EXP Computer S200 用户手册
Bridging
103
T0008-16F
Release 5.2M
LLC2 Local Termination
Proper LT
configuration
configuration
Figure 52 shows a Token Ring LAN properly configured for Local Termination.
Figure 52. Example of Proper LT Configuration
Local Termination running on PathBuilder S200 series switch bridges 1, 2, and 3 at
the edge points of the network provide a simple solution to congestion and
bandwidth problems across the entire network.
the edge points of the network provide a simple solution to congestion and
bandwidth problems across the entire network.
LLC Protocol
LLC is a link layer protocol used in IBM environments and defined in the IEEE802.2
LAN model. Its function is to establish, maintain, and terminate the logical link
between adjacent stations in a network.
LAN model. Its function is to establish, maintain, and terminate the logical link
between adjacent stations in a network.
LLC Frame
Description
Description
There are three types of LLC operations:
LLC2 Frame
Description
Description
Logical Link Control 2 (LLC2) is a connection-oriented, acknowledged protocol.
LLC2 requires a connection setup between two LAN devices. LLC2 is based on the
HDLC protocol and is used to transport SNA traffic, as well as other protocols.
LLC2 requires a connection setup between two LAN devices. LLC2 is based on the
HDLC protocol and is used to transport SNA traffic, as well as other protocols.
1
2
SNA
FEP
LLC2
Keepalives/Acks
LLC2
Keepalives/Acks
CC
3
CC
LLC2
Keepalives/Acks
Type
Name Description
Type 1
LLC1
Unacknowledged, connectionless services
Type 2
LLC2
Connection-oriented services
Type 3
LLC3
Acknowledged, connectionless services