RE: [rtgwg] draft-ietf-rtgwg-mrt-frr-algorithm-03

["Anil Kumar S N (VRP Network BL)" <[e-mail]>]

Chris,

                Yes it definitely makes sense,  thanks I should have thought about this.

Thanks & Regards
Anil S N

"Be liberal in what you accept, and conservative in what you send" - Jon Postel


From: Chris Bowers [mailto:[e-mail]]
Sent: 23 June 2015 20:19
To: Anil Kumar S N (VRP Network BL); Gábor Sándor Enyedi; [e-mail]; Alia Atlas; [e-mail]
Cc: [e-mail]; [e-mail]
Subject: RE: [rtgwg] draft-ietf-rtgwg-mrt-frr-algorithm-03

Anil,

Reusing the topology below, R (the gadag_root) will have block_id=0 while A,B,C,D and E will have block_id=1. so the first OR'd condition in In_Common_Block(R,y) will always be false when determining if R is in the same block as A,B,C,D, or E.  The third OR'd condition will also be false because R.localroot = None.  However, the second OR'd condition will be true because R = B.localroot (for example), returning true for In_Common_Block(R,B). Does this make sense?

Chris
             [E]----|
            (5,0)   |
              |     |
              |     |
             [R]   [D]---[C]
            (0,0) (4,0) (3,0)
              |           |
              |           |
             [A]---------[B]
            (1,0)       (2,0)

From: Anil Kumar S N (VRP Network BL) [mailto:[e-mail]]
Sent: Tuesday, June 23, 2015 6:04 AM
To: Chris Bowers; Gábor Sándor Enyedi; [e-mail]<mailto:[e-mail]>; Alia Atlas; [e-mail]<mailto:[e-mail]>
Cc: [e-mail]<mailto:[e-mail]>; [e-mail]<mailto:[e-mail]>
Subject: RE: [rtgwg] draft-ietf-rtgwg-mrt-frr-algorithm-03

Hi Chirs,

gadag_root.localroot will remain as  None at the end of algorithm and gadag_root.block_id will be 0 (rest of the nodes in the block will be 1 higher than gadag_root.block_id)
Below psudocode will return false while comparing a node in a block and gadag_root.

                Please correct me if I am wrong.

In_Common_Block(x, y)
  if ( (x.block_id is y.block_id)
       or (x is y.localroot) or (y is x.localroot) )
     return true
  return false

Thanks & Regards
Anil S N

"Be liberal in what you accept, and conservative in what you send" - Jon Postel