Allied Telesis 4000 Series manual Igmp Snooping Query Solicitation CR00013351

Page 19

Software Version sb275a05

19

IGMP Snooping Query Solicitation (CR00013351)

Query solicitation minimises loss of multicast data after a topology change on networks that use EPSR or spanning tree (STP, RSTP, or MSTP) for loop protection and IGMP snooping.

When IGMP snooping is enabled on a VLAN, and EPSR or Spanning Tree (STP, RSTP, or MSTP) changes the underlying link layer topology of that VLAN, this can interrupt multicast data flow for a significant length of time. Query solicitation prevents this by monitoring the VLAN for any topology changes. When it detects a change, it generates a special IGMP Leave message known as a Query Solicit, and floods the Query Solicit message to all ports. When the IGMP Querier receives the message, it responds by sending a General Query. This refreshes snooped group membership information in the network.

Query solicitation functions by default (without you enabling it) on the root bridge in an STP topology and the master node in an EPSR topology. By default, the root bridge or master node always sends a Query Solicit message when the topology changes.

On other switches in the network, the query solicitation is disabled by default, but you can enable it by using the command:

set igmpsnooping vlan={vlan-name1..4094all} querysolicit={onyestrue}

If you enable query solicitation on a switch other than the STP root bridge or EPSR master node, both that switch and the root or master send a Query Solicit message.

Once the Querier receives the Query Solicit message, it sends out a General Query and waits for responses, which update the snooping information throughout the network. If necessary, you can reduce the time this takes by tuning the IGMP timers, especially the queryresponseinterval parameter. For more information, see the “IGMP Timers and Counters” section of “How To Configure IGMP on Allied Telesyn Routers and Switches for Multicasting”. This How To Note is available from www.alliedtelesyn.co.uk/en-gb/ solutions/techdocs.asp?area=howto

Disabling Query Solicitation and Display Settings

On any switch, you can disable query solicitation by using the command:

set igmpsnooping vlan={vlan-name1..4094all} querysolicit={offnofalse}

To see whether query solicitation is on or off, use the command:

show igmpsnooping

Check the new Query Solicitation field, as shown in the following figure.

Version sb275a05 C613-10464-00 Rev H

Page 18 Page 20
Image 19
Page 18 Page 20
Contents GUI Resource File Name IntroductionCompressed Release File Name Compressed Release File SizeEnabling and installing this Release Enabling and installing this ReleaseGUI Features in sb275a05Software Version sb275a05 Module Level DescriptionInto it, excessive CPU usage occurred Switch table=ipThis issue has been resolved AsynCR00014222 CR00013351Igmp SnoopingFeatures in sb275a04Software Maintenance Release Note Features in sb275a04Ranges RebootSoftware Version sb275a05 Module Active range’s address and maskLogging Features in sb275a04Log PingTTY CR00013334 CR00012774CR00012946 CR00013332CR00013349 Features in sb275a03CR00013444 Features in sb275a02 CR00012961 Switch, VlanCR00012726 CR00012782Appletalk Features in sb275a02File, Install AlarmCPU Utilisation CR00012616 on SwitchSoftware Version sb275a05 Module Level Description Alternative routePIM4 Features in sb275a01Environment AuthenticationMonitoring Which loop=bcc was enabled Features in sb275a01Show config dynam=trigger 09 102705 3 Swcx SWI Silic Soft reset on PortIgmp Snooping Query Solicitation CR00013351 Disabling Query Solicitation and Display SettingsIgmp Snooping Query Solicitation CR00013351 Changes to Igmp Snooping Fast Leave Command SyntaxExtended Monitoring of CPU Utilisation CR00012616 Brackets Start percent Are also in brackets Current InstallBefore the switch stops capturing extended CPU Extended Monitoring of CPU Utilisation CR00012616

4000 Series specifications

The Allied Telesis 4000 Series is designed to meet the growing demands for reliable and scalable networking solutions in enterprise environments. This series offers a range of stackable, Layer 2 and Layer 3 Ethernet switches, combining advanced features with robust performance to ensure seamless connectivity and superior network management.

One of the standout features of the Allied Telesis 4000 Series is its versatile stacking capability. The switches can be stacked together, enabling them to function as a single unit. This simplifies network management and provides enhanced redundancy, allowing for easy scaling without disrupting operations. The stacking technology supports high-speed interconnections, ensuring that data transfer between switches remains efficient and reliable.

The 4000 Series is equipped with advanced Layer 2 and Layer 3 switching functionalities. This dual-layer capability allows for both basic data linking and more complex routing operations, providing a flexible solution for organizations with diverse networking needs. With support for VLAN segmentation, organizations can optimize their bandwidth usage and enhance security by isolating network traffic.

Security is a crucial aspect of the Allied Telesis 4000 Series. Features such as IEEE 802.1X port-based access control, dynamic VLAN assignment, and advanced access control lists (ACLs) ensure that unauthorized access is prevented. The switches also support secure management protocols, providing peace of mind for network administrators who need to maintain compliance with industry regulations.

The Allied Telesis 4000 Series integrates Power over Ethernet (PoE) technology, enabling the switches to supply power to connected devices, such as IP cameras and VoIP phones, directly through the Ethernet cable. This eliminates the need for separate power supplies, simplifying installation and reducing clutter, particularly in environments where space is at a premium.

For performance, the 4000 Series boasts high throughput and low latency, making it suitable for bandwidth-intensive applications. The switches come equipped with advanced Quality of Service (QoS) features, allowing network administrators to prioritize critical traffic and ensure that applications perform optimally, even during peak usage times.

In conclusion, the Allied Telesis 4000 Series offers a comprehensive solution for organizations seeking reliable, secure, and scalable networking equipment. With its advanced stacking capabilities, dual-layer functionality, robust security features, and PoE support, this series is well-suited for modern enterprise networking demands. Whether for a small office or a larger data center, the Allied Telesis 4000 Series delivers the performance and flexibility required in today’s dynamic networking environments.
Top Page Image Contents