3com S7906E Instruccion De Instalación

 

9 

Enter system view 

— 

Enter ONU port view 

interface interface-type 
interface-number 

— 

Enable the ONU downlink 
bandwidth allocation 
policy and prioritize 
high-priority packets 

bandwidth downstream policy 
enable 

Required 

By default, the downlink 
bandwidth allocation policy is 
disabled and high-priority 
packets are not prioritized.  

Configure the ONU 
downlink bandwidth limit 

bandwidth downstream 
{ max-bandwidth value | 
max-burstsize value } * 

Optional 

By default, the maximum 
bandwidth is 999994 kbps, and 
the maximum burst buffer is 
8388480 bytes. 

 

z 

The configuration of high-priority packet buffering (as shown in 

) 

and that of the downlink bandwidth limit take effect only when the downlink bandwidth allocation 

policy is enabled. 

z 

The configured downlink bandwidth limitation takes effect only on known unicasts, but not on 

unknown unicasts, multicasts, or broadcasts.  

z 

The sum of the minimum uplink bandwidths configured for all the existing ONU ports under an OLT 

port cannot exceed 921600 Kbps, namely, 900 Mbps.  

 

When the ONU receives packets on an ONU port, it assigns local precedence to the packets according 

to the 802.1p-to-local precedence mapping table. 

  shows the default 802.1p-to-local 

precedence mapping table.  

Table 12-3 Default mapping between CoS precedence values and local precedence values 

0 0 

1 0 

2 1 

3 1 

4 2 

5 2 

6 3 

7 3