Cabletron Systems 1800 Switch User Manual


 
Configuring X.25 8-13
After making any changes, be sure to press
[F7]
to update the
system memory. Otherwise, the changes will not take effect until
the next re-boot of the SmartSwitch 1800.
There are four Logical Port screens. Selecting the entry
X.25 Logical Port - Screen "n"
at each of the first three screens will display the next screen, and pressing
[F3]
will
display the previous screen.
Any menu items preceded by asterisks instead of letters cannot be changed. These are
displayed only because the software code for the menu is shared with physical port
configuration.
If you want to configure one or more closed user groups (CUGs) for the port, press
[N]
at the third screen. (Otherwise, you do not need to configure anything on the fourth
screen.)
Logical Port Parameters
Table 8-2 Logical Port Parameters
Parameter Valid Values Default Value
Mapped DLCI Number 16–991 16
Blocked Port Flag Y/N N
Priority 0–9 0
Bandwidth Allocation Group 1–16 0
1
Encapsulation Method RFC1490, AnnexG RFC1490
Modulo 0
(8) or
1
(128)
0
(Modulo 8)
Maximum LAPB Window Size 1–7 or 1–127
2
7
N2 Retransmit Count 0–20 20
T1 Retransmit Period
(msec)
2000–15,000 3000
T2 Wait Ack Period
(msec)
0–5000 1000
T3 Link Alive Period
(sec)
1–60 5
Logical DCE Y/N Y
Lowest/Highest Incoming Channel 0–4095
3
see explanation
Lowest/Highest Two-Way Channel 0–40 95
3
see explanation
Lowest/Highest Outgoing Channel 0–4095
3
see explanation
Flow Control Negotiation Y/N N
Throughput Class Negotiation Y/N N
Local Charging Prevention Y/ N N
Reverse Charge Acceptance Y/N N
Fast Select Acceptance Y/N N
Incoming Calls Barred Y/N N
Outgoing Calls Barred Y/N N
Maximum Packet Size 128–4096
4
1024
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