occasionally they will
also lose e-mail capability, but this always follows the loss of http

We have watched the connections at the Total Control and we see the outbound
request from their router, and see the returned http traffic from a website.
It just never seems to get past the router. We only have problems where we
have Hiper DSPs installed. In our other POPs where we have modem cards (and
HiPer ARCs) the problem does not seem to exist. It does not exist in any of
our other connnectivity solutions. We have fiddled with offloading and just
about every other switch we can see that might be a contributor. We lean
toward the problem as being in the TC, but just can't seem to get our hands
around it.

Any help would be greatly appreciated.

Samuel S. Lowe
Director, Data Services
UniversalCom, Inc.

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