[c-nsp] 10G DWDM UP/DOWN

[Geert Nijs]

Just a small question, maybe off topic: is a 10GE DWDM circuit always
composed of 4 x 2.5 Gbps channels, because i was thinking that classical
dwdm consisted of 32x 2.5 Gbps channels.

regards,
Geert

2010/9/23 Good One <good1 at live.com>

>
> I don't have the ability to see the DWDM stats but we have configured our
> end with "hold-down up 5000" (ms), this means wavelengths is fluctuating
> with small amount of time. Yeah, sometimes other wavelengths went down
> parallel but it's not the case always. The interesting things is, most of
> the time circuit comes up after 5 second intervals, I understand this is due
> to "hold-down up 5000" but this also means wavelength is dropping again and
> again and over again.
>
>
>
> Thanks
>
>
>
> BR//
>
> Andrew
>
> > From: paul at paulstewart.org
> > To: good1 at live.com; cisco-nsp at puck.nether.net
> > Subject: RE: [c-nsp] 10G DWDM UP/DOWN
> > Date: Wed, 22 Sep 2010 18:14:30 -0400
> >
> > Do you have the ability to see the DWDM stats? Is the 10G interface
> > configured to drop when wavelength goes down?
> >
> > We need to figure out if the DWDM equipment, the actual fiber connection,
> or
> > the router interfaces is the issue here. I'll bank initially on a problem
> > with the DWDM based connection - any other wavelengths going down or can
> you
> > tell us?
> >
> > Paul
> >
> >
> > -----Original Message-----
> > From: cisco-nsp-bounces at puck.nether.net
> > [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Good One
> > Sent: September-22-10 5:43 PM
> > To: cisco-nsp at puck.nether.net
> > Subject: [c-nsp] 10G DWDM UP/DOWN
> >
> >
> >
> >
> > I have a 10G circuit over DWDM which is flapping very frequently
> > occasionally. DOWN to UP state takes 5 second most of the time, just
> > wondering what could be causing this.
> >
> >
> >
> > Sep 22 21:47:46 T12 mib2d[2061]: SNMP_TRAP_LINK_DOWN: ifIndex 117,
> > ifAdminStatus up(1), ifOperStatus down(2), ifName xe-5/0/0
> > Sep 22 21:47:51 T12 mib2d[2061]: SNMP_TRAP_LINK_UP: ifIndex 117,
> > ifAdminStatus up(1), ifOperStatus up(1), ifName xe-5/0/0
> > Sep 22 21:49:28 T12 mib2d[2061]: SNMP_TRAP_LINK_DOWN: ifIndex 117,
> > ifAdminStatus up(1), ifOperStatus down(2), ifName xe-5/0/0
> > Sep 22 21:49:33 T12 mib2d[2061]: SNMP_TRAP_LINK_UP: ifIndex 117,
> > ifAdminStatus up(1), ifOperStatus up(1), ifName xe-5/0/0
> >
> >
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>
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