Filter
Top Products
3. Troubleshooting Functional Failures in Operation
114
Figure 3-23: Display Example of Configuration 3
(config)# show interfaces
interface gigabitethernet 1/2
switchport mode access
sflow forward ingress <- sflow forward must be set here.
!
(config)#
•See "3.23.1 Checking Filtering/QoS Setting Information" to confirm that "filter" is not set for the physical
port subject to flow statistics.
• Specifying Source IP address for sFlow packets with "sflow source," check to see if the IP address is
assigned to the port of this system.
Figure 3-24: Display Example of Configuration 4
(config)# show sflow
sflow destination 192.1.1.1 6455
sflow sample 2048
sflow source 192.1.1.100 <- This IP address must be one assigned to the port of
this system.
!
(config)#
(4) Checking NIF/port status
Execute the show interfaces command to check that up/down status of the physical port of this system or the
physical port connecting to the collector to be monitored by sFlow statistics is "active" (normal operation).
Figure 3-25: Display Example of Port Status
> show interfaces gigabitethernet 1/5
Date 2006/10/24 17:19:34 UTC
NIF1: active
48-port 10BASE-T/100BASE-TX/1000BASE-T retry:0
Average:150Mbps/24Gbps Peak:200Mbps at 15:44:37
Port5: active up 100BASE-TX full(auto) 0012.e220.ec31
Time-since-last-status-change:1:47:47
Bandwidth:10000kbps Average out:5Mbps Average in:5Mbps
Peak out:5Mbps at 15:44:36 Peak in:5Mbps at 15:44:18
Output rate: 4893.5kbps 16.8kpps
Input rate: 4893.5kbps 16.8kpps
Flow control send :off
Flow control receive:off
TPID:8100
:
>
Note: Confirm that "active" or "active up" is displayed at the underlined part.
If the port status is DOWN, see "3.6.1 Communication Is Disabled or Is Disconnected" and "3.9.1 Communication Is
Disabled or Is Disconnected."
(5) Checking settings of collector
• Confirm that the UDP port number (default: 6343) on the collector side is available to receive packets.
If the port is not ready for receiving packets, ICMP ([Type]Destination Unreachable [Code]Port Unreachable) will
be transmitted to this system.
• Confirm that other settings on the collector used are correct.