commits May 2024

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations (c36b36cf)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit c36b36cf79251a1df7489fc0f23996fc5013a078 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:22:41 2024 +0000 doc: batman-adv/Multicast-optimizations >--------------------------------------------------------------- c36b36cf79251a1df7489fc0f23996fc5013a078 batman-adv/Multicast-optimizations.textile | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/batman-adv/Multicast-optimizations.textile b/batman-adv/Multicast-optimizations.textile index 82d6660f..2e70221d 100644 --- a/batman-adv/Multicast-optimizations.textile +++ b/batman-adv/Multicast-optimizations.textile @@ -14,17 +14,19 @@ The current multicast optimizations in batman-adv provide a basic infrastructure !batman-adv-multicast-type-decision.png! -h3. 1) No multicast listener/router: Discard +h3. A) No multicast listener/router: Discard !{width: 66%;}basic-multicast-no-receiver.png! batman-adv detects whether there are any potential IPv4/IPv6 multicast listeners or multicast routers interested in traffic to the given multicast destination address. If not then the packet is never forwarded into the mesh network. -h3. 2) batman-adv multicast packet +h3. B) batman-adv multicast packet -If all nodes support the [[Multicast-Packet-Type|batman-adv multicast packet]] and encapsulating the IP packet in it, with all its destination node entries included, would fit into a 1280 bytes frame (excluding outer ethernet frame header) then this packet type is chosen for forwarding. +!{width: 66%;}basic-multicast-multiple-receivers-mcast.png! -h3. 3) batman-adv unicast packet(s) +If all nodes support the [[Multicast-Packet-Type|batman-adv multicast packet type]] and encapsulating the IP packet in it, with all its destination node entries included, would fit into a 1280 bytes frame (excluding outer ethernet frame header) then this packet type is chosen for forwarding. + +h3. C) batman-adv unicast packet(s) !{width: 66%;}basic-multicast-multiple-receivers.png!

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations (a240871a)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit a240871a75295a91ef542d6e0eea4a01c44d23f1 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:23:46 2024 +0000 doc: batman-adv/Multicast-optimizations >--------------------------------------------------------------- a240871a75295a91ef542d6e0eea4a01c44d23f1 batman-adv/Multicast-optimizations.textile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/batman-adv/Multicast-optimizations.textile b/batman-adv/Multicast-optimizations.textile index 2e70221d..8e3394da 100644 --- a/batman-adv/Multicast-optimizations.textile +++ b/batman-adv/Multicast-optimizations.textile @@ -38,7 +38,7 @@ h3. Limitations In the following cases multicast packets are still distributed via [[Broadcast|classic flooding]]: -* If the multicast packet is not an IPv4/IPv6 packet +* If the multicast packet/frame is not an IPv4/IPv6 packet * If the [[Multicast-Packet-Type|batman-adv multicast packet type]] is not applicable * If there are more than #multicast-fanout (default: 16) listeners/routers for a specific multicast group.

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations-tech (345ca7e7)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit 345ca7e7d3276a9cfc69ea1be82fd425d936520f Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:28:03 2024 +0000 doc: batman-adv/Multicast-optimizations-tech >--------------------------------------------------------------- 345ca7e7d3276a9cfc69ea1be82fd425d936520f batman-adv/Multicast-optimizations-tech.textile | 1 - 1 file changed, 1 deletion(-) diff --git a/batman-adv/Multicast-optimizations-tech.textile b/batman-adv/Multicast-optimizations-tech.textile index 6c4bd9be..67721d76 100644 --- a/batman-adv/Multicast-optimizations-tech.textile +++ b/batman-adv/Multicast-optimizations-tech.textile @@ -107,7 +107,6 @@ For routable multicast addresses, further consideration has to be given: The acc h2. Limitations * groups with more listeners (+routers) than #multicast-fanout (default: 16) don't get optimized -* optimization for routable IPv4 multicast in bridged scenarios is not supported yet * optimization for link-local IPv4 (224.0.0.0/24) or all-nodes IPv6 multicast (ff02::1) is only done if no node announces BATADV_MCAST_WANT_ALL_UNSNOOPABLES, that is no node configures a bridge on batman-adv. * no awareness for source-specific multicasts * multicast packets over VLANs are always flooded

