[Nfd-dev] Doubts regarding face creation

[Navdeep Uniyal]

Hello All,

I am working on minindn. While creating the topology I am using the following configuration file:
[nodes]
h1: _
h2: _
h3: _
h4: _
g1: _
[links]
h1:g1 delay=10ms bw=10
h2:g1 delay=5ms bw=1
h2:g1 delay=0ms bw=2
h3:g1 delay=0ms bw=1
h4:g1 delay=0ms bw=3


As per my understanding, between h2 and g1 there should be 2 faces created but I am finding only one face created for this, and the other connection I have to make explicitly. Please confirm if this is expected behavior,  if I am doing anything wrong  or my understanding is wrong.

For g1, faces are :
Faces:
  faceid=1 remote=internal:// local=internal:// counters={in={0i 81d 0B} out={132i 0d 0B}} local persistent point-to-point
  faceid=254 remote=contentstore:// local=contentstore:// counters={in={0i 0d 0B} out={0i 0d 0B}} local persistent point-to-point
  faceid=255 remote=null:// local=null:// counters={in={0i 0d 0B} out={0i 0d 0B}} local persistent point-to-point
  faceid=256 remote=fd://18 local=unix:///run/g1.sock counters={in={92i 27d 36942B} out={27i 43d 45212B}} local on-demand point-to-point
  faceid=257 remote=fd://20 local=unix:///run/g1.sock counters={in={1022i 223d 208468B} out={912i 288d 231943B}} local on-demand point-to-point
  faceid=258 remote=udp4://1.0.0.1:6363 local=udp4://0.0.0.0:6363 counters={in={766i 74d 106769B} out={784i 89d 115716B}} non-local persistent point-to-point
  faceid=259 remote=udp4://1.0.0.5:6363 local=udp4://0.0.0.0:6363 counters={in={767i 65d 102476B} out={779i 89d 115339B}} non-local persistent point-to-point
  faceid=260 remote=udp4://1.0.0.13:6363 local=udp4://0.0.0.0:6363 counters={in={767i 67d 103289B} out={779i 89d 115605B}} non-local persistent point-to-point
  faceid=261 remote=udp4://1.0.0.17:6363 local=udp4://0.0.0.0:6363 counters={in={768i 68d 104006B} out={782i 89d 115879B}} non-local persistent point-to-point
  faceid=265 remote=udp4://1.0.0.9:6363 local=udp4://0.0.0.0:6363 counters={in={0i 0d 0B} out={0i 0d 0B}} non-local persistent point-to-point
  faceid=266 remote=fd://25 local=unix:///run/g1.sock counters={in={3i 0d 137B} out={0i 2d 903B}} local on-demand point-to-point

Highlighted one I created explicitly using nfdc register.
Also, please explain the significance of the counters [counters={in={0i 0d 0B} out={0i 0d 0B}}]



Best Regards,
Navdeep Uniyal

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