Configuring Quality of Service
Defining General Settings
Cisco Small Business SFE/SGE Managed Switches Administration Guide 282
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• Committed Information Rate (CIR) — Defines CIR as the queue shaping
type. The possible field values are:
- For FE ports, the rate is 64 - 62,500 Kbps.
- For GE ports, the rate is 64 - 1,000,000 Kbps.
• Committed Burst Size (CS) — Defines CbS as the queue shaping type. CS is
supported only on GE interfaces. The possible field value is 4096 - 16,769,020
bytes.
• Ingress Rate Limit — Indicates if rate limiting is defined on the interface. The
possible field values are:
-
Checked
— Enables ingress rate limiting on the interface.
-
Unchecked
— Disables ingress rate limiting on the interface.
• Ingress Rate Limit — Defines the amount of bandwidth assigned to the
interface.
For FE ports, the rate is 62 - 100,000 Kbps.
For GE ports, the rate is 62 - 1,000,000 Kbps.
STEP 3 Modify the relevant fields.
STEP 4 Click Apply. The bandwidth settings are modified, and the device is updated.
Configuring VLAN Rate Limit
Rate limiting per VLAN allows network administrators to limit traffic on VLANs.
Rate limiting is calculated separately for each unit in a stack, and for each packet
processor in a unit. QoS rate limiting has priority over VLAN rate limiting. For
example, if a packet is subject to QoS rate limits but is also subject to VLAN rate
limiting, and the rate limits conflict, the QoS rate limits take precedence.
To define the VLAN Rate Limit:
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