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Cisco Catalyst 8500 Series Multiservice Switch Routers
Hardware Troubleshooting for Catalyst 8540/8510 MSRs and LightStream 1010 ATM Switch: Additional Information
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Document ID: 21459
Additional Information
Contents
<<<Previous Section
Opening a TAC Case
Please provide the following output when opening a case with Cisco TAC to troubleshoot an ATM related problem:
- What is the topology? What other devices feed into this ATM switch router?
- Which interfaces have the highest traffic loads? Are these the same interfaces that are experiencing the rejected cells?
- On which MSC chip are the rejected cells occurring? Is there a high amount of traffic flowing through this set of ports? For example, drops on MSC 0 point to a high amount of traffic on interfaces in slots 0 and 1.
- Output from the following show commands:
- show hardware
- show running
- show tech
- show atm resource or show controller (depending on the platform)
Acronyms Used
The following acronyms are used throughout this document:
| Acronym |
Description |
Acronym |
Description |
| ABR |
Available Bit Rate |
PCR |
Peak Cell Rate |
| ASIC |
Application-Specific Integrated Circuit |
PTI |
Payload Type Identifier |
| ASP |
ATM Switch Processor |
PVC |
Permanent Virtual Circuit |
| CLP |
Cell Loss Priority |
SCR |
Sustained Cell Rate |
| EFCI |
Explicit Forward Congestion Indication |
SP |
Switch Processor |
| EPD |
Early Packet Discard |
SuperCAM |
Super Carrier Module |
| FC-PCQ |
Feature Card Per-Class Queuing |
SVCs |
Switched Virtual Circuits |
| FC-PFQ |
Feature Card Per-Flow Queuing |
TPD |
Tail Packet Discard |
| IE |
Information Element |
UBR |
Unspecified Bit Rate |
| ITPD |
Intelligent Tail Packet Discard |
UNI |
User-Network Interface |
| MIB |
Management Information Base |
UPC |
Usage Parameter Control |
| MSC |
Modular Switching Component |
VC |
Virtual Circuit |
| MSP |
Multiservice Switch Processor |
VCL |
Virtual Channel Link |
| OAM |
Operation, Administration and Maintenance |
VP |
Virtual Path |
| PAM |
Port Adapter Modules |
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Related Information
| Updated: Jun 05, 2005 |
Document ID: 21459 |
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