Filter
Top Products
Page 105 | AlliedWare™ OS How To Note: IGMP
IGMP debugging > Example
Client 2 sends a Membership Report for group 224.
1
2.
1
3.
1
4. Switch
1
sees the report on
vlan
1
00 (port 49) and adds an entry. The entry eventually expires.
Switch 3—a Snooper—sees a Version 2 Membership Query message on vlan
1
00 from the
Querier and forwards it to all ports in the same VLAN. In the debugging output, the list of
ports is the fwdports list. If we take a port out of the VLAN, the fwdports list changes.
X A port entry times out
Manager Switch 1> IGMP Snoop(48): Report -> snooped group 224.12.13.14 added
Adding port 49 for group 224.12.13.14 on vlan100
IGMP Rx(48): Report -> group 224.12.13.14 added
Manager Switch 1> IGMP Snoop Timeout: group=224.12.13.14 (0) is deleted
Deleting all ports for group 224.12.13.14 on vlan100
IGMP Timeout: group=224.12.13.14 (0) is deleted
X Snooped ports change
Manager Switch 3> IGMP Snoop: resending pkt to vlan
utPorts: 1-26 fwdPorts: 1-26
IGMP Snoop(25) on vlan100: Query -> code 100
snooped group 224.0.0.2 added
Adding port 26 for group 224.0.0.2 on vlan100
IGMP MVR Snoop: discard - no MVR snooper for code 17
Manager Switch 3> del vlan=100 port=5
Info (1089003): Operation successful.
Manager Switch 3> IGMP Snoop: resending pkt to vlan
utPorts: 1-4,6-26 fwdPorts: 1-4,6-26
IGMP Snoop(25) on vlan100: Query -> code 100
snooped group 224.0.0.2 added
Adding port 26 for group 224.0.0.2 on vlan100
IGMP MVR Snoop: discard - no MVR snooper for code 17