| OID symbolic | OID numeric | Type | Access | Description |
|---|
| a3Com | 1.3.6.1.4.1.43 | | | |
| generic | 1.3.6.1.4.1.43.10 | | | |
| igmpMib | 1.3.6.1.4.1.43.10.37 | | | |
| igmpSnoop | 1.3.6.1.4.1.43.10.37.1 | | | |
| T/F igmpSnoopEnabled | 1.3.6.1.4.1.43.10.37.1.1 | TruthValue | read-write | Enables/disables IGMP Snooping on this device. It is set stack-wide.
The defaule value is True. The range is True(1) or False(2). |
| INT igmpSnoopRobustness | 1.3.6.1.4.1.43.10.37.1.2 | INTEGER | read-write | This enables IGMP tuning on a lossy network if a switch is the
querier. On such a network it may be increased. It is set stack-wide.
The default value is 1. The range is 1 to 2.
There could be a Low(1) or High(2) setting.
It is used to derive a timeout interval. If no IGMP v2 queries
are heard on this VLAN within this timeout interval, the local
switch will take over the querier role in the VLAN, assuming the
switch has no router ports:
Other Switch Querier Present Interval =
(Robustness x General Query Interval) +
1/2(General Max Query-Response Interval) = 65 seconds by default
The Robustness is also used to derive another interval. The amount
of time that must pass before the querying switch decides that there
are no more hosts listening to a particular multicast in seconds:
Group Membership Interval =
(Robustness x General Query Interval) +
General Max Query-Response Interval = 70 seconds by default. |
| T/F igmpSnoopLeaveEnabled | 1.3.6.1.4.1.43.10.37.1.3 | TruthValue | read-write | Enables/disables the processing of IGMP v2 leave messages stack-wide.
The default value is True(1). The range is True(1) or False(2). |
| INT igmpSnoopQueryTimeout | 1.3.6.1.4.1.43.10.37.1.4 | INTEGER | read-write | The frequency at which IGMP general query packets are
transmitted on this VLAN by the querying switch in seconds.
So this is the time between general periodic queries being
sent out of the switch when it is acting as the IGMP querier.
Large values lead to IGMP queries being sent less often.
It is set stack-wide.
The default is 125 seconds and the range is 60 to 125 seconds.
There could be 2 settings apart from the default.
Slow Query (100 secs) and Very Slow Query (125 secs). |
| INT igmpSnoopQueryMaxResponseTime | 1.3.6.1.4.1.43.10.37.1.5 | INTEGER | read-write | The maximum query response time in seconds advertised in IGMP v2
queries on this VLAN if the switch is the querier. Smaller values
allow a switch to prune groups faster. So it is the maximum response
time inserted into the general periodic queries. This variable
enables the tuning of the burstiness of the IGMP traffic.
If it is increased the responses have a larger time span in which
to be generated by the hosts. It is set stack-wide.
The default is 10 seconds and the range is 10 to 100 seconds.
There could be 2 settings apart from the default.
Slow Response (50 secs) and Very Slow Response (100 secs). |
| INT igmpSnoopLastMemberQueryTimeout | 1.3.6.1.4.1.43.10.37.1.6 | INTEGER | read-write | A timeout interval in seconds. Maximum response time inserted
into the IGMP group specific queries sent in response to an
IGMP Leave by a querying switch. It is also the time between
IGMP group specific queries being sent. It is set stack-wide.
The default is 1 second and the range is 1 to 5 seconds.
There could be 2 settings apart from the default.
Slow Response (3 secs) and Very Slow Response (5 secs). |
| INT igmpSnoopLastMemberQueryCount | 1.3.6.1.4.1.43.10.37.1.7 | INTEGER | read-write | The number of group specific queries sent before the querying switch
decides that there are no more hosts listening to a particular group
multicast address. It is set stack-wide.
The default is 2 and the range is 2 to 5. There could be 2 settings
apart from the default. Low count (3) and High count (5). |
| INT igmpSnoopRouterPortRefreshTimeout | 1.3.6.1.4.1.43.10.37.1.8 | INTEGER | read-write | A timeout interval in seconds. The maximum time that
should elapse between multicast
router protocol PDUs on a port in the VLAN.
The default is 100 seconds and the range is from 70 to 100 seconds.
There could be 2 settings apart from the default.
Slow Refresh (85 secs) and Very Slow Refresh (100 secs). |
| igmpSnoopVLANTable | 1.3.6.1.4.1.43.10.37.1.9 | | not-accessible | The (conceptual) table listing the VLANs on which IGMP
Snooping is enabled. |
| igmpSnoopVLANEntry | 1.3.6.1.4.1.43.10.37.1.9.1 | | not-accessible | An entry (conceptual row) representing a VLAN on
which IGMP Snooping is enabled. |
| CTR igmpSnoopVLANJoins | 1.3.6.1.4.1.43.10.37.1.9.1.1 | Counter | read-only | The number of times a group membership has been added on
this VLAN; i.e. the number of times an entry for
this VLAN has been added to the IGMP Snooping VLAN Table. This
object gives an indication of the amount of IGMP activity
over time. So this is the count of IGMP Reports received
over time on a VLAN. |
| CTR igmpSnoopVLANLeaves | 1.3.6.1.4.1.43.10.37.1.9.1.2 | Counter | read-only | The number of times a group membership has been removed
from this VLAN; i.e. the number of times an entry
for this VLAN has been deleted from the IGMP Snooping VLAN Table.
The difference between this and igmpSnoopVLANJoins indicates
the number of hosts listening to multicasts. The count of IGMP Leaves
received over time on a VLAN. |
| T/F igmpQueryEnabled | 1.3.6.1.4.1.43.10.37.1.10 | TruthValue | read-write | Enabled/Disables IGMP Queries for this device.
The default value is True. The range is True(1) or False(2). |
| IP igmpQueryIpAddress | 1.3.6.1.4.1.43.10.37.1.11 | IpAddress | read-write | This is the IP address used in IGMP Queries. The default value
is the management IP address. Since the root query device is
determined by the lowest IP address, you can vary this value
to increase or decrease the priority of the device. |
