04-27-2006 04:48 AM - edited 03-03-2019 02:58 AM
Is is a good idea to enable VLAN pruning on switch stacks or does this add to more CPU usage which could cause other problems. The network consists of 3750,3500 and 2900 switches.
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04-27-2006 05:18 AM
Hi,
Pruning unneeded vlans off of trunks is a good idea, and may actually lower your CPU utilization, as the number of STP instances may be reduced as well.
From the best practices doc:
http://www.cisco.com/en/US/products/hw/switches/ps700/products_white_paper09186a00801b49a4.shtml
"VLANs can be pruned from trunks down to switches that do not have ports in the VLAN. This results in frame flooding that is more bandwidth-efficient. Manual pruning also has a reduced spanning-tree diameter. A per-switch VLAN configuration also encourages this practice."
HTH,
Bobby
*Please rate helpful posts.
04-27-2006 05:18 AM
Hi,
Pruning unneeded vlans off of trunks is a good idea, and may actually lower your CPU utilization, as the number of STP instances may be reduced as well.
From the best practices doc:
http://www.cisco.com/en/US/products/hw/switches/ps700/products_white_paper09186a00801b49a4.shtml
"VLANs can be pruned from trunks down to switches that do not have ports in the VLAN. This results in frame flooding that is more bandwidth-efficient. Manual pruning also has a reduced spanning-tree diameter. A per-switch VLAN configuration also encourages this practice."
HTH,
Bobby
*Please rate helpful posts.
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