Administrator Guide

Following is a sample configuration of RPM on an intermediate switch.
DellEMC(conf)#interface vlan 30
DellEMC(conf-if-vl-20)#mode remote-port-mirroring
DellEMC(conf-if-vl-20)#tagged tengigabitethernet 1/4
DellEMC(conf-if-vl-20)#tagged tengigabitethernet 1/5
DellEMC(conf-if-vl-20)#exit
Configuring Remote Port Mirroring on a Destination switch
Following is a sample configuration of RPM on a destination switch.
DellEMC(conf)#interface tengigabitethernet 1/7
DellEMC(conf-if-te-1/7)#switchport
DellEMC(conf-if-te-1/7)#no shutdown
DellEMC(conf-if-te-1/7)#exit
DellEMC(conf)#interface vlan 30
DellEMC(conf-if-vl-30)#mode remote-port-mirroring
DellEMC(conf-if-vl-30)#tagged tengigabitethernet 1/7
DellEMC(conf-if-vl-30)#exit
DellEMC(conf)#monitor session 3 type rpm
DellEMC(conf-mon-sess-3)#source remote-vlan 30 destination tengigabitethernet 1/8
DellEMC(conf-mon-sess-3)#tagged destination tengigabitethernet 1/8
DellEMC(conf-mon-sess-3)#exit
Encapsulated Remote Port Monitoring
Encapsulated Remote Port Monitoring (ERPM) copies traffic from source ports/port-channels or source VLANs and forwards the traffic
using routable GRE-encapsulated packets to the destination IP address specified in the session.
NOTE:
When configuring ERPM, follow these guidelines
• The Dell EMC Networking OS supports ERPM source session only. Encapsulated packets terminate at the
destination IP address or at the analyzer.
• You can configure up to four ERPM source sessions on switch.
• Configure the system MTU to accommodate the increased size of the ERPM mirrored packet.
• The maximum number of source ports you can define in a session is 128.
• The system encapsulates the complete ingress or egress data under GRE header, IP header, and outer MAC header
and sends it out at the next hop interface as pointed by the routing table.
• Specify flow-based enable in case of source as VLAN or where you need monitoring on a per-flow basis.
• Specify the monitor keyword in the access list rules for which you want to mirror.
• The system allows you to configure up to four ERPM sessions.
• ERPM sessions do not copy locally sourced remote VLAN traffic from source trunk ports that carry RPM VLANs.
ERPM sessions do not copy locally sourced ERPM GRE-encapsulated traffic from source ports.
• Flow-based mirroring is supported only for source VLAN ingress traffic.
Changes to Default Behavior
• Rate-limiting is supported for the ERSPAN traffic.
• You can configure the same port as both source and destination in an ERSPAN session.
• You can configure TTL and TOS values in the IP header of the ERSPAN traffic.
Configuration steps for ERPM
To configure an ERPM session:
Table 71. Configuration steps for ERPM
Step Command Purpose
1
configure terminal
Enter global configuration mode.
640 Port Monitoring