[c-nsp] GbE over SDH

[Clinton Work]

I don't know if the service providers equipment is MEF certified, but 
MEF 16 / E-LMI might help here.  Some Cisco equipment already supports 
E-LMI (ME3750, ME3400, 7600) and more will in the future.  I know that 
the Nortel OM3500/OM6500 boxes which provide GbE over SDH services 
support at least 802.3ah. 

Ethernet Local Managment Interface:
http://www.cisco.com/en/US/docs/ios/12_4t/12_4t11/htethlmi.html

Cisco platforms supporting E-LMI:
Cisco 7600: 12.2(33)SRB - E-LMI, 802.1ag, 802.3ah
Cisco 3400ME: 12.2(35)SE1 - E-LMI, 802.1ag, 802.3ah
Cisco 3750ME: 12.2(35)SE1 - E-LMI, 802.1ag, 802.3ah
Cisco IOS routers: 12.4(15)T - E-LMI, 802.1ag, 802.3ah


MKS wrote:
> Hi list
>
> We are getting N times STM-1 connections delivered over GbE (SDH
> network). Currently we are running MPLS-TE over these GbE for
> loadbalancing.
> The problem is that we have seen failures where we loose part of the
> capacity, e.g. loose 2 STM out of 4, and we are unable to detect this
> failure, just a flatline when looking at mrtg graphs.
> The obvious flaw in this scheme is that QoS basically stops working,
> since my equipment sends more high priority traffic than is available.
> One way of solving that is to have QoS also on the SDH GbE.
> This kind of failure is something that I would like to detect but
> don't see how it can be done. I don't know the capabilities of the SDH
> GbE equipment.
> Is there a creative network engineer out there that has a solution for
> this problem?
>
> Regards
> MKS
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-- 

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Clinton Work
Airdrie, AB