+1 from me too. Jeroen. On 10 May 2012, at 13:41, Jason Zurawski wrote:
I believe this makes the most sense as a service, I will add this comment into the ticket as well.
-jason
On 5/10/12 6:05 AM, thus spake Freek Dijkstra:
My apologies. The XML for example #2 in my previous mail was wrong.
Here are two proposals how to describe adaptation (encoding of a client layer Port in a server layer Port).
Option 1: As adaptation service. (similar to a switching service) ----------------------------------------------------------------- egress server layer Port --(hasService)--> adaptation Service adaptation Service --(providesPort)--> egress client layer Port*
ingress server layer Port --(hasService)--> de-adaptation Service de-adaptation Service --(providesPort)--> ingress client layer Port*
Option 2: As Adaptation or DeAdaptation object (similar to a Link) ------------------------------------------------------------------ egress client layer Port* --(isSource)--> Adaptation egress server layer Port --(isSink)--> Adaptation
ingress server layer Port --(isSource)--> DeAdaptation ingress client layer Port* --(isSink)--> DeAdaptation
*Port or PortGroup, if we decide to allow descriptions of multiple Ports -eg. all VLANs- as a group for efficiency purposes.
Option 1 is more natural choice for dynamic adaptations, e.g. VLANs in Ethernet. Option 2 is more natural choice for static adaptations, e.g. Ethernet over a wavelength.
We can even allow both: option 1 for dynamic adaptations, and option 2 for static adaptations. But I rather just pick one of the two.
Please let me know your preference, or alternative proposal. Feedback can also be made at https://forge.ogf.org/sf/go/artf6514
XML examples follows. Sorry for the quoting, otherwise my mail client would have wrapped the lines. If you like the raw XML, you can get it at https://forge.ogf.org/svn/repos/nml-examples/201205-adaptation/adaptation.xm... and are copied below.
XML example option 1 (as Service) --------------------------------- (example taken from nml-examples/201109-switchservice/2vlans_option2.xml)
egress server layer Port --(hasService)--> adaptation Service adaptation Service --(providesPort)--> egress client layer Port
ingress server layer Port --(hasService)--> de-adaptation Service de-adaptation Service --(providesPort)--> ingress client layer Port
Adaptation type (here: 802.1Q) is described with a nml:adptationFunction XML element.
<!-- ATLA ge-6/0/0 egress server layer Port --> <nml:Port id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_out"> <nml:name>ge-6/0/0 out</nml:name> <nml:capacity units="bps">10000000000</nml:capacity> <nml:Relation type="hasService"> <nml:Service idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_out_adaptation" /> </nml:Relation> </nml:Port>
<!-- ATLA ge-6/0/0 adaptation Service --> <nml:Service type="adaptation" id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_out_adaptation"> <nml:name>VLAN adaptation service</nml:name> <nml:adptationFunction>IEEE-802.1q</nml:adptationFunction> <nml:Relation type="providesPort"> <nml:Port idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0.42_out" /> </nml:Relation> </nml:Service>
<!-- ATLA ge-6/0/0 ingress server layer Port --> <nml:Port id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_in"> <nml:name>ge-6/0/0 in</nml:name> <nml:capacity units="bps">10000000000</nml:capacity> <nml:Relation type="hasService"> <nml:Service idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_in_deadaptation" /> </nml:Relation> </nml:Port>
<!-- ATLA ge-6/0/0 Deaptation Service --> <nml:Service type="deadaptation" id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_in_deadaptation"> <nml:name>deadaptation service</nml:name> <nml:adptationFunction>IEEE-802.1q</nml:adptationFunction> <nml:Relation type="providesPort"> <nml:Port idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0.42_in" /> </nml:Relation> </nml:Service>
XML example option 2 (as Adaptation object) ------------------------------------------- egress client layer Port --(isSource)--> Adaptation egress server layer Port --(isSink)--> Adaptation
ingress server layer Port --(isSource)--> DeAdaptation ingress client layer Port --(isSink)--> DeAdaptation
Adaptation type (here: 802.1Q) is described with a type XML attribute.
<!-- ATLA ge-6/0/0 egress server layer Port --> <nml:Port id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_out"> <nml:name>ge-6/0/0 out</nml:name> <nml:capacity units="bps">10000000000</nml:capacity> <nml:Relation type="isSink"> <nml:Adaptation idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_out_adaptation" /> </nml:Relation> </nml:Port>
<!-- ATLA ge-6/0/0 VLAN 42 egress client layer Port --> <nml:Port id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0.42_out"> <nml:Relation type="isSource"> <nml:Adaptation idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_out_adaptation" /> </nml:Relation> </nml:Port>
<!-- ATLA ge-6/0/0 adaptation Service --> <nml:Adaptation type="IEEE-802.1q" id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_out_adaptation"> <nml:name>VLAN adaptation service</nml:name> </nml:Adaptation>
<!-- ATLA ge-6/0/0 ingress server layer Port --> <nml:Port id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_in"> <nml:name>ge-6/0/0 in</nml:name> <nml:capacity units="bps">10000000000</nml:capacity> <nml:Relation type="isSource"> <nml:DeAdaptation idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_in_deadaptation" /> </nml:Relation> </nml:Port>
<!-- ATLA ge-6/0/0 VLAN 42 ingress client layer Port --> <nml:Port id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0.42_in"> <nml:Relation type="isSink"> <nml:DeAdaptation idRef="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_in_deadaptation" /> </nml:Relation> </nml:Port>
<!-- ATLA ge-6/0/0 Deaptation Service --> <nml:DeAdaptation type="IEEE-802.1q" id="urn:ogf:network:internet2.edu:rtr.atla.net:ge-6-0-0_in_deadaptation"> <nml:name>deadaptation service</nml:name> </nml:DeAdaptation>
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