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations-tech (8fc7cf5b)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit 8fc7cf5b4902887905e51292997473e6c77716c7 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:31:45 2024 +0000 doc: batman-adv/Multicast-optimizations-tech >--------------------------------------------------------------- 8fc7cf5b4902887905e51292997473e6c77716c7 batman-adv/Multicast-optimizations-tech.textile | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/batman-adv/Multicast-optimizations-tech.textile b/batman-adv/Multicast-optimizations-tech.textile index 67721d76..44aa9565 100644 --- a/batman-adv/Multicast-optimizations-tech.textile +++ b/batman-adv/Multicast-optimizations-tech.textile @@ -113,11 +113,11 @@ h2. Limitations h2. Next Steps / Roadmap -* optimization for groups with two or more members: -** many-to-some: implement batman-adv multicast packet type supporting a list of destination addresses (to reduce ICMPv6 overhead like Neighbor Solicitation Messages, Router Solicitation Messages, MLD Reports, ...) -** some-to-many / streaming: implement path tracking and use these patches (see [[Multicast-ideas-updated]]) +* optimization for groups with many members: +** implement path tracking and use these patches (see [[Multicast-ideas-updated]]) or +** implement generic (but esp. for MCAST Tracker TVLV) TVLV->hash compression/caching * implement some faster listener roaming mechanism for bridged in hosts (for instance announce (multicast-address, source address) pairs and use general TT roaming mechanism) -* implement source-specific multicast in Linux bridge and batman-adv +* implement source-specific multicast in batman-adv * multicast TT announcements and forwarding have to be performed per VLAN * ...

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations-tech (0fb3c5ca)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit 0fb3c5ca36458c8dba30b11422796ca82fc72348 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:33:20 2024 +0000 doc: batman-adv/Multicast-optimizations-tech >--------------------------------------------------------------- 0fb3c5ca36458c8dba30b11422796ca82fc72348 batman-adv/Multicast-optimizations-tech.textile | 1 + 1 file changed, 1 insertion(+) diff --git a/batman-adv/Multicast-optimizations-tech.textile b/batman-adv/Multicast-optimizations-tech.textile index 44aa9565..98e95e73 100644 --- a/batman-adv/Multicast-optimizations-tech.textile +++ b/batman-adv/Multicast-optimizations-tech.textile @@ -123,4 +123,5 @@ h2. Next Steps / Roadmap h2. Further Readings +* [[Multicast-Packet-Type|Multicast Optimizations – Multicast Packet Type]] * [[multicast-optimizations-flags|Multicast Optimizations – Flags Explained]] \ No newline at end of file

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations (651af8be)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit 651af8bed3139b25d629716d3986919e3de056e6 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:06:17 2024 +0000 doc: batman-adv/Multicast-optimizations >--------------------------------------------------------------- 651af8bed3139b25d629716d3986919e3de056e6 batman-adv/Multicast-optimizations.textile | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/batman-adv/Multicast-optimizations.textile b/batman-adv/Multicast-optimizations.textile index 1c9acb82..eaeffd84 100644 --- a/batman-adv/Multicast-optimizations.textile +++ b/batman-adv/Multicast-optimizations.textile @@ -36,7 +36,8 @@ h3. Limitations In the following cases multicast packets are still distributed via classic flooding: -* If there are more than #multicast-fanout (default: 16) listeners for a specific multicast group. +* If the [[Multicast-Packet-Type|batman-adv multicast packet type]] is not applicable +* If there are more than #multicast-fanout (default: 16) listeners/routers for a specific multicast group. Additionally, in _bridged_ scenarios multicast packets are still flooded in the following cases:

