When we configure the VLANs across multiple Cisco switches in the LAN, for transfering the VLAN information to the new swithces being connected we use the VTP server. This VTP(VLAN Trunking Protocol Server)reduces the need to configure the same VLAN everywhere. To do this, VTP carries VLAN information to all the switches in a VTP domain. All the switches in the LAN should be configured to be a part of a single VTP domain for this purpose.
SPAN is the way of monitoring the network traffic in a switch in a particular port by connecting the monitoring devices to a different port in the same switch. Here the entire traffic(in and out) is mirrored into the span/sniffer port(the port where the monitoring device is connected) without any load in the switch. In case of monitoring multiple ports in multiple switches in the LAN, then RSPAN(Remote SPAN) is configured in the switches so that the traffic will be mirrored to the specified port for monitoring. The configuration examples for the specified Cisco switches can be found in the Cisco web site.
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When we configure the VLANs across multiple Cisco switches in the LAN, for transfering the VLAN information to the new swithces being connected we use the VTP server. This VTP(VLAN Trunking Protocol Server)reduces the need to configure the same VLAN everywhere. To do this, VTP carries VLAN information to all the switches in a VTP domain. All the switches in the LAN should be configured to be a part of a single VTP domain for this purpose.
SPAN is the way of monitoring the network traffic in a switch in a particular port by connecting the monitoring devices to a different port in the same switch. Here the entire traffic(in and out) is mirrored into the span/sniffer port(the port where the monitoring device is connected) without any load in the switch.
In case of monitoring multiple ports in multiple switches in the LAN, then RSPAN(Remote SPAN) is configured in the switches so that the traffic will be mirrored to the specified port for monitoring.
The configuration examples for the specified Cisco switches can be found in the Cisco web site.
K.Rajkumar
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