3Com 8807 Command Reference Manual page 776

774 C 42: VPLS C
HAPTER
cos
C
ONFIGURATION OMMANDS
Description
Use the broadcast-restrain command to configure the percentage of VSI
broadcast suppression. In the VSI, the part of broadcast traffic (including
broadcast, multicast, unknown unicast) beyond the suppression percentage is
discarded.
Example
# Set the broadcast suppression percentage of VSI 3Com to 10%.
<SW8800> system-view
[SW8800] vsi 3Com static
[3Com-vsi-3Com] broadcast-restrain 10
Syntax
cos { cos-value | user-define-table p p p p p p p p }
View
VSI view
Parameter
cos-value: Specifies Class of Service (CoS). CoS ranges from 1 to 8 and defaults to
1.
p p p p p p p p: User-defined CoS mapping table.
Description
Use the cos command to map user priority 802.1Q COS to PSN COS (PSN: Public
Switching Network; COS: Class Of Service). When you specify a COS mapping
relationship, use the mapping table recommended by the protocol. The protocol
recommends the following COS mapping table.
Table 97 IEEE 802.1Q COS service mapping table
User Priority
0 Best Effort (Default) 0
1 Background
2 Spare
3 Excellent Effort
4 Controlled Load
5 Interactive
Multimedia
6 Interactive Voice
7 Network Control
With this mapping table, the cos command specifies available classes of service
from 1 to 8 and the CoS and the user priority specified combine to determine the
COS of user data transmitted over PSN.
Available classes of service
1 2 3
0 0
0 0 0
0 0 0
0 0 0
0 1 1
0 1 1
0 1 2
0 1 2
4 5 6
1 1 1
0 0 0
0 0 0
1 1 2
2 2 3
2 3 4
3 4 5
3 4 5
7 8
1 2
0 0
0 1
2 3
3 4
4 5
5 6
6 7