Counts IPv4 UDP traffic keyed by source IP, destination IP and destination MAC address.
| Property | Value |
|---|
| GUID | {095E0C56-D17F-4634-A0B8-E000B4E85140} |
| Layer | L2 Link |
| Input | Packets |
| Key type | IPv4\IPv4\MAC (dotted decimal, colon MAC) |
| Implementation | Lua — newcg-crosskey-mac.lua, fed by udp-counter.lua (apps/analyzers/IGMP_multicast) |
| Trisul App | IGMP_multicast (install from Trisul Apps) |
| Bucket / Topper | 60 s / 300 s |
| Enabled by default | No. newcg-crosskey-mac.lua is not listed in the app's pkg.yaml, so the group is not created unless you add the file. |
What it measures
udp-counter.lua adds the bytes of every IPv4 UDP packet to meter 0, not only multicast packets. The Lua plugin name is "Multicast MAC".- The MAC is the destination MAC of the Ethernet header. For multicast this is the
01:00:5E:xx:xx:xx group MAC. For unicast it is the next-hop MAC.
- IGMP membership is not needed for this group.
Keys
Source IP, destination IP and destination MAC, joined with one backslash. IPs are dotted decimal, the MAC is uppercase with colons.
| Key | Meaning |
|---|
172.19.1.2\239.50.50.50\01:00:5E:32:32:32 | Multicast stream from 172.19.1.2 to group 239.50.50.50. |
192.168.1.20\8.8.8.8\00:1B:21:3A:4F:5C | Unicast UDP (for example DNS) sent through the router with that MAC. |
Special keys
| Key | Meaning |
|---|
SYS:GROUP_TOTALS | Sum of every update made to this group in the interval, that is all IPv4 UDP bytes. |
Meter list
| ID | Name | Type | Units | Top | Bottom | Description |
|---|
| 0 | Multicast | VT_RATE_COUNTER | Bps | 100 | 0 | Bytes of each IPv4 UDP packet, multicast or not. |
| 1 | Unused Cardinality counter | VT_GAUGE | Uniques | 20 | 20 | Reserved cardinality slot. Not populated. |
| 2 | Unused Cardinality counter | VT_GAUGE | Uniques | 20 | 20 | Reserved cardinality slot. Not populated. |