Since a big part of creating a positive user experience is your percentage of uptime and absence of slow response, packet loss, link overload etc, measuring how traffic spikes and fluctuations in user activity affect system performance and resources allocation is an important, and sometimes overlooked, function of IT operations.
#Multicast traffic generator software
Traffic packet generators are hardware or software tools that are concerned with the technical aspects of traffic and how it affects network and system resources.
![multicast traffic generator multicast traffic generator](https://www.cisco.com/c/dam/en/us/support/docs/ip/ip-multicast/10568-38a.gif)
Stress Testing a network or IT system with high volume of traffic will give us significant insights about the behavior of such systems in abnormal conditions such as DDoS attacks, sudden influx of traffic (e.g during backup transfers over the network) etc. For more information, see How IGMP operates.In the Networking and IT world we usually design and implement networks and server infrastructure taking for granted that the hardware and applications will withstand any volume of traffic. In most cases, HP recommends that you leave this parameter in the default enabled state even if you have a multicast router performing the querier function in your multicast group. When enabled (the default state), the switch’s querier function eliminates the need for a multicast router. When the switch has an IP address on a given VLAN, the switch automatically operates as a querier for that VLAN if it does not detect a multicast router or another switch functioning as a querier. This device tracks which ports are connected to devices (IGMP clients) that belong to specific multicast groups and triggers updates of this information.Ī querier uses data received from the queries to determine whether to forward or block multicast traffic on specific ports. Querier: A required IGMP device that facilitates IGMP protocol and traffic flow on a given LAN. IGMP host: An end-node device running an IGMP (multipoint or multicast communication) application.
![multicast traffic generator multicast traffic generator](https://docs.vmware.com/en/VMware-NSX-Data-Center-for-vSphere/6.4/com.vmware.nsx.admin.doc/images/GUID-AFA1A23B-DA9A-4569-87A3-345FCECA43E6-high.png)
IGMP device: A switch or router running IGMP traffic control features.
![multicast traffic generator multicast traffic generator](https://stringfixer.com/files/183103004.jpg)
To disable the querier feature, use the IGMP configuration MIB (see “Configuring the querier function”). If no other querier is detected, the switch then also functions as the querier. If multiple VLANs are configured, you can configure IGMP by VLAN.Įnabling IGMP allows detection of IGMP queries and report packets to manage IP multicast traffic through the switch. Switches in the network that support IGMP can then be configured to direct the multicast traffic to only the ports where needed. In such multipoint applications, IGMP is configured on the hosts and multicast traffic is generated by one or more servers (inside or outside the local network). IGMP is useful in multimedia applications such as LAN TV, desktop conferencing and collaborative computing that have multipoint communication (communication from one-to-many or many-to-many hosts). With IGMP, ports can detect IGMP queries, report packets and manage IP switch multicast traffic. This can cause significant and unnecessary bandwidth use in networks employing IP multicast traffic. In the factory default state (IGMP disabled), the switch floods all IP multicast traffic it receives on a given VLAN through all ports on that VLAN, except the port on which it received the traffic.
![multicast traffic generator multicast traffic generator](https://image.slidesharecdn.com/iecon2011multicasttrafficfilteringforsampledvalueprocessbusnetworks-180625101528/85/multicast-traffic-filtering-for-sampled-value-process-bus-networks-3-320.jpg)
In a network where IP multicast traffic is transmitted for multimedia applications, you can use a switch to reduce unnecessary per-port bandwidth usage by configuring IGMP (Internet Group Management Protocol) controls. NOTE: Multicast filtering is not supported on HP switches J9779A, J9780A, J9782A and J9783A.