Supermicro SuperBlade SBM-GEM-X2C, Руководство пользователя

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Chapter 6: 1-Gb Ethernet Switch Firmware
6-13 SNMP
The SNMP agent in the gigabit switch supports SNMP v1 and v2c. It also supports the
following MIB:
• RFC1213 MIBII with standard sets which include system, interfaces, IP, ICMP, TCP,
UDP, Dot3, and SNMP.
• RFC2011 SNMPv2 MIB for IP using SMIv2
• RFC2665 EtherLike MIB
Table 6-8. IGMP Snooping Screen Controls
Control Description
Robustness Variable
This allows tuning for the expected packet loss on a subnet. If a subnet is
expected to be lossy, the Robustness Variable may be increased. IGMP is robust
to (Robustness Variable-1) packet losses. The Robustness Variable must not be
0, and should not be 1. The default value is 2.
Query Interval
This is the interval between general queries sent by the querier. The default
interval is 125 seconds. By varying the [Query Interval], an administrator may
tune the number of IGMP messages on the subnet; larger values cause IGMP
queries to be sent less often.
Query Response
Interval
This is the maximum response time inserted into the periodic general queries.
The default value is 100 (10 seconds) By varying the query response interval, an
administrator can tune the bursting of IGMP messages on the subnet; larger
values make the traffic less bursty, as host responses are spread out over a
larger interval. The number of seconds represented by the query response
interval must be less than the query interval.
Last Member Query
Interval
This is the maximum response time inserted into group-specific queries sent in
response to Leave Group messages, and is also the amount of time between
group-specific query messages. The default value is 10 (1 second). This value
may be tuned to modify the “leave latency” of the network. A reduced value
results in reduced time to detect the loss of the last member of a group.
Last Member Query
Count This is the number of Group-Specific Queries sent before the router assumes
there are no local members.Default: the Robustness Variable.
Enable IGMP
Snooping Feature
This is used to enable the IGMP snooping feature.
Router Ports This specifies ports to which IGMP routers were connected.