Инструкции По Установке для 3com S7906E

 

1-17 

Configure the startup query 
count 

mld startup-query-count 
value 

Optional 

For the system default, see 
“Note” below. 

Configure the MLD query 
interval 

mld timer query interval 

Optional 

125 seconds by default. 

Configure the MLD querier 
robustness variable 

mld robust-count 
robust-value 

Optional 

2 times by default 

Configure the maximum 
response delay for MLD 
general query messages 

mld max-response-time 
interval 

Optional 

10 seconds by default 

Configure the MLD last listener 
query interval 

mld 
last-listener-query-interval 
interval 

Optional 

1 second by default 

Configure the MLD other 
querier present interval 

mld timer 
other-querier-present interval

Optional 

For the system default, see 
“Note” below. 

 

z 

If not statically configured, the startup query interval is 1/4 of the “MLD query interval”. By default, 

the MLD query interval is 125 seconds, so the startup query interval = 125 / 4 = 31.25 (seconds). 

z 

If not statically configured, the startup query count is set to the MLD querier robustness variable. By 

default, the MLD querier robustness variable is 2, so the startup query count is also 2.  

z 

 If not statically configured, the other querier present interval is determined by the formula: Other 

querier present interval (in seconds) = [ MLD query interval ] times [ MLD querier robustness 

variable ] plus [ maximum response delay for MLD general query ] divided by two. The default 

values of these three parameters are 125, 2, and 10 respectively, so the other querier present 

interval = 125 x 2 + 10 / 2 = 255 (seconds). 

z 

If statically configured, the startup query interval, the startup query count, and the other querier 

present interval take the configured values. 

 

z 

Make sure that the other querier present interval is greater than the MLD query interval; otherwise 

the MLD querier may frequently change. 

z 

Make sure that the MLD query interval is greater than the maximum response delay for MLD 

general queries; otherwise, multicast group members may be wrongly removed. 

 

MLD fast leave processing is implemented by MLD Snooping. For details, refer to MLD Snooping 

Configuration in the IP Multicast Volume.