Cabletron Systems FRM, Руководство пользователя

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7-14 Frame Relay Module 4. 0 User G uide, Rev 01
Frame Relay Port Parameters
1 If set to Y , no backup DLCIs on this port will be used (even if the port is enabled via
on-line port enable).
2 If one physical frame relay port will connect to several remote sites, be sure the line
speed is adequately higher that the speeds configured on the remote sites. Also, this
value does not apply to a T1 or E1 port; on those port types, the speed is pre-determined.
3 If this port will connect to a frame relay network, set Logi cal DCE to N . Also note that
one end of a frame relay backup connection must be configured as logical DCE.
4 Not applicable to T1/E1 ports.
5 This parameter is relevant only if
Physical Port I nterface is something other than RS-
232 and G enerate Clock is Y .
6 These parameters are relevant only if Link Layer Management is LMI or ANNEXD and
Logical DCE is N .
7 N3 should be greater than or equal to N2 .
8 If Link Layer Management is none , this parameter is irrelevant. (If Link Layer Man-
agement is changed to none from some other value, the default for N2 will be left as it
was before the change.)
9 T2 should be greater than or equal to T1 .
10 This parameter is relevant only if Logical DCE is Y .
Table 7-3 Frame Relay Port Parameters
Parameter Valid Values Default Value
Port Type Fram e Rel ay not valid here
Physical Port Interface see explanation see explanation
Blocked Port Flag Y/ N
1
N
Line Speed (bits per sec) see explanation
9600
2
Maximum Bytes per Frame 16–4096 1600
Logical DCE Y/ N
3
Y
Generate Clock
4
Y/ N Y
Rcv Clock (TT) from DTE
4,5
Y/ N N
Link Layer Management None, LMI, ANNEXD None
N1 Polling Count
6
1–6 6
N2 Error Threshold
6
1–10
7
2 if LMI
8
3 if Annex D
8
N3 Monitored Events Count
6
1–10
7
4
T1 Link I ntegr ity Timer (sec)
6
5–30
9
10
T2 Polli ng Veri fi cation Tim er
(sec)
10
5–30
9
15
Enable Outgoing Rate Control Y/ N N
Enable Bandwidth Al locati on Y/ N N
For Backup Use Onl y? Y/ N N
Automatic DCE Y/ N N