i have a question ? How many relay nodes can be supported at NetworkCoding ( mtu 1546 ) .

Hello Dear Sir :

i read some detail about NetworkCoding , my understanding :

every relay node will detects neighbors packet at promisc mode and combine these packet into a single transmission ,

and every relay mode will keep some usaful ( Ingoing: c8:3a:35:c9:ce:71 .... ) and they will add some encoded information into packet ( will send destination )

So we will run the part --- ip link set dev wlan0 mtu 1546 ( more than 1532 )

but i have a question ? How many relay nodes can be supported at NetworkCoding ( mtu 1546 ) .

Thanks

Tiger

batctl nn
Node: c8:3a:35:c9:ce:71
Ingoing: c8:3a:35:c9:ce:71
Outgoing: c8:3a:35:c9:ce:71

[root@alarmpi ~]# batctl nc
enabled

[root@alarmpi ~]# batctl statistics
tx: 18
tx_bytes: 2076
tx_dropped: 32
rx: 767
rx_bytes: 33993
forward: 0
forward_bytes: 0
mgmt_tx: 7956
mgmt_tx_bytes: 542012
mgmt_rx: 3132
mgmt_rx_bytes: 222572
frag_tx: 0
frag_tx_bytes: 0
frag_rx: 0
frag_rx_bytes: 0
frag_fwd: 0
frag_fwd_bytes: 0
tt_request_tx: 0
tt_request_rx: 1
tt_response_tx: 1
tt_response_rx: 0
tt_roam_adv_tx: 0
tt_roam_adv_rx: 0
dat_get_tx: 2
dat_get_rx: 0
dat_put_tx: 0
dat_put_rx: 4
dat_cached_reply_tx: 0
nc_code: 0
nc_code_bytes: 0
nc_recode: 0
nc_recode_bytes: 0
nc_buffer: 17
nc_decode: 0
nc_decode_bytes: 0
nc_decode_failed: 0
nc_sniffed: 0

When i compile the part , whether i need make
CONFIG_BATMAN_ADV_BATMAN_V=y at batman-adv-2016.2

i read some detail about NetworkCoding , my understanding :

every relay node will detects neighbors packet at promisc mode and combine these packet into a single transmission ,

batctl nc 1
echo 1 > /sys/class/net/bat0/mesh/network_coding ip link set dev wlan0 promisc on
ip link set dev wlan0 mtu 1546

if i send a packet from host A to hostC via hostB, whether hostB will open relay mode at layer2 .

but i have a question ? How many relay nodes can be supported at NetworkCoding ( mtu 1546 ) .

Hi,

Quoted 2 lines

When i compile the part , whether i need make
CONFIG_BATMAN_ADV_BATMAN_V=y at batman-adv-2016.2

2016.2 is "old". And BATMAN_V has nothing to do with network coding.

Quoted 4 lines

i read some detail about NetworkCoding , my understanding :

every relay node will detects neighbors packet at promisc mode and combine these packet into a single transmission ,

I think Martin can help here. He also provided some documentation:

* https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding
* https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding-technical
* https://downloads.open-mesh.org/batman/papers/batman-adv_network_coding.pdf
* https://vbn.aau.dk/da/publications/catwoman(214ee21a-e786-495d-85c9-3efac4718ead).html
* https://downloads.open-mesh.org/batman/misc/wbmv4-network_coding.avi

And it will not try to forward each packet is overheard. Instead it will try to find coding opportunities which it then uses to forward its own packets in less transmissions (by using packets which the other nodes should already know).

Quoted 4 lines

batctl nc 1
echo 1 > /sys/class/net/bat0/mesh/network_coding ip link set dev wlan0 promisc on
ip link set dev wlan0 mtu 1546

Your cards/drivers will most likely not even support promiscuous mode. Some of them require to have an monitor mode interface at the same time and some of them will simply not work.

You can test it by simply checking what tcpdump is showing you on the underlying interface (wlan0). If it doesn't show you the packets between two other nodes then promiscuous mode is not working for you.

The feature itself is not used very often (Martin, please correct me here).

