Cisco Systems 2960 Manual De Usuario
14-7
Catalyst 2960 and 2960-S Switch Software Configuration Guide
OL-8603-09
Chapter 14 Configuring VTP
Understanding VTP
Figure 14-1
Flooding Traffic without VTP Pruning
shows a switched network with VTP pruning enabled. The broadcast traffic from Switch A
is not forwarded to Switches C, E, and F because traffic for the Red VLAN has been pruned on the links
shown (Port 5 on Switch B and Port 4 on Switch D).
shown (Port 5 on Switch B and Port 4 on Switch D).
Figure 14-2
Optimized Flooded Traffic with VTP Pruning
Enabling VTP pruning on a VTP server enables pruning for the entire management domain. Making
VLANs pruning-eligible or pruning-ineligible affects pruning eligibility for those VLANs on that trunk
only (not on all switches in the VTP domain).
VLANs pruning-eligible or pruning-ineligible affects pruning eligibility for those VLANs on that trunk
only (not on all switches in the VTP domain).
See the
. VTP pruning takes effect several seconds after
you enable it. VTP pruning does not prune traffic from VLANs that are pruning-ineligible. VLAN 1 and
VLANs 1002 to 1005 are always pruning-ineligible; traffic from these VLANs cannot be pruned.
Extended-range VLANs (VLAN IDs higher than 1005) are also pruning-ineligible.
VLANs 1002 to 1005 are always pruning-ineligible; traffic from these VLANs cannot be pruned.
Extended-range VLANs (VLAN IDs higher than 1005) are also pruning-ineligible.
Switch D
Switch E
Switch C
Switch F
Switch A
Switch B
Port 1
Port 2
Red
VLAN
89240
Switch D
Switch E
Switch C
Switch F
Switch A
Switch B
Port 1
Port 2
Red
VLAN
89241
Port
4
4
Flooded traffic
is pruned.
is pruned.
Port
5
5
Flooded traffic
is pruned.
is pruned.