Specifications

56
Channelized and Electrical Interface Line Card Installation and Configuration
78-16417-02
Configuring and Troubleshooting Line Card Interfaces
Advanced Line Card Troubleshooting
This section provides advanced troubleshooting information in the event of a line card failure. It also
provides pointers for identifying whether or not the failure is hardware related. This section does not
include any software-related failures, except for those that are often mistaken for hardware failures.
Note This section assumes that you possess basic proficiency in the use of Cisco IOS software commands.
By reading this section and by following the troubleshooting steps, you should be able to determine the
nature of the problems you are having with your line card. The first step is to identify the cause of the
line card failure or console errors that you are seeing. To discover which card may be at fault, it is
essential to collect the output from the following commands:
• show context summary
• show logging
• show logging summary
• show diag slot
• show context slot slot
Along with these show commands, you should also gather the following information:
Table 31 6E3-SMB or 12E3-SMB Line Card Serial Interface Default Values
Parameter Configuration Command Default Value
BERT errors range 1 to 255 inclusive 1
BERT pattern interval bert pattern {0s | 1s | 2^15 | 2^20 | 2^23 | qrss }
interval interval_value
[no] bert
Clock source clock source [internal | line]line
Cyclic redundancy check crc [16 | 32] 16
DSU mode [no] dsu mode [cisco | digital-link | kentrox]cisco
DSU subrate bandwidth [no] dsu bandwidth kbps 34010
Encapsulation encapsulation [hdlc | ppp | frame-relay]hdlc
Idle character mode [no] idle-character [flags | marks]flags
Invert data [no] invert data no invert data
Keepalive [no] keepalive keepalive 10
Loopback mode [no] loopback [local | network line | network payload] no loopback
Maximum transmission
unit
[no] mtu bytes 4470 bytes
National bit [
no] national bit 1 0
Payload scrambling [no] scramble no scramble
Transmitter delay [no] transmitter-delay delay value 0–255