I assume by 'ISDN line' you mean a primary rate service, not basic rate -
otherwise bandwidth when in backup could an issue :-)
Basically, yes, this will work. However, If you load balance across the 2
Mb circuits and use floating static routes for the backup, be aware that
BOTH of your 2 Mb circuits will need to die before your ISDN will kick in.
This may or may not be what you want.
If you want ISDN to activate if one 2 Mb dies, you could try using backup
interface/backup load commands instead of floating statics - I haven't
mucked about with these commands recently so no specific hints but off the
top of my head I think it should work.
JMcL
---------------------- Forwarded by Jenny Mcleod/NSO/CSDA on 26/04/2001
02:46 pm ---------------------------
"Rashid Lohiya" @groupstudy.com on 25/04/2001
07:16:04 pm
Please respond to "Rashid Lohiya"
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Subject: 2x2MB ccts Load Balanced + ISDN B/up [7:1837]
Hi guys, some assistance pls.
I need to connect 2 x 2MB ccts to a Router at each end, load balance
between them, (packet-by-packet, CEF), and also use 2 x ISDN lines to back
up the leased lines.
I am thinking of using static routes with equal admin distance for the 2 x
leased lines.
and using floating static routes,(high ad), to point to the ISDN line.
Also using multilink PPP for bundling more than one ISDN as and when
required.
Has anyone implemented this type of config, anyone got any better ideas of
doing this?
This is the first tiem I am trying this and I am unsure whether this will
work.
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