Difference between revisions of "Who-Is-Router-To-Network"

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If this is missing, addressed router responds with it's [[Routing Table]], except for the entries already accessible on the port that the Who-Is-Router-To-Network arrived on. ( See Section 6.6.3.2 pg 60 )
 
If this is missing, addressed router responds with it's [[Routing Table]], except for the entries already accessible on the port that the Who-Is-Router-To-Network arrived on. ( See Section 6.6.3.2 pg 60 )
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Who-Is-RouterTo-Network is generally be broadcast but may be directed to a specific router to learn the contents of its router table. (6.6.3.2)
  
  

Latest revision as of 15:22, 19 August 2018

Used to discover a path to a specified Network Number

The NPDU packet optionally contains a 2 octet Network Number.

If this is missing, addressed router responds with it's Routing Table, except for the entries already accessible on the port that the Who-Is-Router-To-Network arrived on. ( See Section 6.6.3.2 pg 60 )


Who-Is-RouterTo-Network is generally be broadcast but may be directed to a specific router to learn the contents of its router table. (6.6.3.2)


Actions

If the receiving router has the desired Network Number in it's routing table, it responds with I-Am-Router-To-Network. (Unless the Network Number is already accessible elsewhere on the network that the request originated from)

It shall broadcast this response to allow other devices to take advantage of this information

If it does not contain the desired Network Number, it shall broadcast Who-Is-Router-To-Network further down the line as appropriate. SNET and SADR of the originating device to be included in the new broadcasts so return messages make it back to the originating device, unless the originating device is a router, in which case SNET and SADR are already constructed.


Who-Is-Router-To-Network NSDU
Octets Description Function Notes
1 00 Who-Is-Router-To-Network
2 Desired DNET Optional - specifies desired DNET



Keyword List
APDU BBMD BVLC BVLL DADR DNET Encoding I-Am LSAP MAC NPCI NPDU NSAP NSDU SA SADR SNET

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