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Troubleshooting guide

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C-1
Cisco PGW 2200 Softswitch Release 9.8 Operations, Maintenance, and Troubleshooting Guide
OL-0800-14
APPENDIX
C
Troubleshooting Cisco Switch Signaling
Revised: March 7, 2011, OL-0800-14
Deploy two Cisco switches in fault-tolerant, Cisco telephony solutions. Both switches are active. Virtual
local-area networks (VLANs) are set up within these switches. System components use these VLANs to
route message traffic to other system components.
Normally, at least two Cisco SS7 interfaces are connected to each switch for redundancy. SS7 call
messages travel from the interfaces through the VLANs to the Cisco PGW 2200 Softswitches. Use these
VLANs to link the Cisco PGW 2200 Softswitches to the media gateways.
This chapter includes the following sections:
• VLANs, page C-1
• Command Line Interface, page C-1
• Troubleshooting Virtual Pathways and ISLs, page C-3
VLANs
Configure VLANs on each switch to simplify management. All intrasystem Ethernet message traffic is
partitioned and routed over VLANs according to component origination and destination. The active
VLAN configuration is the same as the configuration of the standby VLANs.
Command Line Interface
Access the Command Line Interface (CLI) either locally through a console terminal that is connected to
an EIA/TIA-232 port or remotely through a Telnet session. Telnet session access requires a previously
set IP address for the switch. Telnet sessions are automatically disconnected after remaining idle for a
configurable period.
There are two modes of operation, normal and privileged. Both modes are password protected.
Normal-mode commands are used for everyday system monitoring. Privileged commands are used for
system configuration and basic troubleshooting.
After you log in successfully, the system automatically enters normal mode, which gives you access to
normal-mode commands only. Enter privileged mode by entering the enable command that requires a
second password. The appearance of the word “enable” indicates privileged mode immediately after the
system prompt. To return to normal mode, enter the disable command at the prompt.