Cisco Sg3008 Manual
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Multicast Adding MAC Group Address 256 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 16 Entries that were created both in this page and in the IP Multicast Group Address page are displayed. For those created in the IP Multicast Group Address page, the IP addresses are converted to MAC addresses. STEP 4Click Add to add a static MAC Group Address. STEP 5Enter the parameters. •VLAN ID—Defines the VLAN ID of the new Multicast group. •MAC Group Address—Defines the MAC address of the new Multicast group. STEP 6Click Apply, the MAC Multicast group is saved to the Running Configuration file. To configure and display the registration for the interfaces within the group, select an address, and click Details. The page contains: •VLAN ID—The VLAN ID of the Multicast group. •MAC Group Address—The MAC address of the group. STEP 7Select the port or LAG to be displayed from the Filter: Inter face Type menu. STEP 8Click Go to display the port or LAG membership. STEP 9Select the way that each interface is associated with the Multicast group: •Static—Attaches the interface to the Multicast group as a static member. •Dynamic—Indicates that the interface was added to the Multicast group as a result of IGMP/MLD snooping. •Forbidden—Specifies that this port is not allowed to join this group on this VLAN. •None—Specifies that the port is not currently a member of this Multicast group on this VLAN. STEP 10Click Apply, and the Running Configuration file is updated. NOTEEntries that were created in the IP Multicast Group Address page cannot be deleted in this page (even if they are selected).
Multicast Adding IP Multicast Group Addresses Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 257 16 Adding IP Multicast Group Addresses The IP Multicast Group Address page is similar to the MAC Group Address page except that Multicast groups are identified by IP addresses. The IP Multicast Group Address page enables querying and adding IP Multicast groups. To define and view IP Multicast groups: STEP 1Click Multicast > IP Multicast Group Address. The page contains all of the IP Multicast group addresses learned by snooping. STEP 2Enter the parameters required for filtering. •VLAN ID equals to—Define the VLAN ID of the group to be displayed. •IP Version equals to—Select IPv6 or IPv4. •IP Multicast Group Address equals to—Define the IP address of the Multicast group to be displayed. This is only relevant when the Forwarding mode is (S,G). •Source IP Address equals to—Define the source IP address of the sending device. If mode is (S,G), enter the sender S. This together with the IP Group Address is the Multicast group ID (S,G) to be displayed. If mode is (*.G), enter an * to indicate that the Multicast group is only defined by destination. STEP 3Click Go. The results are displayed in the lower block. When Bonjour and IGMP are enabled on the device in Layer 2 system mode, the IP Multicast address of Bonjour appears. Click Go. The results are displayed in the lower block. STEP 4Click Add to add a static IP Multicast Group Address. STEP 5Enter the parameters. •VLAN ID—Defines the VLAN ID of the group to be added. •IP Version—Select the IP address type. •IP Multicast Group Address—Define the IP address of the new Multicast group. •Source Specific—Indicates that the entry contains a specific source, and adds the address in the IP Source Address field. If not, the entry is added as a (*,G) entry, an IP group address from any IP source.
Multicast Configuring IGMP Snooping 258 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 16 •Source IP Address—Defines the source address to be included. STEP 6Click Apply. The IP Multicast group is added, and the device is updated. STEP 7To configure and display the registration of an IP group address, select an address and click Details. The VLAN ID, IP Version, IP Multicast Group Address, and Source IP Address selected are displayed as read-only in the top of the window. You can select the filter type: •Interface Type equals to—Select whether to display ports or LAGs. STEP 8For each interface, select its association type. The options are as follows: •Static—Attaches the interface to the Multicast group as a static member. •Forbidden—Specifies that this port is forbidden from joining this group on this VLAN. •None—Indicates that the port is not currently a member of this Multicast group on this VLAN. This is selected by default until Static or Forbidden is selected. STEP 9Click Apply. The Running Configuration file is updated. Configuring IGMP Snooping To support selective Multicast forwarding (IPv4), Bridge Multicast filtering must be enabled (in the Properties page), and IGMP Snooping must be enabled globally and for each relevant VLAN (in the IGMP Snooping page). By default, a Layer 2 device forwards Multicast frames to all ports of the relevant VLAN, essentially treating the frame as if it were a Broadcast. With IGMP Snooping the device forwards Multicast frames to ports that have registered Multicast clients. NOTEThe device supports IGMP Snooping only on static VLANs. It does not support IGMP Snooping on dynamic VLANs.