It is not enabled by default because it is not making things "better" all the time [1]. So it is also not tested as much as other components in batman-adv and you should think first if it is really useful for your scenario/HW. I knew at least from some Freifunk communities played around when it was enabled by default but had to revert when they experienced "non functional mesh links" (nothing more about it is known to me - sorry Martin).

network coding can only (when lucky) try to combine some packets - but this will only work when promiscuous mode is actually working and the nodes can overhear packets. Otherwise it will (in theory - Martin please correct me if I overlooked a safety mechanism) just create a lot of coded packets which cannot be decoded anymore.

Hi,

Quoted 2 lines

When i compile the part , whether i need make
CONFIG_BATMAN_ADV_BATMAN_V=y at batman-adv-2016.2

2016.2 is "old". And BATMAN_V has nothing to do with network coding.

Quoted 4 lines

i read some detail about NetworkCoding , my understanding :

every relay node will detects neighbors packet at promisc mode and combine these packet into a single transmission ,

I think Martin can help here. He also provided some documentation:

* https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding
* https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding-technical
* https://downloads.open-mesh.org/batman/papers/batman-adv_network_coding.pdf
* https://vbn.aau.dk/da/publications/catwoman(214ee21a-e786-495d-85c9-3efac4718ead).html
* https://downloads.open-mesh.org/batman/misc/wbmv4-network_coding.avi

And it will not try to forward each packet is overheard. Instead it will try to find coding opportunities which it then uses to forward its own packets in less transmissions (by using packets which the other nodes should already know).

Quoted 4 lines

batctl nc 1
echo 1 > /sys/class/net/bat0/mesh/network_coding ip link set dev wlan0 promisc on
ip link set dev wlan0 mtu 1546

Your cards/drivers will most likely not even support promiscuous mode. Some of them require to have an monitor mode interface at the same time and some of them will simply not work.

You can test it by simply checking what tcpdump is showing you on the underlying interface (wlan0). If it doesn't show you the packets between two other nodes then promiscuous mode is not working for you.

The feature itself is not used very often (Martin, please correct me here). It is not enabled by default because it is not making things "better" all the time [1]. So it is also not tested as much as other components in batman-adv and you should think first if it is really useful for your scenario/HW. I knew at least from some Freifunk communities played around when it was enabled by default but had to revert when they experienced "non functional mesh links" (nothing more about it is known to me - sorry Martin).

Quoted 2 lines

if i send a packet from host A to hostC via hostB, whether hostB will open relay mode at layer2 .

I completely failed to parse this.

batman-adv will send your data from hostA to hostC via hostB when the TQ value for the link "from hostA to hostC via hostB" is higher than the TQ value for the link "hostA to hostC directly". This has nothing to do with network coding and is a standard feature of batman-adv (this is actually what it is about).

network coding can only (when lucky) try to combine some packets - but this will only work when promiscuous mode is actually working and the nodes can overhear packets. Otherwise it will (in theory - Martin please correct me if I overlooked a safety mechanism) just create a lot of coded packets which cannot be decoded anymore. This seems to be especially problematic when some nodes are for example 2x2 MIMO devices and others are 3x3. At least this would be a good way to let the 2x2 miss important packets when the 3x3 devices talk between each other.

I would even guess that things like dynamic transmission power would make overhearing packets also more problematic.

Quoted 2 lines

but i have a question ? How many relay nodes can be supported at NetworkCoding ( mtu 1546 ) .

I am not sure what you are asking here. The implementation in batman-adv can combine two packets into one. And this combining of these two packets is done by exact one relay node. The decoding is done by the two receiving nodes. What you can build with it is been shown in the documentation from Martin. The network coding used here is therefore done by a relay node and its neighbors. But there can be multiple relay nodes in the mesh doing network coding at the same time.

I personally haven't used network coding with batman-adv. But since you've created multiple new threads on the mailing list [1,2,3,4] (beside the private mail *grml*) - here is at least a pseudo-answer.

Kind regards,
Sven

[1] https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding#Drawbacks
[2] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016586.html
[3] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016587.html
[4] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016588.html
[5] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016592.html

Hello Dear Sven and Martin:

Thanks for your advisement

I hope to aviod Excavation
of underground pipeline in the smart community or Park .

if Batman-adv can support
smart relay ( networking code ) at mesh network really , and it will be very valuable for us .

i think one of core
valuable point is relay mode and Client roaming

i prepare to build more ap
evironment and test for the part later

As market competition intensifies,

the gap between similar
productsis getting smaller and smaller,

likewise the evolution of
growing homogenization trends within the industry.

i hope we can find
valuable point for Blue Ocean each other .

if you have some different
point , and I would be happy to be the first and build win-win mode each other .

