gitproxy/RTLPlayground
1
0 Fork 0
mirror of https://github.com/logicog/RTLPlayground.git synced 2026-10-29 17:54:14 +08:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #540 from DrDoof/fix/igmp-link-local

Browse Source 
igmp: leave groups in 224.0.0.0/24 to flooding
This commit is contained in:
bloq authored and GitHub committed 2026-10-14 02:01:59 -05:00
2 parents 69151362a0 f88f655f5a
commit 8224b06f9e
3 files changed
+6
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

doc/igmp.md
+3
View File
@@ -86,6 +86,9 @@ for frames to 01:00:5e:xx:xx:xx and returns 0 when the frame is not a trapped IG
so that it is passed on to the IP stack. IGMPv1/v2 reports (0x12, 0x16) join the group given
in the IGMP header, IGMPv2 leaves (0x17) leave it, IGMPv3 reports use the first group record
(type 4 joins, type 3 leaves). Trapped IGMP frames arrive without a VLAN tag.
Reports for groups in 224.0.0.0/24 are ignored: the switch floods that block
even with IGMP on, and an entry for a group such as 224.0.0.251 (mDNS) would
otherwise limit it to the ports that reported it, as RFC 4541 warns against.
`igmp_show()` prints out the IGMP configuration on the CLI.