Multicast Configuring IGMP Snooping Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 259 16 When IGMP Snooping is enabled globally or on a VLAN, all IGMP packets are forwarded to the CPU. The CPU analyzes the incoming packets, and determines the following: •Which ports are asking to join which Multicast groups on what VLAN. •Which ports are connected to Multicast routers (Mrouters) that are generating IGMP queries. •Which ports are receiving PIM, DVMRP, or IGMP query protocols. These are displayed on the IGMP Snooping page. Ports, asking to join a specific Multicast group, issue an IGMP report that specifies which group(s) the host wants to join. This results in the creation of a forwarding entry in the Multicast Forwarding Data Base. The IGMP Snooping Querier is used to support a Layer 2 Multicast domain of snooping switches in the absence of a Multicast router. For example, where Multicast content is provided by a local server, but the router (if one exists) on that network does not support Multicast. The speed of IGMP Querier activity must be aligned with the IGMP-snooping- enabled switches. Queries must be sent at a rate that is aligned to the snooping table aging time. If queries are sent at a rate lower than the aging time, the subscriber cannot receive the Multicast packets. This is performed in the IGMP Snooping Edit page. To enable IGMP Snooping and identify the device as an IGMP Snooping Querier on a VLAN: STEP 1Click Multicast > IGMP Snooping. STEP 2Enable or disable the IGMP Snooping status. When IGMP Snooping is enabled globally, the device monitoring network traffic can determine which hosts have requested to receive Multicast traffic. The device only performs IGMP Snooping if both IGMP snooping and Bridge Multicast filtering are enabled. STEP 3Select a VLAN, and click Edit.
Multicast Configuring IGMP Snooping 260 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 16 There can be only one IGMP Querier in a network. The device supports standards-based IGMP Querier election. Some of the values of the operational parameters of this table are sent by the elected querier. The other values are derived from the device. STEP 4Enter the parameters. •VLAN ID—Select the VLAN ID on which IGMP snooping is defined. •IGMP Snooping Status—Enable or disable the monitoring of network traffic for the s ele cte d VL AN. •Operational IGMP Snooping Status—Displays the current status of the IGMP Snooping for the selected VLAN. •MRouter Ports Auto Learn—Enable or disable auto learning of the ports to which the Mrouter is connected. •Query Robustness—Enter the Robustness Variable value to be used if this device is the elected querier. •Operational Query Robustness—Displays the robustness variable sent by the elected querier. •Query Interval—Enter the interval between the General Queries to be used if this device is the elected querier. •Operational Query Interval—The time interval in seconds between General Queries sent by the elected querier. •Query Max Response Interval—Enter the delay used to calculate the Maximum Response Code inserted into the periodic General Queries. •Operational Query Max Response Interval—Displays the Query Max Response Interval included in the General Queries sent by the elected querier. •Last Member Query Counter—Enter the number of IGMP Group-Specific Queries sent before the device assumes there are no more members for the group, if the device is the elected querier. •Operational Last Member Query Counter—Displays the operational value of the Last Member Query Counter. •Last Member Query Interval—Enter the Maximum Response Delay to be used if the device cannot read Max Response Time value from group- specific queries sent by the elected querier.
Multicast MLD Snooping Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 261 16 •Operational Last Member Query Interval—Displays the Last Member Query Interval sent by the elected querier. •Immediate Leave—Enable Immediate Leave to decrease the time it takes to block a Multicast stream sent to a member port when an IGMP Group Leave message is received on that port. •IGMP Querier Status—Enable or disable the IGMP Querier. •Administrative Querier Source IP Address—Select the source IP address of the IGMP Querier. This can be the IP address of the VLAN or it can be the management IP address. •Operational Querier Source IP Address—Displays the source IP address of the elected querier. •IGMP Querier Version—Select the IGMP version used if the device becomes the elected querier. Select IGMPv3 if there are switches and/or Multicast routers in the VLAN that perform source-specific IP Multicast for warding. STEP 5Click Apply. The Running Configuration file is updated. MLD Snooping Hosts use the MLD protocol to report their participation in Multicast sessions, and the device uses MLD snooping to build Multicast membership lists. It uses these lists to forward Multicast packets only to device ports where there are host nodes that are members of the Multicast groups. The device does not support MLD Querier. Hosts use the MLD protocol to report their participation in Multicast sessions. The device supports two versions of MLD snooping: •MLDv1 snooping detects MLDv1 control packets, and sets up traffic bridging, based on IPv6 destination Multicast addresses. •MLDv2 snooping uses MLDv2 control packets to forward traffic based on the source IPv6 address, and the destination IPv6 Multicast address. The actual MLD version is selected by the Multicast router in the network.
Multicast MLD Snooping 262 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 16 In an approach similar to IGMP snooping, MLD frames are snooped as they are forwarded by the device from stations to an upstream Multicast router and vice versa. This facility enables a device to conclude the following: •On which ports stations interested in joining a specific Multicast group are located •On which ports Multicast routers sending Multicast frames are located This knowledge is used to exclude irrelevant ports (ports on which no stations have registered to receive a specific Multicast group) from the forwarding set of an incoming Multicast frame. If you enable MLD snooping in addition to the manually-configured Multicast groups, the result is a union of the Multicast groups and port memberships derived from the manual setup and the dynamic discovery by MLD snooping. Only static definitions are preserved when the system is rebooted. To enable MLD Snooping and configure it on a VLAN: STEP 1Click Multicast > MLD Snooping. STEP 2Enable or disable MLD Snooping Status. When MLD Snooping is globally enabled, the device monitoring network traffic can determine which hosts have requested to receive Multicast traffic. The device performs MLD Snooping only if both MLD snooping and Bridge Multicast filtering are enabled. STEP 3Select a VLAN, and click Edit. STEP 4Enter the parameters. •VLAN ID—Select the VLAN ID. •MLD Snooping Status—Enable or disable MLD snooping on the VLAN. The device monitors network traffic to determine which hosts have asked to be sent Multicast traffic. The device performs MLD snooping only when MLD snooping and Bridge Multicast filtering are both enabled •Operational MLD Snooping Status—Displays the current status of MLD Snooping for the selected VLAN. •MRouter Ports Auto-Learn—Enable or disable Auto Learn for the Multicast router. •Query Robustness—Enter the Robustness Variable value to be used if the device cannot read this value from messages sent by the elected querier.
