Connectivity Guide

Table Of Contents
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Remote port monitoring
Remote port monitoring monitors ingress and/or egress trac on multiple source ports of multiple devices and forwards the monitored
trac to multiple destination ports on dierent remote devices. Remote port monitoring helps network administrators monitor and analyze
trac to troubleshoot network problems.
In a remote port monitoring 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 to carry only monitored trac, which is forwarded on all egress ports of the VLAN. You must congure each
intermediate switch that participates in transporting monitored trac with the reserved L2 VLAN. Remote port monitoring supports
monitoring sessions where multiple source and destination ports distribute across multiple network devices.
Session and VLAN requirements
RPM requires the following:
Source session, such as monitored ports on dierent source devices.
Reserved tagged VLAN for transporting monitored trac congured on source, intermediate, and destination devices.
Destination session, where destination ports connect to analyzers on destination devices.
Congure any network device with source and destination ports. Enable the network device to function in an intermediate transport
session for a reserved VLAN for multiple remote port monitoring sessions. You can enable and disable individual monitoring sessions.
Consider the following when conguring a RPM session:
A remote port monitoring session mirrors monitored trac by prexing the reserved VLAN tag to monitored packets to transmit using
the reserved VLAN.
The source address, destination address, and original VLAN ID of the mirrored packet are prexed with the tagged VLAN header.
Untagged source packets are tagged with the reserved VLAN ID.
The member port of the reserved VLAN must have the MTU and IPMTU value as MAX+4 to hold the VLAN tag parameter.
To associate with the source session, the reserved VLAN can have up to four member ports.
To associate with the destination session, the reserved VLAN can have multiple member ports.
The reserved VLAN cannot have untagged ports.
Layer 2
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