3com 8807 User Guide

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ONFIGURATION

[3Com-port-group1] port GigabitEthernet 7/1/1 GigabitEthernet 7/1/2

4 Redirect the packet forwarded to the port group.

# Set the next hop of the packet forwarded to the port in port group 1 to 3.0.0.1.

[3Com-port-group1] traffic-redirect inbound ip-group 2000 rule 0 next-hop 
3.0.0.1

The following sections describe QoS configuration tasks.

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Before initiating any of these QoS configuration tasks, you should first define 
the corresponding ACL. Then you can achieve packet filtering just by activating 
the right ACL.

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To configure packet filtering, you need only to activate corresponding ACL. For 
more details, refer to the section “Activating ACL”.

Some of QoS terms are listed in the following table.

Table 158   QoS terms

CoS 

It has the same meaning as 802.1p priority. Both refer to the priority at 
packet header, with the value ranging from 0 to 7. 

Service parameters 

Switch allocates a set of parameters, which are used in achieving QoS 
functions, upon receiving a packet. Four items are included: 802.1p 
priority, DSCP priority, local precedence and drop precedence. 

Drop-precedence 

One of service parameters, ranging from 0 to 2. Drop precedence is 
allocated when the switch receives the packet and may be when the 
packet is processed. Allocating drop precedence to the packet is also 
called coloring the packet: the packet with drop precedence 2 as red, 
that with drop precedence 1 as yellow and that with drop precedence 0 
as green. Drop precedence is referred to when switch needs to drop 
packets in its congestion.