Administrator Guide

Usage
Information
Because this command calculates based on a Layer 2 hash algorithm, use this
command to display flows for switched Layer 2 packets, not for routed packets
(use the show ip flow command to display routed packets).
The show port-channel-flow command returns the egress port identification
in a given port-channel if a valid flow is entered. A mismatched flow error occurs if
MAC-based hashing is configured for a Layer 2 interface and you are trying to
display a Layer 3 flow.
The output displays three entries:
• Egress port for unfragmented packets.
• In the event of fragmented packets, the egress port of the first fragment.
• In the event of fragmented packets, the egress port of the subsequent
fragments.
NOTE: In the show port channel flow command output, the egress port
for an unknown unicast, multicast, or broadcast traffic is not displayed.
The following example shows the show port-channel-flow outgoing-port-
channel number incoming-interface interface source-mac address
destination-mac address
• Load-balance is configured for MAC
• Load-balance is configured for IP 4-tuple/2-tuple
• A non-IP payload is going out of Layer 2 LAG interface that is a member of
VLAN with an IP address
Example
Dell#show port-channel-flow outgoing-port-channel 1 incoming-
interface gi 3/0
source-mac 00:00:50:00:00:00 destination-mac 00:00:a0:00:00:00
Egress Port for port-channel 1, for the given flow, is Te
13/01
Time Domain Reflectometer (TDR)
TDR is useful for troubleshooting an interface that is not establishing a link; either it is flapping or not
coming up at all. TDR detects open or short conditions of copper cables on 100/1000 Base-T modules.
Important Points to Remember
• The interface and port must be enabled (configured—refer to the interface command) before
running TDR. An error message is generated if you have not enabled the interface.
• The interface on the far-end device must be shut down before running TDR.
• Because TDR is an intrusive test on an interface that is not establishing a link, do not run TDR on an
interface that is passing traffic.
• When testing between two devices, do not run the test on both ends of the cable.
700
Interfaces