Best Practices - Cisco WS-C4507R Troubleshooting Manual

RST-3508
9805_05_2004_c2
RST-3508
9805_05_2004_c2
© 2004 Cisco Systems, Inc. All rights reserved. Printed in USA.
Presentation_ID.scr

Best Practices

Baseline the CPU in steady state
•
Normally which processes are causing the highest CPU usage
When troubleshooting
•
Are high CPU processes different from the baseline?
Is the CPU consistently elevated or just spiking?
Are there TCNs in the network caused by flapping ports?
Is there excessive broadcast or multicast traffic in the
management subnet or VLAN?
Is there excessive management traffic such as SNMP polling?
Isolate the management VLAN from VLANs with
•
user data traffic
Particularly heavy broadcast traffic such as IPX or AppleTalk
© 2004 Cisco Systems, Inc. All rights reserved.
Cisco Catalyst 4500 Architecture
3-slot, 6-slot chassis—one supervisor
•
with two or five module slots
7-slot chassis—one or two
•
supervisors with five module slots
10-slot chassis—one or two
•
supervisors (Supervisor V only) with
eight module slots
Cisco IOS supervisors provide:
•
Central forwarding engine
(Fast Forwarding Engine, FFE)
Buffering and 64 Gbps fabric (Packet
Processing Engine, PPE)...96 Gbps
fabric with Supervisor V and PPE2
12 Gbps bandwidth to each module
•
Auto MDIX on 10/100/1000 Ports
•
Modules are transparent:
•
Contain simple "stub" ASICs, PHYs
No buffering or local switching
© 2004 Cisco Systems, Inc. All rights reserved.
Forwarding Engine (FFE)
Forwarding Engine (FFE)
Shared Memory
Shared Memory
Fabric (PPE) Fabric (PPE)
Switching Switching Switching Switching
Module Module Module Module
Switching Switching Switching Switching
Module Module Module Module
Note: Supervisor Engine V Supports
3 Additional Line Card Slots
39 39 39
Switching Switching
Module Module
40 40 40