3-8 Smart Switch 1800 4. 0 User Guide , Rev 0 1
●Physical frame relay port (Chapter 6 an d Chapter 7).
●Physical SNA port (Chapter 6 and Chap t e r 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 (Chapt er 7), to rou te the incoming connection re quest from the
frame relay LLC2 Terminated Host to the SDLC port. Note that this record is
not required on the remote Sm artS witch 1800 , because t hat device o rig inates the
connection (i.e., it is not being called).
Key Point s
LAN IDs
LAN IDs can be configured in two places:
●LLC2 node def ault s, to id entif y a virt ual br idge th at conn ects the LLC 2 funct ion
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 LA N ID on an
originated LLC2 interface must match the LAN ID on the corresponding termi-
nated interface.
Be aware that when configuring these reco rds, LAN IDs mus t 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 Sm artSwitch 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 f ollowing is the logical L LC2 record flow: SNA Po rt/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 mu st 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 an d one Termina ted LLC Ho st record can be con fig ured for each
MAC address.