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ProSafe Plus Switch Utility
6. Repeat for the remaining ports.
802.1p Based Priority
802.1p-based priority uses a header in the data packet that identifies the class of data in the
packet (for example, voice or video). When 802.1p based priority is used, the switch reads
information in the packet header to determine the priority to assign to the packet. When
802.1p Based Priority is used, all ports on the switch check the packet header and transmit
the packet with a priority determined by the packet content.
To select 802.1p Based priority:
1. Select System and select the radio button for the switch you want to configure.
2. Select QoS. The QoS Global Configuration screen displays.
3. Select the 802.1p Based radio button. A message displays warning you that previous QoS
settings for the switch will be lost.
4. Click Yes. Data will now be processed based on 802.1p priority tags in the data.
Rate Limiting
You can limit the rate at which the switch accepts incoming data and the rate that it
retransmits outgoing data. you can set rate values. The rate choices vary depending on the
switch model.
Rate limiting can be set for a port in addition to other QoS settings. If a port has a rate limit
set, the switch restricts the acceptance or retransmission of data to the values configured.
To configure Rate Limiting:
1. Select System and select the radio button for the switch you want to configure.
2. Select QoS > Rate Limit. The QoS Rate Limit screen displays.
3. Select one or more ports then select ingress and egress rates to assign.
4. Click Apply. The rates are displayed opposite the selected ports.
5. Repeat for the remaining ports.
Broadcast Filtering
A switch can be configured to block massive transmission of broadcast packets being
forwarded to every port on the same VLAN. This is also known as broadcast storm
protection.
Failure to block broadcast storm packets can cause a delay or halt to other data. Some
switches allow you to select a storm control rate for each port, others assign a predetermined
storm control rate for all ports on the switch.