Best Regards

Tiger

Quoted 95 lines

Hi,

Quoted 2 lines

When i compile the part , whether i need make
CONFIG_BATMAN_ADV_BATMAN_V=y at batman-adv-2016.2

2016.2 is "old". And BATMAN_V has nothing to do with network coding.

Quoted 4 lines

i read some detail about NetworkCoding , my understanding :

every relay node will detects neighbors packet at promisc mode and combine these packet into a single transmission ,

I think Martin can help here. He also provided some documentation:

* https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding
*
https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding-technica
l *
https://downloads.open-mesh.org/batman/papers/batman-adv_network_coding.p
df *
https://vbn.aau.dk/da/publications/catwoman(214ee21a-e786-495d-85c9-3efac
4718ead).html *
https://downloads.open-mesh.org/batman/misc/wbmv4-network_coding.avi

And it will not try to forward each packet is overheard. Instead it will try to find coding opportunities which it then uses to forward its own packets in less transmissions (by using packets which the other nodes should already know).

Quoted 4 lines

batctl nc 1
echo 1 > /sys/class/net/bat0/mesh/network_coding
ip link set dev wlan0 promisc on
ip link set dev wlan0 mtu 1546

Your cards/drivers will most likely not even support promiscuous mode. Some of them require to have an monitor mode interface at the same time and
some of them will simply not work.

You can test it by simply checking what tcpdump is showing you on the underlying interface (wlan0). If it doesn't show you the packets between two other nodes then promiscuous mode is not working for you.

The feature itself is not used very often (Martin, please correct me here).
It is not enabled by default because it is not making things "better" all the time [1]. So it is also not tested as much as other components in batman-adv and you should think first if it is really useful for your scenario/HW. I knew at least from some Freifunk communities played around when it was enabled by default but had to revert when they experienced "non
functional mesh links" (nothing more about it is known to me - sorry Martin).>

Quoted 2 lines

if i send a packet from host A to hostC via hostB, whether hostB will open relay mode at layer2 .

I completely failed to parse this.

batman-adv will send your data from hostA to hostC via hostB when the TQ value for the link "from hostA to hostC via hostB" is higher than the TQ value for the link "hostA to hostC directly". This has nothing to do with network coding and is a standard feature of batman-adv (this is actually what it is about).

network coding can only (when lucky) try to combine some packets - but this will only work when promiscuous mode is actually working and the nodes can overhear packets. Otherwise it will (in theory - Martin please correct me if I overlooked a safety mechanism) just create a lot of coded packets which cannot be decoded anymore. This seems to be especially problematic when some nodes are for example 2x2 MIMO devices and others are 3x3. At least this would be a good way to let the 2x2 miss important packets when the 3x3 devices talk between each other.

I would even guess that things like dynamic transmission power would make overhearing packets also more problematic.

Quoted 2 lines

but i have a question ? How many relay nodes can be supported at NetworkCoding ( mtu 1546 ) .

I am not sure what you are asking here. The implementation in batman-adv can combine two packets into one. And this combining of these two packets is done by exact one relay node. The decoding is done by the two receiving nodes. What you can build with it is been shown in the documentation from Martin. The network coding used here is therefore done by a relay node and its neighbors. But there can be multiple relay nodes in the mesh doing network coding at the same time.

I personally haven't used network coding with batman-adv. But since you've created multiple new threads on the mailing list [1,2,3,4] (beside the private mail *grml*) - here is at least a pseudo-answer.

Kind regards,
Sven

Quoted 11 lines

[1]
https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding#Drawback
s [2]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016586.ht
ml [3]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016587.ht
ml [4]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016588.ht
ml [5]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016592.ht
ml

End of encapsulated message

Quoted 10 lines

Hello Dear Sven and Martin:

Thanks for your advisement

I hope to aviod Excavation
of underground pipeline in the smart community or Park .

if Batman-adv can support
smart relay ( networking code ) at mesh network really , and it will be very valuable for us .

