KYLAND Technology SICOM3024P, Руководство по работе в сети

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Advanced Configuration
32
Description: The egress rate for a 100M port ranges from 64 to 100000Kbps.
The ingress rate for a 1000M port ranges from 64 to 1000000Kbps.
Caution:
If a rate value is set to 0, rate control is disabled on the port.
6.1.3 Typical Configuration Example
Set the rate threshold of unicast and multicast packets on port 2 to 70Kbps, broadcast
packets to 80Kbps, and outgoing rate to 90Kbps.
Configuration steps:
1. Select unicast and multicast packets in the Service column, and broadcast packets in the
Broadcast column, as shown in Figure 30.
2. On port 2, set the service rate threshold to 70Kbps, broadcast rate threshold to 80Kbps,
and outgoing rate to 90Kbps, as shown in Figure 31.
6.2 VLAN
6.2.1 Overview
One LAN can be divided into multiple logical Virtual Local Area Networks (VLANs). A device
can only communicate with the devices on the same VLAN. As a result, broadcast packets
are restricted to a VLAN, optimizing LAN security.
VLAN partition is not restricted by physical location. Each VLAN is regarded as a logical
network. If a host in one VLAN needs to send data packets to a host in another VLAN, a
router or layer-3 device must be involved.
6.2.2 Principle
To enable network devices to distinguish packets from different VLANs, fields for identifying
VLANs need to be added to packets. At present, the most commonly used protocol for VLAN
identification is IEEE802.1Q. The following table shows the structure of an 802.1Q frame.
Table 3 802.1Q Frame Structure
DA SA 802.1Q Header Length/Type Data FCS