Monitoring An Individual Trunk Port - Dell PowerConnect B-RX Configuration Manual

6

Monitoring an individual trunk port

The following example configures two mirror ports on the same module and one mirror port on
another module. It will illustrate how inbound traffic is mirrored to the two mirror ports on the same
module even if the traffic is configured to be mirrored to only one mirror port on the module.
BigIron RX(config)# mirror-port ethernet 1/1
BigIron RX(config)# mirror-port ethernet 1/2
BigIron RX(config)# mirror-port ethernet 2/1
BigIron RX(config)# interface ethernet 3/1
BigIron RX(config-if-e10000-3/1)# monitor ethernet 1/1 both
BigIron RX(config-if-e10000-3/1)# interface ethernet 4/1
BigIron RX(config-if-e10000-4/13)# monitor ethernet 1/2 both
This example configures two mirror ports 1/1 and 1/2 on the same module. It also configures input
and output traffic from port 3/1 to be mirrored to mirror port 1/1 and input and output traffic from
port 4/1 to be mirrored to mirror port 1/2. Because mirror ports 1/1 and 1/2 are configured on the
same module, mirror port 1/1 will receive the input traffic from port 3/1 as well as port 4/1 and
mirror port 1/2 will receive input traffic from port 4/1 as well as port 3/1 even if they are not
explicitly configured to do so. The outbound traffic from port 3/1 is mirrored to port 1/1 only, as
configured and the outbound traffic from port 4/1 is mirrored to port 1/2 only as configured.
This example also configures one mirror port 2/1 on another module, to which inbound traffic from
port 3/1 is mirrored. Because only one mirror port is configured on this module, the traffic is
mirrored as configured.
If input monitoring is enabled on two ports controlled by the same packet processor, then the input
traffic on these two ports will be mirrored to all the ports configured as mirror ports for these two
monitored ports. This restriction does not apply to outbound monitoring.
BigIron RX(config)# mirror-port ethernet 1/1
BigIron RX(config)# mirror-port ethernet 2/1
BigIron RX(config)# interface ethernet 3/1
BigIron RX(config-if-e1000-3/1)# monitor ethernet 1/1 both
BigIron RX(config-if-e1000-3/1)# interface ethernet 3/2
BigIron RX(config-if-e1000-3/2)# monitor ethernet 2/1 both
The above example configures two mirror ports 1/1 and 2/1 on different modules. Port 3/1 uses
port 1/1 for inbound and outbound mirroring. Port 3/2 uses port 2/1 for inbound and outbound
mirroring. If 3/1 and 3/2 are controlled by the same packet processor, inbound traffic from 3/1 will
be mirrored to 1/1 as well as 2/1 and similarly, inbound traffic from 3/2 will be mirrored to 2/1 as
well as 1/1. The outbound traffic on 3/1 and 3/2 are mirrored according to the configuration.
Monitoring an individual trunk port
By default, when you monitor the primary port in a trunk group, aggregated traffic for all the ports in
the trunk group is copied to the mirror port. You can configure the device to monitor individual
ports in a trunk group. You can monitor the primary port or a secondary port individually.
NOTE
You can use only one mirror port for each monitored trunk port.
To monitor traffic on an individual port in a trunk group, enter commands such as the following.
148 BigIron RX Series Configuration Guide
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