Information Technology Reference
In-Depth Information
VTP Pruning
Figure 4-33
vlan 1
vlan 2
vlan 3
VTP Configuration
To configure Catalysts for VTP, a VTP domain name is created, and the VTP mode is
configured. Options such as VTP pruning can be configured for all or a range of VLANs.
Example 4-16 configures VTP domain CCIE with pruning on all eligible ports. Enabling VTP
pruning on the server only enables pruning in the VTP management domain. All other devices
need to be configured for pruning.
Example 4-16
VTP Configuration
cat5000: (enable) set vtp domain ccie
VTP domain ccie modified
cat5000: (enable) set vtp mode server
VTP domain ccie modified
cat5000: (enable)
cat5000: (enable) set vtp pruning enable
This command will enable the pruning function in the entire management domain.
All devices in the management domain should be pruning-capable before enabling.
Do you want to continue (y/n) [n]? y
VTP domain ccie modified
Fast EtherChannel (FEC)
Cisco's FEC provides a method to increase the bandwidth between two systems by bundling
FE links. FEC also provides load sharing and redundancy capabilities. If a link fails in the FEC
bundle, the other links take on the rest of the traffic load. Although this discussion focuses on
FE, EtherChannel works for 10 Mbps Ethernet links and for GE links.
The requirements for EtherChannel are that all ports must be of the same speed, be in duplex
mode, and belong to the same VLAN. Up to four ports are permitted in a bundle.
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