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Cisco ME 3400 User Manual

Cisco ME 3400
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44-19
Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-07
Chapter 44 Troubleshooting
Using the show platform forward Command
Note Be aware that the debugging destination you use affects system overhead. Logging messages to the
console produces very high overhead, whereas logging messages to a virtual terminal produces less
overhead. Logging messages to a syslog server produces even less, and logging to an internal buffer
produces the least overhead of any method.
For more information about system message logging, see Chapter 28, “Configuring System Message
Logging.
Using the show platform forward Command
The output from the show platform forward privileged EXEC command provides some useful
information about the forwarding results if a packet entering an interface is sent through the system.
Depending upon the parameters entered about the packet, the output provides lookup table results and
port maps used to calculate forwarding destinations, bitmaps, and egress information.
Note For more syntax and usage information for the show platform forward command, see the switch
command reference for this release.
Most of the information in the output from the command is useful mainly for technical support
personnel, who have access to detailed information about the switch ASICs. However, packet forwarding
information can also be helpful in troubleshooting.
This is an example of the output from the show platform forward command on Gigabit Ethernet port 1
in VLAN 5 when the packet entering that port is addressed to unknown MAC addresses. The packet
should be flooded to all other ports in VLAN 5.
Switch# show platform forward gigabitethernet0/1 vlan 5 1.1.1 2.2.2 ip 13.1.1.1 13.2.2.2
udp 10 20
Global Port Number:24, Asic Number:5
Src Real Vlan Id:5, Mapped Vlan Id:5
Ingress:
Lookup Key-Used Index-Hit A-Data
InptACL 40_0D020202_0D010101-00_40000014_000A0000 01FFA 03000000
L2Local 80_00050002_00020002-00_00000000_00000000 00C71 0000002B
Station Descriptor:02340000, DestIndex:0239, RewriteIndex:F005
==========================================
Egress:Asic 2, switch 1
Output Packets:
------------------------------------------
Packet 1
Lookup Key-Used Index-Hit A-Data
OutptACL 50_0D020202_0D010101-00_40000014_000A0000 01FFE 03000000
Port Vlan SrcMac DstMac Cos Dscpv
Gi0/1 0005 0001.0001.0001 0002.0002.0002
------------------------------------------
Packet 2
Lookup Key-Used Index-Hit A-Data
OutptACL 50_0D020202_0D010101-00_40000014_000A0000 01FFE 03000000
Port Vlan SrcMac DstMac Cos Dscpv

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Cisco ME 3400 Specifications

General IconGeneral
CategorySwitch
Rack MountableYes
Jumbo Frame SupportYes
Authentication MethodRADIUS, TACACS+
RAM128 MB
Flash Memory32 MB
Power DeviceInternal power supply
ModelME 3400
LayerLayer 2
MAC Address Table Size8000 entries
Remote Management ProtocolSNMP, Telnet, SSH, HTTP, HTTPS
FeaturesVLAN support, IGMP snooping, Quality of Service (QoS)
Compliant StandardsIEEE 802.3, IEEE 802.3u, IEEE 802.1D, IEEE 802.1Q, IEEE 802.3ab, IEEE 802.3x
Memory128 MB
Power SupplyAC 120/230 V (50/60 Hz)
Dimensions (H x W x D)4.4 cm x 44.5 cm x 24.2 cm
Routing ProtocolStatic routing

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