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Page 52 | AlliedWare™ OS How To Note: IGMP
Static IGMP > Explanation of Static IGMP
When the group 224.
1
2.
1
3.
1
4 starts streaming into switch
1
, we can use the command show
switch port=5 counter to watch the number of multicast packets sent on port 5 increase.
This means that the link is up and the static IGMP entry is working.
When we add a static entry on another switch
Now we add a static IGMP entry on port 5 of switch 3, by adding the commands below.
Both switches are potential IGMP Queriers and switch 3 becomes the Querier. This is
because we gave switch 3 a lower IP address (
1
72.3
1
.0.253) than switch
1
(
1
73.3
1
.0.254).
Manager Switch 1> show switch port=5 counter
Switch Port Counters
--------------------------------------------------------------------------
Port 5. Ethernet MAC counters:
Combined receive/transmit packets by size (octets) counters:
64 5502 512 - 1023 160356
65 - 127 153355 1024 - MaxPktSz 109314
128 - 255 110102
256 - 511 137200
General Counters:
Receive Transmit
Octets 0 Octets 341385876
Pkts 0 Pkts 675829
CRCErrors 0
MulticastPkts 0 MulticastPkts 675826
BroadcastPkts 0 BroadcastPkts 3
FlowCtrlFrms 0 FlowCtrlFrms 0
OversizePkts 0
Fragments 0
Jabbers 0
UpsupportOpcode 0
UndersizePkts 0
Collisions 0
LateCollisions 0
ExcessivCollsns 0
Miscellaneous Counters:
MAC TxErr 0
MAC RxErr 0
Drop Events 0
--------------------------------------------------------------------------
X Modify switch 3 Configuration
set stp port=5 edgeport=yes
# IP configuration
enable ip
add ip int=vlan100 ip=172.31.0.253 mask=255.255.255.0
enable ip igmp
enable ip igmp int=vlan100
create ip igmp destination=224.12.13.14 int=vlan100 po=5