Enmiendas a la NIC 16 Y NIC 41 49 

Object Description

• Router Port Specify which ports act as IGMP router ports. A router port is a port on the Ethernet switch that leads towards the Layer 3 multicast device or IGMP querier. The Switch forwards IGMP join or leave packets to an IGMP router port.

„ Auto:

Select “Auto” to have the Managed Switch automatically uses the port as IGMP Router port if the port receives IGMP query packets.

„ Static:

The Managed Switch always uses the specified port as an IGMP Router port. Use this mode when you connect an IGMP multicast server or IP camera which applied with multicast protocol to the port.

„ None:

The Managed Switch will not use the specified port as an IGMP Router port. The Managed Switch will not keep any record of an IGMP router being connected to this port. Use this mode when you connect other IGMP multicast servers directly on the non-querier Managed Switch and don’t want the multicast stream be flood to uplink switch throught the port that connected to the IGMP querier.

• Fast Leave Enable the Fast Leave on the port.

• Throttling Enable to limit the number of multicast groups to which a switch port can belong.

Buttons

: Click to save changes.

: Click to undo any changes made locally and revert to previously saved values.

If an aggregation member port is selected as a router port, the whole aggregation will act as a router port.

4.8.4 VLAN Configuration

Each page shows up to 999 entries from the VLAN table, default being 20, selected through the "entries per page" input field. When first visited, the web page will show the first 20 entries from the beginning of the VLAN Table. The first displayed will be the one with the lowest VLAN ID found in the VLAN Table.

The "VLAN" input fields allow the user to select the starting point in the VLAN Table. The IGMP Snooping VLAN Configuration screen is shown Figure 4-8-7.

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Figure 4-8-7 IGMP Snooping VLAN Configuration page screenshot The page includes the following fields:

Object Description

• VLAN ID The VLAN ID of the entry.

• IGMP Snooping Enable Enable the per-VLAN IGMP Snooping. Only up to 64 VLANs can be selected. • IGMP Querier Enable the IGMP Querier in the VLAN. The Querier will send out if no Querier received in 255 seconds after IGMP Querier Enabled. Each Querier's interval is 125 second, and it will stop act as an IGMP Querier if received any Querier from other devices.

Buttons

: Refreshes the displayed table starting from the "VLAN" input fields.

: Updates the table starting from the first entry in the VLAN Table, i.e. the entry with the lowest VLAN ID. : Updates the table, starting with the entry after the last entry currently displayed.

: Click to save changes.

: Click to undo any changes made locally and revert to previously saved values.

4.8.5 Port Group Filtering

In certain switch applications, the administrator may want to control the multicast services that are available to end users. For example, an IP/TV service based on a specific subscription plan. The IGMP filtering feature fulfills this requirement by restricting access to specified multicast services on a switch port, and IGMP throttling limits the number of simultaneous multicast groups a port can join.

IGMP filtering enables you to assign a profile to a switch port that specifies multicast groups that are permitted or denied on the port. An IGMP filter profile can contain one or more, or a range of multicast addresses; but only one profile can be assigned to a port. When enabled, IGMP join reports received on the port are checked against the filter profile. If a requested multicast group is permitted, the IGMP join report is forwarded as normal. If a requested multicast group is denied, the IGMP join report is dropped. IGMP throttling sets a maximum number of multicast groups that a port can join at the same time. When the maximum number of groups is reached on a port, the switch can take one of two actions; either “deny” or “replace”. If the action is set to deny, any new IGMP join reports will be dropped. If the action is set to replace, the switch randomly removes an existing group and replaces it with the new multicast group. The IGMP Snooping Port Group Filtering Configuration screen is shown Figure 4-8-8.

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Figure 4-8-8 IGMP Snooping Port Group Filtering Configuration page screenshot The page includes the following fields:

Object Description

• Delete Check to delete the entry. It will be deleted during the next save. • Port The logical port for the settings.

• Filtering Group The IP Multicast Group that will be filtered.

Buttons

: Check to delete the entry.

: Click to add a new entry to the Group Filtering table. : Click to save changes.

: Click to undo any changes made locally and revert to previously saved values.

4.8.6 IGMP Snooping Status

This page provides IGMP Snooping status.

The status relate to the currently selected stack unit, as reflected by the page header. The IGMP Snooping Status screen is shown Figure 4-8-9.

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Figure 4-8-9 IGMP Snooping Status page screenshot The page includes the following fields:

Object Description

• VLAN ID The VLAN ID of the entry.

• Groups The present IGMP groups. Max. are 128 groups for each VLAN. • Port Members The ports that are members of the entry.

• Querier Status Show the Querier status is "ACTIVE" or "IDLE". • Querier Transmit The number of Transmitted Querier.

• Querier Receive The number of Received Querier. • V1 Reports Receive The number of Received V1 Reports. • V2 Reports Receive The number of Received V2 Reports. • V3 Reports Receive The number of Received V3 Reports. • V2 Leave Receive The number of Received V2 Leave.

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