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Chapter 4: Web-Based Management
94 GE-DS-82 and 82-PoE Ethernet Managed Switch User Manual
Recommended STP Path Cost Range
Port Type IEEE 802.1D-1998 IEEE 802.1w-2001
Ethernet 50-600 200,000-20,000,000
Fast Ethernet 10-60 20,000-2,000,000
Gigabit Ethernet 3-10 2,000-200,000
Recommended STP Path Cost Range
Port Type Link Type IEEE 802.1D-1998 IEEE 802.1w-2001
Ethernet
Half Duplex
Full Duplex
Trunk
100
95
90
2,000,000
1,999,999
1,000,000
Fast Ethernet Half Duplex
Full Duplex
Trunk
19
18
15
200,000
100,000
50,000
Gigabit Ethernet Full Duplex
Trunk
4
3
10,000
5,000
Trunking
Port trunking is the combination of several ports or network cables to expand the
connection speed beyond the limits of any one single port or network cable. The
Managed Switch supports two types of port trunk technology:
• Static Trunk
• LACP
The Link Aggregation Control Protocol (LACP) provides a standardized means for
exchanging information between Partner Systems on a link to allow their Link
Aggregation Control instances to reach agreement on the identity of the Link
Aggregation Group to which the link belongs, move the link to that Link Aggregation
Group, and enable its transmission and reception functions in an orderly manner. Link
aggregation lets you group up to eight consecutive ports into a single dedicated
connection. This feature can expand bandwidth to a device on the network. LACP
operation requires full-duplex mode, more detail information refers to IEEE 802.3ad.