Filter
Top Products
Overview
1-6 Introduction
Administrators can configure up to four rate limit rules per port; however, each rule must not
include conflicting 802.1p priority values. In order to control traffic inbound and outbound on the
same port, two rate limit rules must be configured (one inbound and one outbound). Since the rate
limiting operation occurs after the processing of the multi-layer classification rules, the two
features can be combined to provide application-aware rate limiting.
For more information about the application of the Rate Limiting function, refer to the SmartSwitch
Series 6H202, 6H203, 6H252, 6H253, 6H258, 6H259, 6H262, 6E233, and 6E253 Local
Management User’s Guide.
1.1.10 GARP Switch Operation
Some or all ports on the switch may be activated to operate under the Generic Attribute
Registration Protocol (GARP) applications, GARP VLAN Registration Protocol (GVRP) and/or
GARP Multicast Registration Protocol (GMRP).
GARP is a protocol, or set of rules, that outlines a mechanism for propagating the port state and/or
user information throughout a bridged LAN to keep track of users and VLANs on the network
fabric. MAC bridges and end users alike can take part in the registration and de-registration of
GARP attributes such as VLAN and multicast group membership. For more details on how GVRP
and GMRP handle frames under GARP, and how to configure the switch ports to take advantage of
this operation, refer to the SmartSwitch Series 6H202, 6H203, 6H252, 6H253, 6H258, 6H259,
6H262, 6E233, and 6E253 Local Management User’s Guide.
1.1.11 Flow Control
Flow Control is a method of managing the flow of frames between two devices. It ensures that a
transmitting device does not overwhelm a receiving device with data. This enables the receiving
device to communicate with the transmitting device, and to have it pause its transmission while the
receiving device processes the frames already received. Both devices must support the
IEEE 802.3x standard for flow control to work.
The SmartSwitches support the following two types of flow control:
• frame based 802.3x
• back pressure
NOTE
This traffic rate function is not supported on ports configured as SmartTrunk ports.