Multicast Querying IGMP/MLD IP Multicast Group Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 263 16 •Operational Query Robustness—Displays the robustness variable sent by the elected querier. •Query Interval—Enter the Query Interval value to be used by the device if the device cannot derive the value from the messages sent by the elected querier. •Operational Query Interval—The time interval in seconds between General Queries received from the elected querier. •Query Max Response Interval—Enter Query Max Response delay to be used if the device cannot read the Max Response Time value from General Queries sent by the elected querier. •Operational Query Max Response Interval—Displays the delay used to calculate the Maximum Response Code inserted into the General Queries. •Last Member Query Counter—Enter the Last Member Query Count to be used if the device cannot derive the value from the messages sent by the elected querier. •Operational Last Member Query Counter—Displays the operational value of the Last Member Query Counter. •Last Member Query Interval—Enter the Maximum Response Delay to be used if the device cannot read Max Response Time value from Group- Specific queries sent by the elected querier. •Operational Last Member Query Interval—The Last Member Query Interval sent by the elected querier. •Immediate Leave—When enabled, reduces the time it takes to block unnecessary MLD traffic sent to a device port. STEP 5Click Apply. The Running Configuration file is updated. Querying IGMP/MLD IP Multicast Group The IGMP/MLD IP Multicast Group page displays the IPv4 and IPv6 group address learned from IGMP/MLD messages.
Multicast Defining Multicast Router Ports 264 Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 16 There might be a difference between information on this page and, for example, information displayed in the MAC Group Address page . Assuming that the system is in MAC-based groups and a port that requested to join the following Multicast groups 224.1.1.1 and 225.1.1.1, both are mapped to the same MAC Multicast address 01:00:5e:01:01:01. In this case, there is a single entry in the MAC Multicast page, but two entries on this page. To query for a IP Multicast group: STEP 1Click Multicast > IGMP/MLD IP Multicast Group. STEP 2Set the type of snooping group for which to search: IGMP or MLD. STEP 3Enter some or all of following query filter criteria: •Group Address equals to—Defines the Multicast group MAC address or IP address to query. •Source Address equals to—Defines the sender address to query. •VLAN ID equals to—Defines the VLAN ID to query. STEP 4Click Go. The following fields are displayed for each Multicast group: •VLAN—The VLAN ID. •Group Address—The Multicast group MAC address or IP address. •Source Address—The sender address for all of the specified group ports. •Included Ports—The list of destination ports for the Multicast stream. •Excluded Ports—The list of ports not included in the group. •Compatibility Mode—The oldest IGMP/MLD version of registration from the hosts the device receives on the IP group address. Defining Multicast Router Ports A Multicast router (Mrouter) port is a port that connects to a Multicast router. The device includes the Multicast router port(s) numbers when it forwards the Multicast streams and IGMP/MLD registration messages. This is required so that the Multicast routers can, in turn, forward the Multicast streams and propagate the registration messages to other subnets.
Multicast Defining Forward All Multicast Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version) 265 16 To statically configure or see dynamically-detected ports connected to the Multicast router: STEP 1Click Multicast > Multicast Router Port. STEP 2Enter some or all of following query filter criteria: •VLAN ID equals to—Select the VLAN ID for the router ports that are described. •IP Version equals to—Select the IP version that the Multicast router supports. •Interface Type equals to—Select whether to display ports or LAGs. STEP 3Click Go. The interfaces matching the query criteria are displayed. STEP 4For each port or LAG, select its association type. The options are as follows: •Static—The port is statically configured as a Multicast router port. •Dynamic—(Display only) The port is dynamically configured as a Multicast router port by a MLD/IGMP query. To enable the dynamic learning of Multicast router ports, go to the Multicast > IGMP Snooping page, and the Multicast > MLD Snooping page •Forbidden—This port is not to be configured as a Multicast router port, even if IGMP or MLD queries are received on this port. If Forbidden is enabled on a port, Mrouter is not learned on this port (i.e. MRouter Ports Auto-Learn is not enabled on this port). •None—The port is not currently a Multicast router port. STEP 5Click Apply to update the device. Defining Forward All Multicast The Forward All page enables and displays the configuration of the ports and/or LAGs that are to receive Multicast streams from a specific VLAN. This feature requires that Bridge Multicast filtering in the Properties page be enabled. If it is disabled, then all Multicast traffic is flooded to ports in the device. You can statically (manually) configure a port to Forward All, if the devices connecting to the port do not support IGMP and/or MLD.