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3-8 SmartSwitch 1800 4.0 User Guide, Rev 01
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Physical frame relay port (Chapter 6 and Chapter 7).
●
Physical SNA port (Chapter 6 and Chapter 9). The link station SDLC/LLC2
conversion point is also defined in this record, under SNA PU Parameters.
(These parameters act as both LLC2 Originated Host and Originated Interface
records.)
●
Terminated LLC2 Host (Chapter 9), which points to the frame relay interface.
Note that the remote SmartSwitch 1800 must have an Originated LLC2 Host.
●
Terminated LLC2 Interface (Chapter 9), which defines an LLC2 termination
point at the frame relay interface. Note that the remote SmartSwitch 1800 must
have an Originated LLC2 Interface.
●
SVC Subscriber (Chapter 7), to route the incoming connection request from the
frame relay LLC2 Terminated Host to the SDLC port. Note that this record is
not required on the remote SmartSwitch 1800, because that device originates the
connection (i.e., it is not being called).
Key Points
LAN IDs
LAN IDs can be configured in two places:
●
LLC2 node defaults, to identify a virtual bridge that connects the LLC2 function
to LAN interfaces.
●
LLC2 frame relay interfaces using 802.5 Source Route Bridge format, to
identify the ring number used by a source-route bridge at the remote end. (This
ID is normally assigned by a system administrator.) Note that the LAN ID on an
originated LLC2 interface must match the LAN ID on the corresponding termi-
nated interface.
Be aware that when configuring these records, LAN IDs must be entered in hex. Also
note that, other than the matching IDs on each originated/terminated interface pair,
each LAN ID must be unique within the network on which the SmartSwitch 1800 will
operate.
LLC2 Function
Internally, LLC2 connects to interfaces via a virtual bridge. LLC2 Host and Interface
records act as both origination and termination points for LLC2. For example, if you
are configuring SDLC-to-LLC2 conversion to be transmitted over frame relay to a
Token Ring host, the following is the logical LLC2 record flow: SNA Port/PU record
(Chapter 9), with the parameter
LLC2 Connection
set to
Yes
. (This acts as the both the
LLC2 Host and LLC2 Interface termination record). In addition, you must configure
an originated Host for the target MAC address, and an interface for the physical con-
nection.
Terminated LLC Host records always make the calls. Originated LLC Host records
always expect to receive calls.
Only one Originated and one Terminated LLC Host record can be configured for each
MAC address.