Class Of Service - Dell PowerConnect 5224 System User's Manual

forwards advertisements from other ports on the switch but does not join the advertised VLAN.
To implement GVRP in a network, you must first configure the static VLANs required on switches that are connected to computers, servers, and other devices,
so that these VLANs can be propagated across the network. For other core switches in the network, enable GVRP on the links between these devices. You
should also determine security boundaries in the network and configure GVRP settings to limit the VLAN propagation.
When GVRP is globally enabled for the switch, the default setting allows all the ports to transmit and receive VLAN advertisements, as well as automatically
join VLANs. To control and limit the VLAN propagation in a network, you can disable GVRP on ports to prevent advertisements from being propagated, or to
forbid ports from joining specific VLANs. The VLAN Membership page allows you to set ports as Forbidden, which prevents them from joining a VLAN through
GVRP.
NOTICE: GVRP-learned VLANs on the switch do not have assigned IP addresses. Therefore, the management VLAN must be statically configured on all
switches in the network before you implement GVRP.
For more information on VLANs and GVRP see "VLANs."
NOTICE: GVRP must be globally enabled for the switch before you can individually enable GVRP for a specific port or trunk.
To save any changes you make in this page, click Apply Changes. If you don't want to save the changes, click Refresh.
CLI Commands
The following table summarizes the equivalent CLI commands for items in the VLAN/GVRP page.
Command
bridge-ext gvrp
show gvrp configuration [interface]
Example
Console(config)#bridge-ext gvrp
Console(config)#

Class of Service

Class of Service (CoS) allows you to assign priority to data packets when traffic in the switch is buffered due to congestion. This switch supports CoS by using
four priority queues for each port. Data packets in a port's high-priority queue will be transmitted before packets in the lower-priority queues.
The Class of Service page allows you to set the default priority for each port or trunk, and to configure the mapping of frame priority tags to the switch's four
priority queues. The page includes links to the following options:
Port Settings — Sets the default priority for each port
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Trunk Settings — Sets the default priority for each trunk
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Traffic Classes — Configures the mapping of IEEE 802.1p priority tags to the switch's four traffic class queues
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Queue Scheduling — Configures Weighted Round Robin (WRR) queueing for the switch ports
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Layer 3/4 Priority — Configures the mapping of IP Precedence/DSCP values or IP TCP/UDP port numbers to the switch's four priority queues
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NOTICE: The IEEE 802.1p tags specify eight levels of priority, from the lowest (0) to the highest (7). IP Precedence or IP DSCP values are mapped to
these priority tag levels, and the priority levels are mapped directly to the switch's four traffic class queues.
Port Settings
In the Port Settings page, you can specify the default port priority for each port on the switch. All packets entering the switch that are untagged (do not
already have a priority value) are tagged with the specified default port priority and then sorted into the appropriate priority queue at the output port.
For each port listed in the Port column, you can assign the default port priority (from 0 to 7) to untagged frames received on the port. The default setting for
Usage
Enables GVRP for the switch.
Use the no form command to disable it.
Shows whether GVRP is enabled.