ip1718lf ETC-unknow, ip1718lf Datasheet - Page 24

• Manufacturer Part Number: ip1718lf
• Description: 18-port 10/100mbps Smart Switch Controller
• Manufacturer: ETC-unknow

Copyright © 2003, IC Plus Corp.
68H
69H
6AH
Register
Address
Trunk group 0 (p4, p3, p2, p1) setting
port 1 ~ port 4 are the same trunk group and can be any
combination to form a trunk. The trunk ID described below is derived
by the algorithm defined in register 2FH.
bit[3:0] : trunk configuration for port 01
bit[7:4] : trunk configuration for port 02
bit[11:8] : trunk configuration for port 03
bit[15:12] : trunk configuration for port 04
Note : In a trunk group, the configuration should be ORed to 4'b1111
and no more than one port has the same configuration bit.
Example 1:
bit[3:0] = 4’b1100,
bit[7:4] = 4’b0010,
bit[11:8]=4’b0001,
bit[15:12]=4’b0000.
This configuration stands for the following forwarding rule.
Forwarding to port 1 of this group when the hash result defined in
register 21H is 3 or 2.
Forwarding to port 2 of this group when the hash result defined in
register 21H is 1.
Forwarding to port 3 of this group when the hash result defined in
register 21H is 0.
Port 4 is not allowed to forward the data since bit[15:12] is set to
4’b0000.
Example 2:
Bit[3:0]=4’b1100, bit[15:12]=4’b1000 is not allowed.
When the hash result is 3, the switch can not decide to forward the
packet through either port 1 or port 4.
Trunk group 1 (p8, p7, p6, p5) setting
port 5 ~ port 8 are the same trunk group and can be any
combination to form a trunk
bit[3:0] :
bit[7:4] :
bit[11:8] :
bit[15:12] :
Trunk group 2 (port 17, port 18) setting
port 17 ~port 18 are the same trunk group
bit[3:0] :
bit[7:4] :
4'b0000 : the trunk is disabled.
4'bxxx1 : pass the frame with trunk ID = 0
4'bxx1x : pass the frame with trunk ID = 1
4'bx1xx : pass the frame with trunk ID = 2
4'b1xxx : pass the frame with trunk ID = 3
trunk configuration for port 07
trunk configuration for port 05
trunk configuration for port 06
trunk configuration for port 17
trunk configuration for port 18
trunk configuration for port 08
Register Description
24/33
Preliminary Data Sheet
R/W
R/W
R/W
Attribute
IP1718 LF-DS-R05
IP1718 LF
January 27, 2005
16’h0000
16’d0
8’h00
Default
value