Hi Johnzeng,

why are you insisting on using network coding? Batman-adv can do relay without network coding enabled, this is part of the basic mesh technology. Network Coding (or CATWOMAN) was research project/proof of concept implementation which isn't actively maintained right now. But from what I understood, your setups can be supported with "standard" batman-adv mesh.

Thanks,
Simon

Quoted 133 lines

i think one of core
valuable point is relay mode and Client roaming

i prepare to build more ap
evironment and test for the part later

As market competition intensifies,

the gap between similar
productsis getting smaller and smaller,

likewise the evolution of
growing homogenization trends within the industry.

i hope we can find
valuable point for Blue Ocean each other .

if you have some different
point , and I would be happy to be the first and build win-win mode each other .

Best Regards

Tiger

Quoted 90 lines

Hi,

Quoted 2 lines

When i compile the part , whether i need make
CONFIG_BATMAN_ADV_BATMAN_V=y at batman-adv-2016.2

2016.2 is "old". And BATMAN_V has nothing to do with network coding.

Quoted 4 lines

i read some detail about NetworkCoding , my understanding :

every relay node will detects neighbors packet at promisc mode and combine these packet into a single transmission ,

I think Martin can help here. He also provided some documentation:

* https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding
*
https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding-technica
l *
https://downloads.open-mesh.org/batman/papers/batman-adv_network_coding.p
df *
https://vbn.aau.dk/da/publications/catwoman(214ee21a-e786-495d-85c9-3efac
4718ead).html *
https://downloads.open-mesh.org/batman/misc/wbmv4-network_coding.avi

And it will not try to forward each packet is overheard. Instead it will try to find coding opportunities which it then uses to forward its own packets in less transmissions (by using packets which the other nodes should already know).

Quoted 4 lines

batctl nc 1
echo 1 > /sys/class/net/bat0/mesh/network_coding
ip link set dev wlan0 promisc on
ip link set dev wlan0 mtu 1546

Your cards/drivers will most likely not even support promiscuous mode. Some of them require to have an monitor mode interface at the same time and
some of them will simply not work.

You can test it by simply checking what tcpdump is showing you on the underlying interface (wlan0). If it doesn't show you the packets between two other nodes then promiscuous mode is not working for you.

The feature itself is not used very often (Martin, please correct me here).
It is not enabled by default because it is not making things "better" all the time [1]. So it is also not tested as much as other components in batman-adv and you should think first if it is really useful for your scenario/HW. I knew at least from some Freifunk communities played around when it was enabled by default but had to revert when they experienced "non
functional mesh links" (nothing more about it is known to me - sorry Martin).>

Quoted 2 lines

if i send a packet from host A to hostC via hostB, whether hostB will open relay mode at layer2 .

I completely failed to parse this.

batman-adv will send your data from hostA to hostC via hostB when the TQ value for the link "from hostA to hostC via hostB" is higher than the TQ value for the link "hostA to hostC directly". This has nothing to do with network coding and is a standard feature of batman-adv (this is actually what it is about).

network coding can only (when lucky) try to combine some packets - but this will only work when promiscuous mode is actually working and the nodes can overhear packets. Otherwise it will (in theory - Martin please correct me if I overlooked a safety mechanism) just create a lot of coded packets which cannot be decoded anymore. This seems to be especially problematic when some nodes are for example 2x2 MIMO devices and others are 3x3. At least this would be a good way to let the 2x2 miss important packets when the 3x3 devices talk between each other.

I would even guess that things like dynamic transmission power would make overhearing packets also more problematic.

Quoted 2 lines

but i have a question ? How many relay nodes can be supported at NetworkCoding ( mtu 1546 ) .

I am not sure what you are asking here. The implementation in batman-adv can combine two packets into one. And this combining of these two packets is done by exact one relay node. The decoding is done by the two receiving nodes. What you can build with it is been shown in the documentation from Martin. The network coding used here is therefore done by a relay node and its neighbors. But there can be multiple relay nodes in the mesh doing network coding at the same time.

I personally haven't used network coding with batman-adv. But since you've created multiple new threads on the mailing list [1,2,3,4] (beside the private mail *grml*) - here is at least a pseudo-answer.

