Alcatel Carrier Internetworking Solutions 6648 User Manual

Alcatel Carrier Internetworking Solutions Computer Accessories

OmniSwitch Troubleshooting Guide

September 2005

Part No. 031496-00, Rev. C

September 2005

OmniSwitch 6624/6648/

6800/7700/7800/8800

Troubleshooting Guide

www.alcatel.com

This manual is related to the following products:

8800 6624 7800 7700

Table of contents

Document Outline

Home
Front Matter
- Copyright Information
- Patents
- Contacting Alcatel
Contents
About This Guide
- Supported Platforms
- Who Should Read this Manual?
- When Should I Read this Manual?
- What is in this Manual?
- What is Not in this Manual?
- How is the Information Organized?
- Related Documentation
- Before Calling Alcatel’s Technical Assistance Center
1. Troubleshooting the Switch System
- In This Chapter
- Introduction
- Troubleshooting System for OS-6624/6648 and OS-7/8XXX
- Advanced Troubleshooting
- Dshell Troubleshooting
  - Troubleshooting NIs on OmniSwitch 7700/7800/8800
  - OmniSwitch 6624/6648 Dshell Troubleshooting
    - Accessing Dshell on Idle Switches
- Using AlcatelDebug.cfg
- Troubleshooting IPC on OS-6/7/8XXX Series of Switches
  - Debugging IPC
  - OmniSwitch 6624/6648 Example
- Port Numbering Conversion Overview
2. Troubleshooting Switched Ethernet Connectivity
- In This Chapter
- Overview of Troubleshooting Approach
- Verify Physical Layer Connectivity
- Verify Current Running Configuration
- Verify Source Learning
- Verify Switch Health
- Verify ARP
- Using the Log File
3. Troubleshooting Source Learning
- In This Chapter
- Introduction
- Troubleshooting a Source Learning Problem
- Advanced Troubleshooting
- Dshell Troubleshooting
  - OS-6600
4. Troubleshooting Spanning Tree
- In This Chapter
- Introduction
- Troubleshooting Spanning Tree
- Dshell
- Generic Troubleshooting in Dshell
- Writing a PR for Spanning Tree
5. Troubleshooting BOOTP/ DHCP/UDP Relay
- In This Chapter
- Starting the Troubleshooting Procedure
- Advanced Troubleshooting for UDP Relay
- Dshell
6. Troubleshooting DNS
- In This Chapter
- Introduction
- Troubleshooting a DNS Failure
  - Starting the Troubleshooting Procedure
  - Layer 7 DNS or Name Resolution Issue
- DNS Configuration Considerations
7. Troubleshooting Link Aggregation
- In This Chapter
- Link Aggregation Limits and Guidelines
  - OmniSwitch 6624/6648 Restrictions
- Troubleshooting a Link Aggregation Failure
- Advanced Link Aggregation Troubleshooting
- 6800 Link Aggregation Debug Functions
8. Troubleshooting 802.1Q
- In This Chapter
- Troubleshooting 802.1Q
  - Default VLAN Traffic
  - Tagged Packet on an Untagged Port
    - 802.1Q with VLAN ID of 0
    - 802.1Q and 64 Byte Packets
- Advanced Troubleshooting
- Dshell Commands
9. Troubleshooting Group Mobility
- In This Chapter
- Troubleshooting a VLAN Mobility Failure
- Advanced Troubleshooting
- Dshell
  - NI Debug Dshell
- 6800 Group Mobility Troubleshooting
10. Troubleshooting QoS
- In This Chapter
- QoS Behavior
  - Default
  - QoS Queues and Ports
- Troubleshooting QoS
- Example QoS Rules
11. Troubleshooting ARP
- In This Chapter
- ARP Protocol Failure
- Common Error Conditions
- Advanced ARP Troubleshooting
- Dshell Troubleshooting
  - Viewing the ARP Table on OmniSwitch 6624/6648 Switches
12. Troubleshooting IP Routing
- In This Chapter
- Introduction
- IP Routing Protocol Failure
- Troubleshooting via the CLI
- Troubleshooting with Debug CLI
- RIP Troubleshooting
- OSPF Troubleshooting
- BGP Troubleshooting
- Dshell Troubleshooting Advanced IP Routing
13. Troubleshooting Virtual Router Redundancy Protocol (VRRP)
- In This Chapter
- Overview
- Protocol Information
- OmniSwitch 7700/7800/8800 Implementation
  - VRRP Security
  - OmniSwitch VRRP Limitations
- CMM Failover
