Chapter 7 Basic Setting

Table 10 Basic Setting > Switch Setup (continued)

LABEL DESCRIPTION

Priority Queue Assignment

IEEE 802.1p defines up to eight separate traffic types by inserting a tag into a MAC-layer frame that contains bits to define class of service. Frames without an explicit priority tag are given the default priority of the ingress port. Use the next two fields to configure the priority level-to-physical queue mapping.

The Switch has eight physical queues that you can map to the 8 priority levels. On the Switch, traffic assigned to higher index queues gets through faster while traffic in lower index queues is dropped if the network is congested.

Priority Level (The following descriptions are based on the traffic types defined in the IEEE 802.1d standard (which incorporates the 802.1p).

Level 7

Typically used for network control traffic such as router configuration messages.

 

 

Level 6

Typically used for voice traffic that is especially sensitive to jitter (jitter is the

 

variations in delay).

 

 

Level 5

Typically used for video that consumes high bandwidth and is sensitive to jitter.

 

 

Level 4

Typically used for controlled load, latency-sensitive traffic such as SNA (Systems

 

Network Architecture) transactions.

 

 

Level 3

Typically used for “excellent effort” or better than best effort and would include

 

important business traffic that can tolerate some delay.

 

 

Level 2

This is for “spare bandwidth”.

 

 

Level 1

This is typically used for non-critical “background” traffic such as bulk transfers that

 

are allowed but that should not affect other applications and users.

 

 

Level 0

Typically used for best-effort traffic.

 

 

Apply

Click Apply to save your changes to the Switch’s run-time memory. The Switch

 

loses these changes if it is turned off or loses power, so use the Save link on the top

 

navigation panel to save your changes to the non-volatile memory when you are

 

done configuring.

 

 

Cancel

Click Cancel to reset the fields.

 

 

7.6 IP Setup

Use the IP Setup screen to configure the default gateway device, the default domain name server and add IP domains.

7.6.1 IP Interfaces

The Switch needs an IP address for it to be managed over the network. The factory default IP address is 192.168.1.1. The subnet mask specifies the network number portion of an IP address. The factory default subnet mask is 255.255.255.0.

On the Switch, as a layer-3 device, an IP address is not bound to any physical ports. Since each IP address on the Switch must be in a separate subnet, the configured IP address is also known as IP interface (or routing domain). In addition, this allows routing between subnets based on the IP address without additional routers.

You can configure multiple routing domains on the same VLAN as long as the IP address ranges for the domains do not overlap. To change the IP address of the Switch in a routing domain, simply add a new routing domain entry with a different IP address in the same subnet.

 

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GS-4012F/4024 User’s Guide