Cabletron Systems 1800 - Manual (Page 125)

Configuring X.25 8-33
X.25 PVC Parameters
1 Logical channels must be lower than the lowest LCNs assigned to any subscribers on the
ports in the PVC configuration.
2 Valid port numbers depend on the model of SmartSwitch 1800—see port locations on
page 6-1 .
3 16, 32, 64 , 128, 256, 512, 1024, 2048 , or 4096 . Cannot be greater than the smaller
Maxim um Packet Size specified on the ports for both ends of the connection.
4 Cannot be greater than the smaller Maximum Window Size specified on the ports for
both ends of the connection.
Connection Priority
prioritizes this connection for intra-nodal traffic; the higher the number, the higher the
priority. (This priority 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 pro-
tocols.
When configuring priorities, be careful to consider the types of
traffic being routed on other connections in the SmartSwitch.
Subscriber Name
identifies the subscriber to the console operator. The software does not use this infor-
mation.
Logical Channel
is a logical link between the node and the subscriber. The physical line may have a
number of logical channels. An LCN assigned to a port in a PVC must be lower than
the lowest LCN specified for any SVC subscriber on the same port.
Port
specifies the port at each end of the PVC.
Packet Size
allows setting a packet size for each end of the PVC. Generally the same packet size
will be configured on the port at each end, as well as in the PVC.
Window Size
allows setting a window size for each end of the PVC. Generally the same window size
will be configured on the port at each end, as well as in the PVC.
Table 8-5 X.25 PVC Parameters
Parameter Valid Values Default Value
Connecti on Priori ty 0–9 0
Subscriber Name 0–31 characters none
Logical Channel 1–255 1 1
Por t 0–7 2 0
Packet Si ze 128–4096 3 128
Window Size 1–7 4 2