Re: Telnet over WAN latency troubleshooting

Netopia 3346 V8.5r1

Turns out it does have a CLI, but the ISP had not provided the
authentication info. I have that now for all three sites, and it looks
like it may be helpful.

Ping testing and traceroute both return statistics and timing. So far
some initial tests from the central modem to the LAN side of the remote
modems is showing 3-4% packet loss to one location, 0% to the other,
with equivalent times (50-60ms for 64 byte packets, 70-120ms for 372
byte packets, no time to test larger). Both sites were experiencing
significant latency before, during, and after testing.

The central modem's log showed a series of disconnect/reconnect at the
PPPoE level on 1/23 after 9:15PM, after 10:06PM, and after 11:13PM, on
1/19 after 11:05PM and after 11:34PM, and on 1/17 after 11:09PM and
after 11:16PM. There are no log entries at all for daytime operations
(when the problems are occurring) and all of the event groups covered 7
to 30 minutes. It does look like the problems happen in bursts when
they happen.

The VPN tunnels are set to remain on all the time; they have
keepalives, and will renegotiate every 8 hours, so there is constant
data flow. The service was purchased as 'always on, static IP'.

I'll do bidirectional testing tomorrow. I'll also try to find out
about any MTU padding on the modems. I can't find any way to change
that on the DECservers, and I haven't touched it on the Alpha either;
just on the firewalls.

Rich

.