3Com Switch 8807, Command Reference Manual

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774 C
HAPTER
42: VPLS C
ONFIGURATION
C
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
cos 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.
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.
Table 97 IEEE 802.1Q COS service mapping table
Available classes of service
User Priority 1 2 3 4 5 6 7 8
0 Best Effort (Default) 0 0 0 1 1 1 1 2
1 Background 0 0 0 0 0 0 0 0
2 Spare 0 0 0 0 0 0 0 1
3 Excellent Effort 0 0 0 1 1 2 2 3
4 Controlled Load 0 1 1 2 2 3 3 4
5 Interactive
Multimedia
0 1 1 2 3 4 4 5
6 Interactive Voice 0 1 2 3 4 5 5 6
7 Network Control 0 1 2 3 4 5 6 7