Hi Jonathan,
How does LMP respond to adjacent link failures? i.e., how does
lmp converge on adjacent data link failures for fault location
identification? this case has not been discussed in the draft.
rgds
bhaskara
-----Original Message-----
From: Jonathan Lang [mailto:jplang@calient.net]
Sent: Friday, July 20, 2001 2:11 PM
To: 'Adnan Ahmed'; Jonathan Lang; ccamp@ops.ietf.org
Cc: Saibal Das
Subject: RE: LMP questions
Adnan,
In your example, you need to run an LMP control channel between B and C.
This control channel could be tunneled through A.
Thanks,
Jonathan
> -----Original Message-----
> From: Adnan Ahmed [mailto:adnan@varros.com]
> Sent: Friday, July 20, 2001 4:02 PM
> To: Jonathan Lang; ccamp@ops.ietf.org
> Cc: Saibal Das
> Subject: Re: LMP questions
>
>
> Jonathan:
>
> I have a follow up question related to your response:
>
> "Assuming that the control channels utilize an out-of-band
> network (such
> as Ethernet) will the control channel topology i.e. the physical
> infrastructure used to realize the CCs, match the fiber topology?
> [Jonathan] The control channel topology does not need to
> match the fiber
> technology."
>
> Consider this scenario involving three OXCs where:
>
> - OXCs A, B and C are connected to each other through fiber
> - Control channel CC-1 is setup b/w A & B and a control
> channel CC-2 is
> setup b/w A & C.
>
> Does your response above imply that it is possible to setup
> TE/data bearing
> links between OXCs B and C by utilizing CC-1 and CC-2 without a direct
> control channel between them?
>
> Thank you for your help.
> -- Adnan
>
>
> ----- Original Message -----
> From: "Jonathan Lang" <jplang@calient.net>
> To: "'Adnan Ahmed'" <adnan@varros.com>; <ccamp@ops.ietf.org>
> Cc: "Saibal Das" <saibal@varros.com>
> Sent: Friday, July 20, 2001 1:38 PM
> Subject: RE: LMP questions
>
>
> > Adnan,
> > Please see inline comments.
> >
> > Thanks,
> > Jonathan
> >
> > -----Original Message-----
> > From: Adnan Ahmed [mailto:adnan@varros.com]
> > Sent: Friday, July 20, 2001 10:59 AM
> > To: ccamp@ops.ietf.org
> > Cc: Saibal Das
> > Subject: LMP questions
> >
> >
> > Hello:
> >
> > I have some questions regarding LMP:
> >
> > 1. What mechanism is used to automatically setup control
> channels b/w two
> > nodes? Will the user or managing application update the
> lmpNbrTable with
> > neighbouring nodes before a node initiates control channel
> setup, or is a
> > node required to incoporate some sort of "ping" to discover
> noeghbours and
> > then initiate CC setup?
> > [Jonathan] Currently, the draft doesn't specify a mechanism to
> automatically
> > setup control channels. There has been some work done in
> the OIF to do
> > this.
> >
> > 2. Assuming that the control channels utilize an
> out-of-band network (such
> > as Ethernet) will the control channel topology i.e. the physical
> > infrastructure used to realize the CCs, match the fiber topology?
> > [Jonathan] The control channel topology does not need to
> match the fiber
> > technology.
> >
> > 3. Can LMP TE links span multiple OXCs (as FA-LSPs do) or
> are LMP TE links
> > only between adjacent elements?
> > [Jonathan] As LMP is currently defined, it is only between adjacent
> > elements.
> >
> > 4. The current LMP draft does not specify how TE links
> formed by LMP are
> > updated into OSPF. Is this LMPs responsiblity or will OSPF pull this
> > information from LMP?
> > [Jonathan] This is implementation dependent.
> >
> >
> > Regards,
> > ====
> > Adnan Ahmed
> > [V] 972.503.8881 x222 [F] 972.503.8885
> >
> >
> >
>