Concept Guide

• You can congure the same port as both source and destination in an ERSPAN session.
• You can congure TTL and TOS values in the IP header of the ERSPAN trac.
Conguration steps for ERPM
To congure an ERPM session:
Table 56. Conguration steps for ERPM
Step Command Purpose
1
configure terminal
Enter global conguration mode.
2
monitor session <id> type erpm
Specify a session ID and ERPM as the type of
monitoring session, and enter the Monitoring-Session
conguration mode. The session number needs to be
unique and not already dened.
3
source { interface | range } direction
{rx | tx | both}
Specify the source port or range of ports. Specify the
ingress (rx), egress (tx), or both ingress and egress
trac to be monitored. You can enter multiple source
statements in an ERPM monitoring session
4
erpm source-ip <id> dest-ip <id> gre-
protocol <value>
Specify the source IP address, destination IP address,
and GRE-protocol type value to which encapsulated
mirrored trac is sent.
5
no flow-based enable
ERPM to be performed on a ow-by-ow basis or if you
congure a VLAN source interface. Enter the no
flow-based command to disable ow-based ERPM.
6
no disable
Enter the no disable command to enable the ERPM
session.
The following example shows an ERPM conguration:
DellEMC(conf)#monitor session 0 type erpm
DellEMC(conf-mon-sess-0)#source gigabitethernet 1/9 direction rx
DellEMC(conf-mon-sess-0)#source port-channel 1 direction tx
DellEMC(conf-mon-sess-0)#erpm source-ip 1.1.1.1 dest-ip 7.1.1.2 gre-protocol 111
DellEMC(conf-mon-sess-0)#no disable
DellEMC(conf)#monitor session 1 type erpm
DellEMC(conf-mon-sess-1)#source vlan 11 direction rx
DellEMC(conf-mon-sess-1)#erpm source-ip 5.1.1.1 dest-ip 3.1.1.2 gre-protocol 139
DellEMC(conf-mon-sess-1)#flow-based enable
DellEMC(conf-mon-sess-1)#no disable
DellEMC# show monitor session
SessID Source Destination Dir Mode Source IP Dest IP DSCP TTL Drop Rate Gre-Protocol
FcMonitor Status
------ ------ ----------- --- ---- --------- -------- ---- --- ---- ---- ------------
--------- -------
0 Gi 1/9 remote-ip rx Port 1.1.1.1 7.1.1.2 0 255 No 100 111
No Enabled
0 Po 1 remote-ip tx Port 1.1.1.1 7.1.1.2 0 255 No 100 111
No Enabled
1 Vl 11 remote-ip rx Flow 5.1.1.1 3.1.1.2 0 255 No 100 139
No Enabled
The next example shows the conguration of an ERPM session in which VLAN 11 is monitored as the source interface and a MAC ACL
lters the monitored ingress trac.
DellEMC(conf)#mac access-list standard flow
DellEMC(config-std-macl)#seq 5 permit 00:00:0a:00:00:0b count monitor
Port Monitoring
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