Resolution
There are no restrictions regarding the number of trunks in a Catalyst 6500 Switch. It all depends on the amount of traffic the VLANs carry. As a best practice, to avoid congestion due to broadcast or multicast, it is suggested that you enable VLAN Trunking Protocol (VTP) pruning in order to reduce the VLAN traffic on the trunks.
VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic, such as broadcast, multicast, unknown, and flooded unicast packets. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. By default, VTP pruning is disabled.
For VTP pruning to be effective, all devices in the management domain must support VTP pruning. On devices that do not support VTP pruning, you must manually configure the VLANs allowed on trunks.
For more information, refer to the Understanding VTP Pruning section of Configuring VLAN Trunking Protocol (VTP).
Device connected to switch
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