Cabletron Systems 1800 - Manual (Page 150)

9-24 SmartSwitch 1800 4. 0 User G uide, Rev 01
If the local node does not receive an LPDU before Ti expires, the node will send an
LPDU with the P bit set to B'1' to solicit the remote station's status. Recovery will then
proceed as described under " T1 " earlier.
N3
is the number of Information LPDUs that will be received before the local node sends
an acknowledgment. This parameter is used in conjunction with
T2 to allow stations
to reduce traffic. A counter is initialized to N3 , and will be decremented by one each
time a valid sequential Information LPDU is received. When the counter reaches 0 an
acknowledgment will be sent.
N3 will be reset whenever an Information or Supervisory acknowledgment LPDU is
sent by the local node.
Tw
is the maximum number of sequentially numbered Information LPDUs that the local
node can have outstanding. If
Tw is reached, and acknowledgment will be sent.
N2
is the maximum number of times that an LPDU (including Information LPDUs resent
after a checkpoint operation) will be sent following expiration of
T1 .
Priority
prioritizes intra-nodal traffic; the higher the number, the higher the priority. (This pri-
ority has no effect on traffic exiting a node.)
Priorities are configured on all logical interfaces that use a physical frame relay port.
The device processor in the node uses these priorities to help determine the order in
which it will process protocols.
When configuring priorities, be careful to consider the types of
traffic being routed on other connections in the node.
Bandwidth Allocation Group
assigns the LLC2 host to one of sixteen groups whose parameters regulate bandwidth
usage. See "
Configuring Bandwidth Allocation Groups " on page 7-6.
Routing Subscriber ID
associates a Subscriber ID with the LLC2 host, and partially defines the local sub-
scriber IDs, all of which must begin with the
Routing Subscriber ID .
Source MAC Address Mask
is used to identify the SmartSwitch to inbound frames from a local LAN in an Origi-
nated LLC2 session. Source address masks and host MAC addresses are placed in a
forwarding list that is checked by the software when a frame is received. If the MAC
address in an incoming frame matches a configured Source MAC Address Mask, the
frame will be passed through the node for transmission out the frame relay interface.
On-Line Temporary Changes
determines whether changes made will affect the Database or System Memory values
( Database values exist in the software, and are recorded as System Memory values
when the SmartSwitch 1800 is booted.) If On-Line Temporary Changes is set to N , the