Hi,

Here are some comments I have on the model:

·         The model should use the LSR WG as point of contact and no more the 
OSPF WG

·         In the feature multi-topology: s/-Topolgy/-Topology

·         In the packet-type typedef: 
s/database-descripton/database-description.

·         In the container lsa-log description: s/conatiner/container

·         OSPF model has no keychain feature, while ISIS has one. We need to 
agree on a common way to go.

·         In the container link-tlvs, the link-type is an uint8 , wouldn't it 
be better to use an enum to get a description of what is the link type ?

·         Need to expand "af" to "address-family" everywhere in the model 
(comments received from Yang doctor in the ISIS model review => ISIS has done 
this expansion).

·         Ietf-spf-delay timers use uint16 while ISIS uses 
timer-value-milliseconds

·         The grouping instance-config has a "uses 
instance-fast-reroute-state". It would be better to put it in the 
instance-state container.

·         The model uses the "ospf-protocol" identity while IS-IS uses just 
"isis". We need to find a common way to define the protocol identity name. RIP 
yang model uses just "rip", so I suppose OSPF has to align.

·         In the feature "fast-reroute" reference: s/Rereoute/Reroute/

·         The description of the identity "ospf-lsa-type" is strange: "Base 
identity for OSPFv3 and OSPFv3 Link State Advertisements". Do you mean just : 
"Base identity for OSPFv3 Link State Advertisements"

·         It seems that you are using a typedef uint24 for the metric. In IS-IS 
there is  a metric typedef for this purpose.

·          In the if-state-type, the value 6 is referred as "bdr" while the RFC 
talks about "backup". "bdr" works for sure, we just need to agree if we align 
on RFC naming or common usage naming.

·         In the nbr-state-type, why using "ex-start" instead of "exstart", 
again the RFC does not use the "-".

·         In the packet-type: s/Acknowlegement/Acknowledgement/

·         In the ospfv2-router-link, the type is uint8, would be better to have 
an enum. Note that this appears multiple times in the model.

·         In the leaf-list attached-router "line 1376", why using dotted-quad 
instead of ip-address type ?

·         In the grouping area-stat, there are checksum sums that are using 
int32 type while checksums are using uint32 or some other checksum sums (like 
in interface-stat) also use uint32. Need to be consistent here.

·         In the grouping interface-physical-link-config, why do you say that 
it applies to physical interfaces ? Can't you run OSPF on VLANs ?

·         Please set default values as much as you can (for instance in 
interface-common-config or interface-physical-link-config or 
interface-config...)

·         Why do you have interface-physical-link-config and interface-config, 
what difference do you make between the two ? My point is why there is still so 
much containers/leaves in the interface-config and why couldn't we put them in 
the other groupings or even create additional ones if required.

·         What is the purpose of some empty groupings that you have created ? 
like "ospf-config" or "ospf-state"

·         In the multi-topology-area-common-config, you are using a limited 
uint32 type for the default cost while you have defined a uint24 type that you 
can use. It appears also in area-common-config.

On the draft:

·         In the overview (§1), reference to 7950 does not appear as a link, 
maybe an XML issue.

·         §2.2: s/The topology container/The "topologies" container

Brgds,


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Stephane Litkowski
Network Architect
Orange/SCE/EQUANT/OINIS/NET
Orange Expert Future Networks
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