Troubleshooting - HPE FlexNetwork MSR series Configuration Manual

[RouterA-Bri2/4/0] isdn spid resend 2
2. Configure Router B:
# Configure dialer-group 1 to allow any IP packets to trigger a call setup.
<RouterB> system-view
[RouterB] dialer-group 1 rule ip permit
# Assign interface BRI 2/4/0 an IP address.
[RouterB] interface bri 2/4/0
[RouterB-Bri2/4/0] ip address 202.38.154.2 255.255.0.0
# Enable C-DDR on the interface, configure the route to Router A, and assign the interface to
dialer-group 1.
[RouterB-Bri2/4/0] dialer circular enable
[RouterB-Bri2/4/0] dialer route ip 202.38.154.1 8810152
[RouterB-Bri2/4/0] dialer-group 1
# Set the switch type to NI on the BRI interface.
[RouterB-Bri2/4/0] isdn protocol-type ni
# Assign SPID 12345 to the B1 channel and SPID 23456 to the B2 channel.
[RouterB-Bri2/4/0] isdn spid1 12345
[RouterB-Bri2/4/0] isdn spid2 23456
# Set the maximum number of INFORMATION retransmissions to 2.
[RouterB-Bri2/4/0] isdn spid resend 2
3. Verify the configuration:
# Ping 202.38.154.2 from Router A to verify that the state of a B-channel on BRI 2/4/0 changes
to Line up.
# Ping 202.38.154.2 again to verify that the ISDN BRI line transfers data without any losses.

Troubleshooting

Symptom
Two devices cannot ping each other over an ISDN PRI or BRI line.
Analysis
The following are typical ISDN call failure causes:
•
The ISDN interface is not configured or activated.
•
The dial-up configuration is incorrect.
•
The line is not well connected.
Solution
To resolve the problem:
1. Execute the display isdn call-info command to verify the interface settings:
a. If the command displays nothing, configure an ISDN interface. For more information about
configuring BRI, CE1/PRI, and CT1/PRI interfaces, see Interface Configuration Guide.
b. Verify the Q.921 state of the PRI or BRI interface:
−
−
If the PRI interface's link layer 1 is not in ISDN MULTIPLE_FRAME_ESTABLISHED
state, Q.921 negotiation has failed. You must check Q.921 settings or the physical
connection.
If any link layers of the BRI interface are not in TE1_ASSIGNED state, Q.921
negotiation has failed. You must check Q.921 settings or the physical connection.
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