Setup Guide

RPM over VLT Scenarios
This section describes the restrictions that apply when you configure RPM in a VLT set up. Consider a simple VLT setup where two VLT
peers are connected using VLTi and a top-of-rack switch is connected to both the VLT peers using VLT LAGs in a ring topology. In this
setup, the following table describes the possible restrictions that apply when RPM is used to mirror traffic:
Table 74. RPM over VLT Scenarios
Scenario RPM Restriction Recommended Solution
Mirroring an Orphan Port on a VLT LAG —
In this scenario, the orphan port on a VLT
device is mirrored to the VLT LAG that
connects a top-of-rack (TOR) switch to the
VLT device. The packet analyzer is
connected to the TOR switch.
The bandwidth of the VLTi link is
unnecessarily used by mirrored traffic if max
rate limit value is configured in the RPM
mirror session.
Use ERPM session instead of RPM.
Mirroring an ICL LAG to Orphan Port — In
this scenario, the ICL LAG is mirrored to any
orphan port on the same VLT device. The
packet analyzer is connected to the local
VLT device through the orphan port.
No restrictions apply. If the packet analyzer is directly connected
to the VLT device, use local Port mirroring
session instead of RPM.
Mirroring an ICL LAG to the VLT LAG — In
this scenario, the ICL LAG is mirrored to the
VLT LAG on the same VLT device. Packet
analyzer is connected to the TOR.
No restrictions apply. None.
Mirroring VLT LAG to Orphan Port — In
this scenario, the VLT LAG is mirrored to an
orphan port on the same VLT device. The
packet analyzer is connected to the VLT
device through the orphan port..
No restrictions apply. If the packet analyzer is directly connected
to the VLT device, use local Port mirroring
session instead of RPM.
Mirroring using Intermediate VLT device —
In this scenario, the VLT device acts as the
intermediate device in remote mirroring. The
TOR switch contains the source-RPM
configurations that enable mirroring of the
VLT lag (of the TOR switch) to any orphan
port in the VLT device. The packet analyzer
is connected through the VLT device, but
not directly to the VLT device.
No restrictions apply None.
Mirroring Orphan Ports across VLT Devices
— In this scenario, an orphan port on the
primary VLT device is mirrored to another
orphan port on the secondary VLT device
through the ICL LAG. The port analyzer is
connected to the secondary VLT device.
No restrictions apply to the RPM session.
The following example shows the
configuration on the primary VLT
device:source orphan port
destination remote vlan
direction rx/tx/both.The following
example shows the configuration on the
secondary VLT device:
source remote
vlan destination orphan port.
None.
Mirroring VLT LAG across VLT Peers — In
this scenario, the VLT LAG on the primary
VLT peer is mirrored to an orphan port on
the secondary VLT peer through the ICL
LAG. The packet analyzer is connected to
the secondary VLT peer.
No restrictions apply to the RPM session.
The following example shows the
configuration on the primary VLT
device:source VLT LAG destination
remote vlan direction rx/tx/
both.The following example shows the
configuration on the secondary VLT
device:
source remote vlan
destination orphan port.
None
Mirroring member port of ICL LAG to
Orphan Port of peer vlt device— In this
scenario, a member port of the ICL LAG or a
The bandwidth of the VLTi link is
unnecessarily used by mirrored traffic if max
None.
Port Monitoring 643