Managing Switches
Configuring Switch Features
3 | Protocol Priority | The switch can prioritize outbound packets for one or more of these |
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| network protocols: IP, IPX, ARP, DECNet, AppleTalk, SNA, and NetBEUI. |
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| Default state: No override for any protocol. |
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| If a packet does not meet the criteria for Protocol priority, then |
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| precedence defaults to VLAN criteria, below. |
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4 | VLAN Priority | Enables packet priority based on the name of the VLAN in which the |
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| packet exists. For example, if the default VLAN (DEFAULT_VLAN) and |
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| the “Blue” VLAN are both assigned to a port, and Blue VLAN traffic is |
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| more important, you can configure CoS to give Blue VLAN traffic a |
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| higher priority than DEFAULT_VLAN traffic. (Priority is applied on the |
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| outbound port.) Default state: No override. |
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| If a packet does not meet the criteria for VLAN priority, then precedence |
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| defaults to Incoming 802.1p criteria, below. |
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5 | Incoming 802.1p Priority | When a packet enters the switch on a tagged VLAN, if CoS is not |
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| configured to apply to the packet’s priority setting, the switch uses the |
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| packet’s existing 802.1p priority (assigned by an upstream device or |
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| application) to determine which outbound port queue to use. If the |
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| packet leaves the switch on a tagged VLAN, then there is no change to |
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| its 802.1p priority setting. If the packet leaves the switch on an undated |
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| VLAN, the 802.1p priority is dropped. |
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| Entering (Inbound) 802.1pPriority |
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| Outbound Port Queue |
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| Normal |
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| High |
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| Exiting (Outbound 802.1p Priority) |
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| If a packet does not meet the criteria for Incoming 802.1p priority, then |
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| the packet is sent to the “normal” outbound queue of the appropriate |
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| port. If the packet did not enter the switch on a tagged VLAN, but exits |
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| from the switch on a tagged VLAN, then a tagged VLAN field, including |
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| an 802.1p priority of 0 (normal), is added to the packet. |
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Assigning a Monitoring Port
The Monitor Port tab (only found on switches) lets you select a “Monitoring Port” that you can use with a network analyzer to monitor other ports on the switch. For the HP J3298A and HP J3299A you can only choose the Monitoring port and the port to be monitored. For other switches you can choose to have all the ports for one VLAN monitored, or you can select individual ports to be monitored. See the online help for information on specific switches.