- OmniSwitch VRRP Troubleshooting
- ARP Table
- Dshell Troubleshooting
14. Troubleshooting IP Multicast Switching (IPMS)
- In This Chapter
- Troubleshooting a Device that Cannot Join an IP Multicast Stream
- Troubleshooting a Device that Drops Out of an IP Multicast Stream
- Troubleshooting IPMS in Debug CLI
- Dshell Troubleshooting
15. Troubleshooting DVMRP
- In This Chapter
- Introduction
- DVMRP Troubleshooting
  - DVMRP Global and Interface Commands
  - DVMRP Debug Commands
16. Troubleshooting PIM-SM
- In This Chapter
- Introduction
- Definition of Terms
- Protocol Overview
  - DR Election
- BSR Election
  - Simplified Packet Format
  - Debugging BSR/Bootstrap
    - Election of a New BSR
    - Related CLI Command
- C-RP Advertisements
  - Simplified RP-Advertisement Packet Format
  - Debugging C-RP-Adv
    - Related CLI Command
- RP-SET
  - Simplified Bootstrap RP-SET Packet Taken on a 192.168.12/24 Network
  - Debugging RP-SET
    - On Non BSR You Should See
    - Related CLI Command
- Join/Prune
- Register
  - Simplified REGISTER Packet Format
- Shared Tree
  - Related CLI Command
- Source-Based Tree
  - Related CLI Command
- Troubleshooting Examples: Limitations
17. Troubleshooting Server Load Balancing
- In This Chapter
- Introduction
- Server Load Balance Failure
- Troubleshooting Commands
- Troubleshooting a Complete Failure
- Troubleshooting a Partial Failure
- The Troubleshooting Procedure
18. Troubleshooting Authenticated VLANs
- In This Chapter
- Introduction
- Troubleshooting AVLAN
- Troubleshooting Using Debug Systrace
- Dshell Troubleshooting
  - Authentication Dispatcher (AD) Debugging Help
  - The Authenticated VLAN adDebugShowContext Function
19. Troubleshooting 802.1X
- In This Chapter
- Troubleshooting with the CLI
- Troubleshooting Using Debug CLI
- Dshell Troubleshooting
A. OS6600/OS7700/OS8800 Architecture Overview
- In This Chapter
- The MAC ASIC
  - Catalina
  - Firenze
  - The Coronado ASIC
  - Functional Description
- Queue Driver Interaction
  - Ethernet Driver
  - Queue Dispatcher
  - NI Supervision
  - Source Learning
  - L3 Manager/IPMS
  - QoS Manager
- Link Aggregation
- Coronado Tables
  - Layer 2 Tables
  - Layer 3 Tables
- Source Learning
- Hardware Routing Engine (HRE)
- QoS/Policy Manager
- Coronado Egress Logic
- The Fabric Architecture
- Nantucket ASIC
  - Additional Nantucket Specifications
    - Functional Description:
    - Data Flow
  - Calendar Manager Module
  - Data Port Output Module
  - Nantucket Redundancy
- Roma
  - Functional Description
  - CMM Takeover and Hot Swap
  - Framing Error
- Chassis Management Module (CMM)
  - OS7000 CMM
  - OS8800 CMM
  - Functional Description of CMM
  - Chassis Manager Component of System Services
  - CMM Reload of NI Module
  - Overall System Architecture
- Packet Walk
  - Packet Walk Principles
  - Data Flow Overview
- Specific Packet Flows
  - Unknown L2 Source, Known L2 Destination
- Unknown Destination
  - Known L2 Source, Unknown L2 Destination
  - Traffic is Being Passed; the Switch is Attempting to Put a Correct L2 DA Entry on the NI
    - The Coronado ASIC
  - Unknown L3 DA
    - The Coronado ASIC
- Hardware Buses on OmniSwitch 7700/7800/ 8800 Switches
  - Xybus
  - Fbus
  - Bbus
- Bus Mapping on OmniSwitch 7700/7800/8800 Switches
  - Xybus Mapping
  - Fbus Mapping
    - Falcon (OmniSwitch 7700/7800) Fbus Mapping
    - Eagle (OmniSwitch 8800) Fbus Mapping
- OS6624/6648 Architecture
  - Hardware Architectural Overview
  - Layer 2 Forwarding
  - Layer 3 Forwarding
  - VLANs
- CMM Functionality for OS6600
- OS6600 IPC Communication
- OS6600 BOOT Sequence
B. Debug Commands
C. Technical Support Commands
D. Modifying Files with VI Editor
- In This Chapter
- Useful VI Commands
- Sample VI Session
Index