Difference between revisions of "CCNP TSHOOT Learning Guide/Chapter 4"
From Teknologisk videncenter
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Gi0/5 0001 0021.5a7c.5549 001b.2a32.2e99 | Gi0/5 0001 0021.5a7c.5549 001b.2a32.2e99 | ||
</source> | </source> | ||
| − | + | ====traceroute mac==== | |
| + | Did not work out all right. | ||
<source lang=cli> | <source lang=cli> | ||
| − | SW1#<input> | + | SW1#<input>traceroute mac 001b.0c5d.42c2 0006.5bc5.2dfb</input> |
| − | + | l2trace error response received : 3 from 192.168.4.22 | |
| − | + | Layer2 path not through SW2 [192.168.4.22]. | |
| − | + | Layer2 trace aborted. | |
| − | + | </source> | |
| − | + | ==Troubleshooting Spanning Tree== | |
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{{Source cli}} | {{Source cli}} | ||
Revision as of 08:47, 15 June 2010
This article is under development....
Maintaining and troubleshooting Campus Switched Solutions
Contents
VLAN Troubleshooting
Layer 2 reviewing
ARP
- show mac-addresses
SW1#<input>show mac-address-table</input>
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
All 0100.0ccc.cccc STATIC CPU
All 0100.0ccc.cccd STATIC CPU
<notice>...OUTPUT OMITTED...</notice>
1 001b.0cba.4f99 DYNAMIC Gi0/9
1 001b.2a32.2e99 DYNAMIC Gi0/5
1 0021.5a7c.5549 DYNAMIC Gi0/4
1 00a0.d1e6.60b4 DYNAMIC Gi0/22
41 0014.f273.96c0 DYNAMIC Gi0/7
<notice>...OUTPUT OMITTED...</notice>
41 001b.0cb6.9141 DYNAMIC Gi0/7
41 001b.0cba.4fc1 DYNAMIC Gi0/9
41 001b.2a32.2ec1 DYNAMIC Gi0/5
12 001f.297d.3460 DYNAMIC Gi0/2
20 00a0.c543.035d DYNAMIC Gi0/6
22 0003.47ca.d67c DYNAMIC Gi0/7
22 000c.296c.1120 DYNAMIC Gi0/12
24 0016.769f.ff4e DYNAMIC Gi0/8
28 0013.2085.a1fe DYNAMIC Gi0/9
28 0013.2085.c447 DYNAMIC Gi0/9
<notice>...OUTPUT OMITTED...</notice>Troubleshooting layer 2
- Hardware issues (move cable to good port)
- VLAN configuration.
- Inter-VLAN traffic must be routed
- Trunk configuration
- Same trunkprotocol (DOT1Q,ISL)
- Same Native VLAN
Verifying Layer 2 Forwarding
Often used commands
- show mac-address-table
- show vlan
- show interface trunk
- show interface switchport
- show platform forward interface - Example below
- traceroute mac - Example below
show platform forward interface example
Show how the switch will direct traffic
SW1#<input>show platform forward gigabitEthernet 0/1 vlan 1 0021.5a7c.5549 001b.2a32.2e99</input>
Ingress:
Global Port Number: 1, lpn: 3 Asic Number: 1
Source Vlan Id: Real 1, Mapped 1. L2EncapType 0, L3EncapType 3
Hashes: L2Src 0x00 L2Dst 0x09 L3Src 0x00 L3Dst 0x09
Lookup Key-Used Index-Hit A-Data
Classify 68_0070001B_2A322E99-00_00000021_5A7C5549 00FFC 00000000
InputACL 20_0070001B_2A322E99-00_00000021_5A7C5549 01FF8 01000000
L2LrnMsk FF_03FFFFFF_FFFFFFFF-00_000003FF_00000000
L2Learn 83_00010021_5A7C5549-93_00000401_00000000 01840 00000000
L2FwdMsk FF_03FFFFFF_FFFFFFFF
L2Fwd 83_0001001B_2A322E99 0003E 000000C5
Station Descriptor: F005F001, DestIndex: F005, RewriteIndex: F001
==========================================
Egress: Asic 0, switch 1
Source Vlan Id: Real 1, Mapped 1. L2EncapType 0, L3EncapType 3
portMap 0x4, non-SPAN portMap 0x4
Output Packets:
------------------------------------------
GigabitEthernet0/5 Packet 1
Lookup Key-Used Index-Hit A-Data
OutptACL 30_0070001B_2A322E99-00_00000021_5A7C5549 01FFC 01000000
Port Vlan SrcMac DstMac Cos Dscpv
Gi0/5 0001 0021.5a7c.5549 001b.2a32.2e99traceroute mac
Did not work out all right.
SW1#<input>traceroute mac 001b.0c5d.42c2 0006.5bc5.2dfb</input>
l2trace error response received : 3 from 192.168.4.22
Layer2 path not through SW2 [192.168.4.22].
Layer2 trace aborted.