Kind regards,
Sven

Quoted 11 lines

[1]
https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding#Drawback
s [2]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016586.ht
ml [3]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016587.ht
ml [4]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016588.ht
ml [5]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016592.ht
ml

End of encapsulated message

Hello Dear Simon:

How will i do via batctl ? Do you mean
that batman-adv can support it by default at layer 2 ?

                              if Relay mode is based on Layer 3 ( 

route or Nat ) , it will be very complex and Infeasible at large wifi network

let's assume the environment , node A
can communicate with node B directly via wifi and node B can communicate with node C directly via wifi.

but node A can't communicate with node C
directly via wifi ( master reason : Weak signal) ,

Maybe Batman-adv can forward full
Broadcast packet to next nodeC via nodeB , but if node A will build tcp connection between node A and nodeC ,

I can understand network coding , it will
be same as proxy or Intermediator at Layer 2 ,

Your meaning : Batman-adv can build
Similar mechanism ( Intermediator ) via intermediator , it wil be relay based real application packet ( not relay based Broadcast packet)

Thanks

Best Regards

TIger

Quoted 169 lines · CET johnzeng via B.A.T.M.A.N

Quoted 5 lines

Hello Dear Sven and Martin:

Thanks for your
advisement

Quoted 8 lines

I hope to aviod
Excavation
of underground pipeline in the smart community or Park .

if Batman-adv can
support
smart relay ( networking code ) at mesh network really , and it will be very valuable for us .

Hi Johnzeng,

why are you insisting on using network coding? Batman-adv can do relay without network coding enabled, this is part of the basic mesh technology. Network Coding (or CATWOMAN) was research project/proof of concept implementation which isn't actively maintained right now. But from what I understood, your setups can be supported with "standard" batman-adv mesh.

Thanks,
Simon

Quoted 144 lines

i think one of core
valuable point is relay mode and Client roaming

i prepare to build
more ap
evironment and test for the part later

As market competition intensifies,

the gap between similar
productsis getting smaller and smaller,

likewise the
evolution of
growing homogenization trends within the industry.

i hope we can find
valuable point for Blue Ocean each other .

if you have some
different
point , and I would be happy to be the first and build win-win mode each other .

Best Regards

Tiger

Quoted 102 lines

Hi,

Quoted 2 lines

When i compile the part , whether i need make
CONFIG_BATMAN_ADV_BATMAN_V=y at batman-adv-2016.2

2016.2 is "old". And BATMAN_V has nothing to do with network coding.

Quoted 4 lines

i read some detail about NetworkCoding , my understanding :

every relay node will detects neighbors packet at promisc mode and combine these packet into a single transmission ,

I think Martin can help here. He also provided some documentation:

* https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding
*
https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding-technica

l *
https://downloads.open-mesh.org/batman/papers/batman-adv_network_coding.p

df *
https://vbn.aau.dk/da/publications/catwoman(214ee21a-e786-495d-85c9-3efac

4718ead).html *
https://downloads.open-mesh.org/batman/misc/wbmv4-network_coding.avi

And it will not try to forward each packet is overheard. Instead it will try to find coding opportunities which it then uses to forward its own packets in less transmissions (by using packets which the other nodes should already know).

Quoted 4 lines

batctl nc 1
echo 1 > /sys/class/net/bat0/mesh/network_coding
ip link set dev wlan0 promisc on
ip link set dev wlan0 mtu 1546

Your cards/drivers will most likely not even support promiscuous mode. Some of them require to have an monitor mode interface at the same time and
some of them will simply not work.

You can test it by simply checking what tcpdump is showing you on the underlying interface (wlan0). If it doesn't show you the packets between two other nodes then promiscuous mode is not working for you.

The feature itself is not used very often (Martin, please correct me here).
It is not enabled by default because it is not making things "better" all the time [1]. So it is also not tested as much as other components in batman-adv and you should think first if it is really useful for your scenario/HW. I knew at least from some Freifunk communities played around when it was enabled by default but had to revert when they experienced "non
functional mesh links" (nothing more about it is known to me - sorry Martin).>

Quoted 2 lines

if i send a packet from host A to hostC via hostB, whether hostB will open relay mode at layer2 .

