Filter
Top Products
Advanced Configuration and Management Guide
Adaptive Rate Policy for a Port-Based VLAN
Figure 4.4 shows a rate policy applied to a VLAN. When you apply a rate policy to a VLAN, the policy applies to
all the ports in the VLAN. The rate policy in this example performs the following actions on traffic received on
ports in the VLAN:
• For conforming traffic, sets the precedence to 5
• For excess traffic, sets the precedence to 0
Internet
access router
Internet
Rate Policy for VLAN 2
=================
Inbound IP traffic
-Normal Burst - set IP precedence to 5 and forward
-Excess Burst - set IP precedence to 0 and forward
The hosts are in
port-based VLAN 2.
Figure 4.4 Adaptive Rate Limiting applied to a VLAN
NOTE: The rate policy in this example applies at Layer 2, while the policies in Figure 4.2 on page 4-5 and Figure
4.3 on page 4-7 apply at Layer 3. You cannot use ACLs for rate policies applied to directly to a VLAN. However,
you can use ACLs if you apply the rate policy to a VLAN’s virtual interface instead.
Adaptive Rate Limiting Parameters
The application examples in “Examples of Adaptive Rate Limiting Applications” on page 4-5 describe the rate
policies but do not describe the parameters used to configure the policies. The parameters specify the portion of
an interface’s bandwidth you are allocating to specific traffic, the conforming and excess quantities of bytes for the
traffic, and the granularity of the Adaptive Rate Limiting.
4 - 8