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flow-based enable
2 Dene in access-list rules that include the keyword monitor. For port monitoring, Dell Networking OS only considers trac matching
rules with the keyword monitor.
CONFIGURATION mode
ip access-list
Refer to .
3 Apply the ACL to the monitored port.
INTERFACE mode
ip access-group access-list
Example of the flow-based enable Command
To view an access-list that you applied to an interface, use the show ip accounting access-list command from EXEC Privilege
mode.
Remote Port Mirroring
While local port monitoring allows you to monitor trac from one or more source ports by directing it to a destination port on the same
switch/router, remote port mirroring allows you to monitor Layer 2 and Layer 3 ingress and/or egress trac on multiple source ports on
dierent switches and forward the mirrored trac to multiple destination ports on dierent switches.
Remote port mirroring helps network administrators monitor and analyze trac to troubleshoot network problems in a time-saving and
ecient way.
In a remote-port mirroring session, monitored trac is tagged with a VLAN ID and switched on a user-dened, non-routable L2 VLAN. The
VLAN is reserved in the network to carry only mirrored trac, which is forwarded on all egress ports of the VLAN. Each intermediate
switch that participates in the transport of mirrored trac must be congured with the reserved L2 VLAN. Remote port monitoring
supports mirroring sessions in which multiple source and destination ports are distributed across multiple switches
Remote Port Mirroring Example
Remote port mirroring uses the analyzers shown in the aggregation network in Site A.
The VLAN trac on monitored links from the access network is tagged and assigned to a dedicated L2 VLAN. Monitored links are
congured in two source sessions shown with orange and green circles. Each source session uses a separate reserved VLAN to transmit
mirrored packets (mirrored source-session trac is shown with an orange or green circle with a blue border).
The reserved VLANs transport the mirrored trac in sessions (blue pipes) to the destination analyzers in the local network. Two destination
sessions are shown: one for the reserved VLAN that transports orange-circle trac; one for the reserved VLAN that transports green-
circle trac.
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Port Monitoring