Re: (ASCEND) Ascend Max T1 and FR backup

[Peter Lalor <plalor@infoasis.com>]

>From: "Tim Brown" <tim@sumter.net>
>
>I also found this:
>
>Ethernet>Connections>CONNECTIONNAME>Session Options>Backup=
>
>The paramter reference says "If the primary connection is unavailable, the
>MAX will automatically divert traffic to the backup connection. When the
>primary connection is restored, traffic again uses the primary connection."
>Is anyone using the "Backup" setting for the connection profile and if so
>has it worked as advertised? Peter, do you have a BRI profile specified as
>the "Backup" in this manner for your T1 profile? Thanks.

That's how you (and we) do it. It works as advertised as long as the 
Pipe 130 software is current (there were various related bugs in 
earlier releases) and you do it exactly as Lucent suggests on esight, 
with the backup profile being the _first_ profile and the T1 listed 
later.

I've only used it in a situation where the far end T1 and backup ISDN 
terminated in a single RAS (a TNT), in which case the same 
primary/backup profiles exist on each end. I've never tried in a 
situation where backup was a different device, so YMMV. It should 
just be a case of running a routing protocol and getting the routing 
preferences right.

BTW, as I need to run RIP over the backup (when it's up), I found 
that a Call filter that filters RIP was required in order for the 
link to drop. Experiment to see what works for you.

>From: Peter Lalor <plalor@infoasis.com>
>  >>From: "Tim Brown" <tim@sumter.net>
>>>
>>>Does anyone use ISDN or mulitlink analog as a backup for your T1 and Frame
>>>Relay connections to you Maxen. We thought we could just do it through the
>>>max, but our T1 and PRI dial-up trunks are provisioned in-bound only and
>>>reject any outbound calls. We've have had problems with three different
>>>backhaul circuits recently (all different telcos) and thought it might be
>>>time to put some sort of low bandwidth backup (say 128K or so) in place as
>a
>>>solution. An automatic backup would be ideal(i.e. all traffic on FR
>circuit,
>>>FR circuit goes down, traffic starts moving on backup ISDN or Analog
>>>line(s). Thanks in advance for any suggestions and/or comments.
>>
>>Well, the first thing you'll need is some kind of ISDN line that you
>>can actually place outbound calls on. If you can't get that turned on
>>on your PRI, you could try a BRI, either on your Max or on some
>>little router like a Pipeline.
>>
>>I have had ISDN backup working with some success in the past, either
>>with a T1 being backed up by a BRI, both connected to the same
>>Pipeline 130, and also with a BRI plugged into a Pipeline 75 backing
>>up a T1 plugged into a Max 4000.
>>
>>The latter was a bit problematic for me, either with the link not
>>coming up automatically or not dropping afterwards, but I think you
>>should be able to get it going properly with some fiddling with route
>>preferences.
>>
>>When you decide how you're going to tackle it, tell the list and
>>we'll try to help.
>>--
>>
>  >Peter Lalor           Infoasis
-- 

Peter Lalor           Infoasis
plalor@infoasis.com   http://www.infoasis.com/

"Where's my burrito?" -- Homer
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