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations (5f849021)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit 5f849021ee8237c1ff52f755b632b71fbc72d97e Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:10:10 2024 +0000 doc: batman-adv/Multicast-optimizations >--------------------------------------------------------------- 5f849021ee8237c1ff52f755b632b71fbc72d97e batman-adv/Multicast-optimizations.textile | 1 + 1 file changed, 1 insertion(+) diff --git a/batman-adv/Multicast-optimizations.textile b/batman-adv/Multicast-optimizations.textile index eaeffd84..42a13437 100644 --- a/batman-adv/Multicast-optimizations.textile +++ b/batman-adv/Multicast-optimizations.textile @@ -36,6 +36,7 @@ h3. Limitations In the following cases multicast packets are still distributed via classic flooding: +* If the multicast packet is not an IPv4/IPv6 packet * If the [[Multicast-Packet-Type|batman-adv multicast packet type]] is not applicable * If there are more than #multicast-fanout (default: 16) listeners/routers for a specific multicast group.

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations (0c5eca8c)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit 0c5eca8cb6c67c8c3cd0e25195a384520c93f7e2 Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:11:06 2024 +0000 doc: batman-adv/Multicast-optimizations >--------------------------------------------------------------- 0c5eca8cb6c67c8c3cd0e25195a384520c93f7e2 batman-adv/Multicast-optimizations.textile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/batman-adv/Multicast-optimizations.textile b/batman-adv/Multicast-optimizations.textile index 42a13437..0ad8d7f0 100644 --- a/batman-adv/Multicast-optimizations.textile +++ b/batman-adv/Multicast-optimizations.textile @@ -34,7 +34,7 @@ h3. Limitations !{width: 66%;}basic-multicast-many-receivers.png! -In the following cases multicast packets are still distributed via classic flooding: +In the following cases multicast packets are still distributed via [[Broadcast|classic flooding]]: * If the multicast packet is not an IPv4/IPv6 packet * If the [[Multicast-Packet-Type|batman-adv multicast packet type]] is not applicable

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[doc] backup-redmine,main: doc: batman-adv/Multicast-optimizations (ed150523)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit ed150523494c743e3b9033c33b8423cab444daff Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:11:31 2024 +0000 doc: batman-adv/Multicast-optimizations >--------------------------------------------------------------- ed150523494c743e3b9033c33b8423cab444daff batman-adv/Multicast-optimizations.textile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/batman-adv/Multicast-optimizations.textile b/batman-adv/Multicast-optimizations.textile index 0ad8d7f0..82d6660f 100644 --- a/batman-adv/Multicast-optimizations.textile +++ b/batman-adv/Multicast-optimizations.textile @@ -48,7 +48,7 @@ Additionally, in _bridged_ scenarios multicast packets are still flooded in the h2. How to deactivate the multicast optimizations? -By default multicast optimizations are activated. You can force the old behaviour, classic flooding of all multicast frames, on a certain node via the following command, executed as root (here: bat0): +By default multicast optimizations are activated. You can force the old behaviour, [[Broadcast|classic flooding]] of all multicast frames, on a certain node via the following command, executed as root (here: bat0): <pre>batctl meshif bat0 multicast_forceflood 1</pre>

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[doc] backup-redmine,main: doc: batman-adv/basic-multicast-multiple-receivers-mcast.dia (12667342)
by postmaster＠open-mesh.org 10 May '24

10 May '24

Repository : ssh://git@diktynna/doc On branches: backup-redmine,main >--------------------------------------------------------------- commit 1266734278dd6305b0897459b4336f95e9b55e1d Author: Linus Lüssing <linus.luessing(a)c0d3.blue> Date: Fri Apr 19 02:21:28 2024 +0000 doc: batman-adv/basic-multicast-multiple-receivers-mcast.dia >--------------------------------------------------------------- 1266734278dd6305b0897459b4336f95e9b55e1d batman-adv/basic-multicast-multiple-receivers-mcast.dia | Bin 0 -> 2128 bytes 1 file changed, 0 insertions(+), 0 deletions(-) diff --git a/batman-adv/basic-multicast-multiple-receivers-mcast.dia b/batman-adv/basic-multicast-multiple-receivers-mcast.dia new file mode 100644 index 00000000..cfacadee Binary files /dev/null and b/batman-adv/basic-multicast-multiple-receivers-mcast.dia differ

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commits May 2024