[c-nsp] Fractional DS3, dsu bandwidth statement and circuit interruption

Doug McIntyre merlyn at geeks.org
Mon Dec 8 08:58:53 EST 2014

On Mon, Dec 08, 2014 at 07:26:18AM -0600, papaia wrote:
> Need to change the bandwidth statement in the DSU line item config (up-ing
> the available bandwidth for a fractional DS3), for a router placed remotely
> from my office. Lacking an off-band access to this router, I am wondering
> if that change would trigger a circuit connectivity drop, and if so, if
> there would be a recovery of such, on its own, or if I would be better off
> with feet (and hands) on the ground, to reload or even fix.

It will probably be disruptive, but IIRC, the subrate DS3s just used
the 'dsu bandwidth' command? That gives you a chance to just type the
command on the remote, and then on the local and wait for it to sync
up again.

One trick you can do, is to schedule a reload up for say 5 minutes, do
your config, see if it works, and then cancel the reload and 'write mem'.
Not quite as neat as "commit confirm" on JunOS, but still gives you a
safty net.

Now, if you needed to mess around with subrate T1, you would
definately need onsite hands on, to unconfigure the t1 groups, and then
reconfigure the t1 groups. But the DS3 was just the single command
from what I remember.

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