[j-nsp] L-LSP in M-Series ?

[Pedro Fortuna]

Hello Dan & all,

It seems that all M-Series only support 4 TC, but the M320 supports 8.
The purpose of spliting traffic classes per different l2circuits is to
be able to provide triple-play services to home users, and for
instance, to aggregate all voice traffic between two LERs in a single
LSR with Traffic Engineering. But of course, it uses more label space
as you said.

As to VLAN ids, I think they are a pretty big problem because 4K id's
is very limiting i.e. between two LER's you can only setup 4K
l2circuits. Moreover, as it seemed to me, in Juniper M-Series, it is
mandatory to use the same vlan-id in both sides (VLAN translation or
VLAN swapping is not supported).

Does anybody knows if Juniper M-Series supports tagged mode (i.e.
transporting clients VLANs through the MPLS core) ? The Juniper
M-Series must be able to receive Q-in-Q ethernet frames (stack of
S-VLAN and the Client's own VLAN).

Best Regards,
Pedro Fortuna

On 03/09/05, Dan Martin <dmartin at micromuse.com> wrote:
> The implementation I've seen uses the 4 traffic classes available inside
> an LSP.  I guess they were trying to avoid creating more lsps.
> 
> From what I've seen of ATM, the key parameter was how many "calls" I
> could set up per unit time.  This is still pretty early on in MPLS and I
> haven't seen any vendor brag about how many lsps they can set up on a
> box in a unit time.
> 
> This would make me try to minimize the number of lsps I set up on my
> stuff.
> 
> You're right, you have to mark the flows somehow and 802.1Q seems a
> pretty good way to do it.  the next problem you'll have is VLAN Ids.
> I've got a bunch of older switches and they only support 256 vlans.
> 
> -----Original Message-----
> From: juniper-nsp-bounces at puck.nether.net
> [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Pedro Fortuna
> Sent: Friday, September 02, 2005 11:42 PM
> To: juniper-nsp at puck.nether.net
> Subject: [j-nsp] L-LSP in M-Series ?
> 
> Hello list,
> 
> Does anybody knows if in Juniper's M-Series (and latest JUNOS) is
> possible to use RSVP-TE to signal TE tunnels that carry a single
> Traffic Class (L-LSP)?
> Im particularly interested in finding out if for instance, a certain
> l2circuit (martini tunnel) can use an L-LSP.
> 
> As I see it, for this to be possible, there must be a way to split
> ethernet traffic arriving in a VLAN accordingly to the 802.1p bits it
> carries, and to switch each traffic class into a different l2circuit.
> 
> Best Regards,
> Pedro Fortuna
> 
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-- 
Cumprimentos,
Pedro Fortuna