> I don't believe we should have a non PubSub option. Its what we have now to 
> update xTRs map-caches. Its slow and we can do better. Since we have PubSub 
> in a mature state, we should have this design depend on it fully.
> 
> 
> PJ>>> As per current draft, both options are available, however we are open 
> to discuss and conclude it either way for the best solution. Would like to 
> hear if any other opinion on this.

There must have been a typo here. PubSub should absolutely be in the spec. I 
was referring to SMRs, it is the mechanisms that is slow and uses more network 
bandwidth than PubSub.

> 
>> • (Padma): Elaborate of how pETR map-reply would be installed/used at ITR 
>> (so that no forwarding inefficiencies to send every packet to pxTR)
>> (Authors): ITR would encapsulate the packets to the pETRs for only non-EIDs 
>> destinations (for both “EIDs not registered with the Mapping System, or 
>> simply are not known" as mentioned in the draft) since more specific entries 
>> would already be present for known overlay subnets/EID-block-range at ITR to 
>> generate map-request. 
> 
> EIDs not registered are not non-EIDs. Destinations that are unknown are 
> non-EIDs. Your parantetical comment is misleading. 

Well EIDs not registered could be a part of an EID-prefix that IS registered. 
So the best way to describe this is, if a destination IP address from a packet 
header is looked up, and a negative map-reply is returned, the ITR for sure 
knows the destination address IS NOT an EID. 

But the 2 bullets below cover all 3 situations (an EID destination, an EID not 
registered yet, and a non-EID).

> PJ>>> Ok, will clarify. Parenthetical comment is the text from the draft for 
> the EIDs not registered to the mapping system which can be encapsulated to 
> pETRs (implementation can still choose what to encapsulate at ITR), its not 
> the definition of 'non-EIDs'.
> 
> What we agreed on was this:
> 
> (1) Define an EID-block. Destinations that match this block are map-requested.
> (2) Destinations not in an EID-block are non-EIDs and are encapsulated to the 
> pETR
> PJ>>> Correct.

Good. That is the algorithm and it works.

Dino

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