Troubleshooting guide

B-11
Cisco PGW 2200 Softswitch Release 9.8 Operations, Maintenance, and Troubleshooting Guide
OL-0800-14
Appendix B Troubleshooting Cisco ITP-L Signaling
Troubleshooting Cisco ITP-L-to-STP Signaling Links
ip classless
ip route 172.18.0.0 255.255.0.0 10.15.13.1
no ip http server
!
ss7 set failover-timer 3
ss7 session-0 address 10.15.13.6 7000 10.15.13.2 7000
ss7 session-0 retrans_t 600
ss7 session-0 cumack_t 300
ss7 session-0 kp_t 2000
ss7 session-0 m_retrans 2
ss7 session-0 m_cumack 3
ss7 session-0 m_outseq 3
ss7 session-0 m_rcvnum 32
!
line con 0
transport input none
line aux 0
line vty 0 4
login
!
end
Troubleshooting Cisco ITP-L-to-STP Signaling Links
Cisco ITP-Ls interface with STPs through linksets. STP linksets can support a maximum of 16 individual
SS7 signaling links. You can configure each Cisco ITP-L to interface with as many as two individual
SS7 signaling links. Cisco ITP-Ls support SS7 Message Transfer Part Levels 1 and 2 (MTP1 and MTP2)
in the Cisco ITP-L-to-STP signaling link interfaces.
When you replace a Cisco ITP-L with a new unit, complete the following steps to determine whether the
original Cisco ITP-L was the cause of the SS7 communication problem:
Step 1 Connect an SS7 protocol analyzer to a patch panel monitor port to monitor the SS7 message traffic
entering or leaving the Cisco ITP-L-to-STP link.
Step 2 Monitor the SS7 message traffic (if any) between the STP and the Cisco ITP-L.
Step 3 If the Cisco ITP-L is receiving SS7 traffic from the STP, go to Step 4.
If the Cisco ITP-L is not receiving SS7 message traffic, go to the “MTP1 Communication Problems”
section on page B-12.
Step 4 Ensure that the Cisco ITP-LSS7 is tranceiving Message Signaling Units (MSUs), Fill-in Signaling Units
(FISUs), or Link Status Signaling Units (LSSUs).
Step 5 If the Cisco ITP-L is transceiving SS7 LSSU messages, go to the “MTP2 Communication Problems”
section on page B-13.
If the Cisco ITP-L is not transceiving SS7 LSSU messages, go to Step 6.
Step 6 If the Cisco ITP-L is transceiving SS7 MSU and FISU messages, go to the “Troubleshooting Cisco ITP-L
to Cisco PGW 2200 Softswitch Communications” section on page B-14.
Step 7 If the Cisco ITP-L is not transceiving SS7 MSU and FISU messages, replace the faulty Cisco ITP-L with
a backup unit, if one is available.
If the problem is no longer present with the replacement unit, you can test the faulty unit offline to
determine the cause of the problem.