Troubleshooting guide

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Cisco PGW 2200 Softswitch Release 9.8 Operations, Maintenance, and Troubleshooting Guide
OL-0800-14
Appendix C Troubleshooting Cisco Switch Signaling
Troubleshooting Virtual Pathways and ISLs
Command Line Interface Remote Access
To get remote access to the CLI, complete the following steps:
Step 1 From the remote host, enter the Telnet command and designate the name or IP address of the switch you
wish to access (Telnet hostname | IP address).
Step 2 At the Enter Password: prompt, enter the password for the CLI. There is no default password (press
Return or Enter) unless a password was previously established using the set password command.
Step 3 Enter the necessary commands to complete the required task.
Step 4 Enter quit and press Return (or Enter) to exit the Telnet session.
Troubleshooting Virtual Pathways and ISLs
Use a recommended protocol analyzer (locally or remotely) equipped with a ping utility to perform
Ethernet echo response tests to identify switch hardware, VLAN, and ISL connectivity problems. Use
echo to see if another host is active on the network. The ping sender initializes the identifier and
sequence number, which is used if multiple echo requests are sent. The ping sender adds some data to
the data field, and sends the ICMP echo to the destination host. The ICMP header code field is zero. The
recipient changes the type to Echo Reply and returns the datagram to the sender. Use this mechanism to
determine if a destination host is reachable.
To use the ping command, complete the following steps:
Step 1 Log in to the CLI and enter the command:
Console> show port status
The command displays a response like the following:
Port Name Status Vlan Level Duplex Speed Type
----- ------------------ ---------- ---------- ------ ------ ----- ------------
1/1 connected 523 normal half 100 100BaseTX
1/2 notconnect 1 normal half 100 100BaseTX
2/1 connected trunk normal half 400 Route Switch
3/1 notconnect trunk normal full 155 OC3 MMF ATM
5/1 notconnect 1 normal half 100 FDDI
5/2 notconnect 1 normal half 100 FDDI
Step 2 Enter the CLI command show vlan.
Console> (enable) show vlan 998
The command displays a response like the following:
VLAN Name Status IfIndex Mod/Ports, Vlans
---- -------------------------------- --------- ------- ------------------------
998 VLAN0998 active 357
VLAN Type SAID MTU Parent RingNo BrdgNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ ------ ---- -------- ------ ------
998 trcrf 100998 4472 999 0xff - - srb 0 0