User manual ALCATEL-LUCENT OMNISTACK 6300

[. . . ] B April 2004 OmniStack® 6300-24 Users Guide An Alcatel service agreement brings your company the assurance of 7x24 no-excuses technical support. You'll also receive regular software updates to maintain and maximize your Alcatel product's features and functionality and on-site hardware replacement through our global network of highly qualified service delivery partners. Additionally, with 24-hour-a-day access to Alcatel's Service and Support web page, you'll be able to view and update any case (open or closed) that you have reported to Alcatel's technical support, open a new case or access helpful release notes, technical bulletins, and manuals. For more information on Alcatel's Service Programs, see our web page at www. ind. alcatel. com, call us at 1-800-995-2696, or email us at support@ind. alcatel. com. This Manual documents OmniStack 6300-24 hardware and software. [. . . ] Command Usage · IGMP Snooping ­ This switch can passively snoop on IGMP Query and Report packets transferred between IP multicast routers/switches and IP multicast host groups to identify the IP multicast group members. It simply monitors the IGMP packets passing through it, picks out the group registration information, and configures the multicast filters accordingly. · IGMP Querier ­ A router, or multicast-enabled switch, can periodically ask their hosts if they want to receive multicast traffic. If there is more than one router/switch on the LAN performing IP multicasting, one of these devices is elected "querier" and assumes the role of querying the LAN for group members. It then propagates the service requests on to any upstream multicast switch/router to ensure that it will continue to receive the multicast service. Note: Multicast routers use this information, along with a multicast routing protocol such as DVMRP or PIM, to support IP multicasting across the Internet. Command Attributes · IGMP Status -- When enabled, the switch will monitor network traffic to determine which hosts want to receive multicast traffic. (Default: Enabled) · Act as IGMP Querier -- When enabled, the switch can serve as the Querier, which is responsible for asking hosts if they want to receive multicast traffic. (Default: Enabled) · IGMP Query Count -- Sets the maximum number of queries issued for which there has been no response before the switch takes action to drop a client from the multicast group. (Range: 2-10, Default: 2) · IGMP Query Interval -- Sets the frequency at which the switch sends IGMP host-query messages. (Range: 60-125 seconds, Default: 125) · IGMP Report Delay -- Sets the time between receiving an IGMP Report for an IP multicast address on a port before the switch sends an IGMP Query out of that port and removes the entry from its list. (Range: 5-30 seconds, Default: 10) · IGMP Query Timeout -- The time the switch waits after the previous querier stops before it considers the router port (i. e. , the interface which had been receiving query packets) to have expired. (Range: 300-500 seconds, Default: 300) · IGMP Version -- Sets the protocol version for compatibility with other devices on the network. Some attributes are only enabled for IGMPv2, including IGMP Report Delay and IGMP Query Timeout. 3-161 3 Configuring the Switch Web ­ Click IGMP Snooping, IGMP Configuration. IGMP Configuration CLI ­ This example modifies the settings for multicast filtering, and then displays the current status. Console(config)#ip igmp snooping Console(config)#ip igmp snooping querier Console(config)#ip igmp snooping query-count 10 Console(config)#ip igmp snooping query-interval 100 Console(config)#ip igmp snooping query-max-response-time 20 Console(config)#ip igmp snooping query-time-out 300 Console(config)#ip igmp snooping version 2 Console(config)#exit Console#show ip igmp snooping Service status : Enabled Querier status : Enabled Query count : 10 Query interval : 100 sec Query max response time : 20 sec Router port expire time: 300 sec IGMP snooping version : Version 2 Console# 4-218 4-222 4-222 4-223 4-224 4-224 4-220 4-220 Displaying Interfaces Attached to a Multicast Router Multicast routers that are attached to ports on the switch use information obtained from IGMP, along with a multicast routing protocol such as DVMRP or PIM, to support IP multicasting across the Internet. These routers may be dynamically discovered by the switch or statically assigned to an interface on the switch. You can use the Multicast Router Port Information page to display the ports on this switch attached to a neighboring multicast router/switch for each VLAN ID. Command Attributes · VLAN ID ­ ID of configured VLAN (1-4094). · Multicast Router List ­ Multicast routers dynamically discovered by this switch or those that are statically assigned to an interface on this switch. 3-162 Multicast Filtering 3 Web ­ Click IGMP Snooping, Multicast Router Port Information. Select the required VLAN ID from the scroll-down list to display the associated multicast routers. Figure 3-102. Multicast Router Port Information CLI ­ This example shows that Port 11 has been statically configured as a port attached to a multicast router. Console#show ip igmp snooping mrouter vlan 1 VLAN M'cast Router Port Type ---- ------------------ ------1 Eth 1/11 Static 4-226 Specifying Static Interfaces for a Multicast Router Depending on your network connections, IGMP snooping may not always be able to locate the IGMP querier. Therefore, if the IGMP querier is a known multicast router/ switch connected over the network to an interface (port or trunk) on your switch, you can manually configure the interface (and a specified VLAN) to join all the current multicast groups supported by the attached router. This can ensure that multicast traffic is passed to all the appropriate interfaces within the switch. [. . . ] Formerly called Group Address Registration Protocol. Generic Multicast Registration Protocol (GMRP) GMRP allows network devices to register end stations with multicast groups. GMRP requires that any participating network devices or end stations comply with the IEEE 802. 1p standard. Group Attribute Registration Protocol (GARP) See Generic Attribute Registration Protocol. IEEE 802. 1D Specifies a general method for the operation of MAC bridges, including the Spanning Tree Protocol. IEEE 802. 1Q VLAN Tagging--Defines Ethernet frame tags which carry VLAN information. It allows switches to assign endstations to different virtual LANs, and defines a standard way for VLANs to communicate across switched networks. IEEE 802. 1p An IEEE standard for providing quality of service (QoS) in Ethernet networks. The standard uses packet tags that define up to eight traffic classes and allows switches to transmit packets based on the tagged priority value. IEEE 802. 1s An IEEE standard for the Multiple Spanning Tree Protocol (MSTP) which provides independent spanning trees for VLAN groups. IEEE 802. 1x Port Authentication controls access to the switch ports by requiring users to first enter a user ID and password for authentication. IEEE 802. 3ac Defines frame extensions for VLAN tagging. Glossary-2 Glossary IEEE 802. 3x Defines Ethernet frame start/stop requests and timers used for flow control on full-duplex links. IGMP Snooping Listening to IGMP Query and IGMP Report packets transferred between IP Multicast Routers and IP Multicast host groups to identify IP Multicast group members. IGMP Query On each subnetwork, one IGMP-capable device will act as the querier -- that is, the device that asks all hosts to report on the IP multicast groups they wish to join or to which they already belong. [. . . ]