Concept Guide

• Single MD can be monitored on max. of 4 MG ports.
Port Monitoring
Port monitoring is supported on both physical and logical interfaces, such as VLAN and port-channel interfaces. The source port (MD) with
monitored trac and the destination ports (MG) to which an analyzer can be attached must be on the same switch. You can congure up
to 128 source ports in a monitoring session. Only one destination port is supported in a monitoring session. The platform supports multiple
source-destination statements in a single monitor session.
The maximum number of source ports that can be supported in a session is 128.
The maximum number of destination ports that can be supported depends on the port mirroring directions as follows:
• 4 per port pipe, if the four destination ports mirror in one direction, either rx or tx.
• 2 per port pipe, if the two destination ports mirror in bidirection.
• 3 per port pipe, if one of the destination port mirrors bidirection and the other two ports mirror in one direction (either rx or tx).
In the following examples, ports 1/13, 1/14, 1/15, and 1/16 all belong to the same port-pipe. They are pointing to four dierent destinations
(1/1, 1/2, 1/3, and 1/37). Now it is not possible for another source port from the same port-pipe (for example, 1/17) to point to another new
destination (for example, 1/4). If you attempt to congure another destination (to create 5 MG port), this message displays: % Error
will be thrown in case of RPM and ERPM features.
Example of Changing the Destination Port in a Monitoring Session
DellEMC(conf-mon-sess-5)#do show moni session
SessID Source Destination Dir Mode Source IP Dest IP DSCP TTL
Drop Rate Gre-Protocol FcMonitor
------ ------ ----------- --- ---- --------- -------- ---- ---
---- ---- ----------- ---------
1 Gi 1/1 Gi 2/1 both Port N/A N/A 0 0
No N/A N/A yes
2 Gi 1/1 Gi 2/2 both Port N/A N/A 0 0
No N/A N/A yes
3 Gi 1/1 Gi 2/3 both Port N/A N/A 0 0
No N/A N/A yes
4 Gi 1/1 Gi 2/4 both Port N/A N/A 0 0
No N/A N/A yes
5 Gi 1/1 Gi 2/5 both Port N/A N/A 0 0
No N/A N/A yes
DellEMC(conf-mon-sess-5)#
DellEMC(conf)#mon ses 300
DellEMC(conf-mon-sess-300)#source gig 1/17 destination gig 1/4 direction tx
% Error: Exceeding max MG ports for this MD port pipe.
DellEMC(conf-mon-sess-300)#
DellEMC(conf-mon-sess-300)#source gig 1/17
destination gig 1/1 direction tx
DellEMC(conf-mon-sess-300)#do show mon session
SessID Source Destination Dir Mode Source IP Dest IP DSCP TTL
Drop Rate Gre-Protocol FcMonitor
------ ------ ----------- --- ---- --------- -------- ---- ---
---- ---- ----------- ---------
0 Gi 1/13 Gi 2/1 rx interface 0.0.0.0 0.0.0.0 0 0
No N/A N/A yes
10 Gi 1/14 Gi 2/2 rx interface 0.0.0.0 0.0.0.0 0 0
No N/A N/A yes
20 Gi 1/15 Gi 2/3 rx interface 0.0.0.0 0.0.0.0 0 0
No N/A N/A yes
30 Gi 1/16 Gi 2/7 rx interface 0.0.0.0 0.0.0.0 0 0
No N/A N/A yes
300 Gi 1/17 Gi 1/1 rx interface 0.0.0.0 0.0.0.0 0 0
No N/A N/A yes
DellEMC#
Example of Conguring Another Monitoring Session with a Previously Used Destination Port
DellEMC(conf)#monitor session 300
DellEMC(conf-mon-sess-300)#$ destination gigabitethernet 1/4 direction tx
Port Monitoring
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