I completely failed to parse this.

batman-adv will send your data from hostA to hostC via hostB when the TQ value for the link "from hostA to hostC via hostB" is higher than the TQ value for the link "hostA to hostC directly". This has nothing to do with network coding and is a standard feature of batman-adv (this is actually what it is about).

network coding can only (when lucky) try to combine some packets - but this will only work when promiscuous mode is actually working and the nodes can overhear packets. Otherwise it will (in theory - Martin please correct me if I overlooked a safety mechanism) just create a lot of coded packets which cannot be decoded anymore. This seems to be especially problematic when some nodes are for example 2x2 MIMO devices and others are 3x3. At least this would be a good way to let the 2x2 miss important packets when the 3x3 devices talk between each other.

I would even guess that things like dynamic transmission power would make overhearing packets also more problematic.

Quoted 2 lines

but i have a question ? How many relay nodes can be supported at NetworkCoding ( mtu 1546 ) .

I am not sure what you are asking here. The implementation in batman-adv can combine two packets into one. And this combining of these two packets is done by exact one relay node. The decoding is done by the two receiving nodes. What you can build with it is been shown in the documentation from Martin. The network coding used here is therefore done by a relay node and its neighbors. But there can be multiple relay nodes in the mesh doing network coding at the same time.

I personally haven't used network coding with batman-adv. But since you've created multiple new threads on the mailing list [1,2,3,4] (beside the private mail *grml*) - here is at least a pseudo-answer.

Kind regards,
Sven

[1]
https://www.open-mesh.org/projects/batman-adv/wiki/NetworkCoding#Drawback

s [2]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016586.ht

ml [3]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016587.ht

Quoted 7 lines

ml [4]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016588.ht

ml [5]
https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-November/016592.ht

ml

End of encapsulated message

Date: Wed, 09 Nov 2016 11:56:36 +0800
From: johnzeng <[email protected]>
To: Simon Wunderlich <[email protected]>
CC: [email protected], Sven Eckelmann <[email protected]>,
Martin Hundebøll <[email protected]>
Subject: Re: [B.A.T.M.A.N.] i have a question ? How many relay nodes can be
supported at NetworkCoding ( mtu 1546 ) .

Quoted 2 lines

if Relay mode is based on Layer 3 ( route or
Nat ) , it will be very complex and Infeasible at large wifi network

Date: Wed, 09 Nov 2016 11:50:30 +0800
From: johnzeng <[email protected]>
To: Simon Wunderlich <[email protected]>
CC: [email protected], Sven Eckelmann <[email protected]>,
Martin Hundebøll <[email protected]>
Subject: Re: [B.A.T.M.A.N.] i have a question ? How many relay nodes can be
supported at NetworkCoding ( mtu 1546 ) .

I can understand network coding , it will be
same as proxy or Intermediator at Layer 2 ,

Your meaning : Batman-adv can build Similar
mechanism ( Intermediator ) via intermediator , it wil be relay based real application packet ( not relay based Broadcast packet)

Quoted 10 lines · johnzeng via B.A.T.M.A.N

Date: Wed, 09 Nov 2016 11:50:30 +0800
From: johnzeng <[email protected]>
To: Simon Wunderlich <[email protected]>
CC: [email protected], Sven Eckelmann <[email protected]>,
Martin Hundebøll <[email protected]>
Subject: Re: [B.A.T.M.A.N.] i have a question ? How many relay nodes can be
supported at NetworkCoding ( mtu 1546 ) .

I can understand network coding , it will be
same as proxy or Intermediator at Layer 2 ,

Maybe there is a complete misunderstanding what "network coding" is?

Maybe an easier expression would be "packet mixing" or "magic packet mangling" [1].

Any code that does something with networking is usually *not* "network coding" (at least in this context here).

Have a look at the links Sven has provided earlier.

Quoted 4 lines

Your meaning : Batman-adv can build Similar
mechanism ( Intermediator ) via intermediator , it wil be relay based real application packet ( not relay based Broadcast packet)

Just try it :-). Compile batman-adv *without network coding* with your A-B-C scenario and see how it magically works, too :-).

Regards, Linus

[1]: Please no expert hit me :D. I know, ultimately, network coding would replace packet based networks, if I remember Frank's talk
in Leipzig correctly

https://www.youtube.com/watch?v=yluj7e_rfVE