3com S7906E 설치 설명서

 

1-20 

To do... 

Use the command... 

Clear IGMP multicast group 
information 

reset igmp [ all-instance | vpn-instance 
vpn-instance-name ] group { all | interface 
interface-type interface-number { all | 
group-address [ mask { mask | 
mask-length } ] [ source-address [ mask 
{ mask | mask-length } ] ] } } 

Available in 
user view 

Clear layer 2 port information 
about IGMP multicast groups 

reset igmp group port-info { all | 
group-address } [ vlan vlan-id ] 

Available in 
user view 

Clear IGMP SSM mappings 

reset igmp [ all-instance | vpn-instance 
vpn-instance-name ] ssm-mapping group 
{ all | interface interface-type 
interface-number { all | group-address 
[ mask { mask | mask-length } ] 
[ source-address [ mask { mask | 
mask-length } ] ] } } 

Available in 
user view 

 

z 

The reset igmp group command cannot clear the IGMP multicast group information of static joins.  

z 

The  reset igmp group port-info command cannot clear Layer 2 port information about IGMP 

multicast groups of static joins.  

 

The reset igmp group command may cause an interruption of receivers’ reception of multicast data. 

 

z 

Receivers receive VOD information through multicast. Receivers of different organizations form 

stub networks N1 and N2, and Host A and Host C are receivers in N1 and N2 respectively.  

z 

Switch A in the PIM network connects to N1, and both Switch B and Switch C connect to N2.  

z 

Switch A connects to N1 through VLAN-interface 100, and to other devices in the PIM network 

through VLAN-interface 101.  

z 

Switch B and Switch C connect to N2 through their respective VLAN-interface 200, and to other 

devices in the PIM network through VLAN-interface 201 and VLAN-interface 202 respectively.  

z 

IGMPv2 is required between Switch A and N1. IGMPv2 is also required between the other two 

switches and N2. Switch B acts as the IGMP querier in N2 because it has a lower IP address.