Troubleshooting - 3Com MSR 50 Series Configuration Manual

Troubleshooting

[Router-Bri2/0] isdn spid service speech
[Router-Bri2/0] quit
# Configure a dialer interface.
[Router] interface dialer 1
[Router-Dialer1] link-protocol ppp
[Router-Dialer1] ppp pap local-user user password simple hello
[Router-Dialer1] dialer threshold 0 in-out
[Router-Dialer1] ppp mp
[Router-Dialer1] ip address ppp-negotiate
[Router-Dialer1] dialer enable-circular
[Router-Dialer1] dialer-group 1
[Router-Dialer1] dialer number 8810148
[Router-Dialer1] quit
# Configure the static route to the segment 65.0.0.0 where the network access
server is located.
[Router] ip route-static 65.0.0.0 255.0.0.0 Dialer 1 preference 60
To interoperate with the DMS 100, you must configure two commands: isdn
two-tei and isdn number-property 0. The isdn two-tei command allows each
call on the BRI interface to use a unique TEI. The isdn number-property 0
command sets the numbering plan and numbering type in the called-party
information element in ISDN Q.931 SETUP messages to unknown.
In addition, if the carrier allocates an LDN, you must configure it.
The dialer threshold 0 in-out command configured on interface dialer 1 allows
the system to bring up another B channel automatically after bringing up a BRI
link. This can be done without presence of a flow control mechanism and the links
that have been brought up will not disconnect automatically.
Symptom:
Two routers are interconnected via ISDN PRI line and they cannot ping through
each other.
Solution:
Execute the display isdn call-info command. If there is no prompt in the
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system, it indicates there is no ISDN PRI interface. Thus it is necessary to
configure corresponding interfaces. For specified configuration method, refer
to "CE1/PRI Interface" on page 106
the ISDN is not in multi-frame operation status on a PRI interface, or if ISDN is
not in TEI configured status on a BRI interface, it may not physically connected
well.
If the Q.921 maintaining has been enabled, and the ISDN on PRI is in
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multi-frame creation mode and that on BRI is in TEI configured mode, check
whether dial-up configuration is wrong. If the maintaining information "Q921
send data fail(L1 return failure)." is output, it indicates that physical layer has
no been activated. In this case, execute the shutdown or undo shutdown
command to disable or re-enable corresponding interfaces.
Troubleshooting
and "CT1/PRI Interface" on page
441
110. If