ADDER ALIF2000 Guide de l'utilisateur télécharger pdf (Page 4)

Implementing IGMP snooping on a low end switch with a slow processor can

cause severe performance problems when data is transmitted at high data rates

and/or there are multiple IGMP groups to be monitored. If a switch cannot keep

pace, it will cause backlogs where large numbers of data packets are arbitrarily

discarded and/or it resorts to sending all multicasts to all ports - causing multicast

ooding. Either way, this results in slow video updates and a poor user experience.

A quick note about Layer 3 switches and mulcast roung

A key component of subnets used for multicast distribution is the multicast

router. This device plays a vital coordinating role in ensuring that network trafc

is delivered to the correct Layer 2 switches and the hosts connected to them.

Increasingly, the role of router is being fullled by Layer 3 switches, particularly

for private networks that do not require links to wider external networks. When

selecting a Layer 3 switch for your network, ensure that it can operate as an

IGMP Querier and also has sufcient capacity for the size of your subnet.

Specic switches known to work well with AdderLink Innity

The following models have been tested and found to produce favourable results:

Layer 2 switches

• Cisco 2960

• Cisco 3750

• Cisco 4500

• Cisco 6500

• Extreme Networks X480

• HP Procurve 2810

• HP Procurve 2910

• H3C 5120

Layer 3 switch

• HuaWei Quidway s5328c-EI

For specic details on conguring each of these switches for efcient operation

with AdderLink Innity, please refer to the Switch setups section.

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ADDER ALIF2000 Guide de l'utilisateur Page 4